1
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Gulotta A, Polimeni M, Lenton S, Starr CG, Stradner A, Zaccarelli E, Schurtenberger P. Combining Scattering Experiments and Colloid Theory to Characterize Charge Effects in Concentrated Antibody Solutions. Mol Pharm 2024; 21:2250-2271. [PMID: 38661388 PMCID: PMC11080060 DOI: 10.1021/acs.molpharmaceut.3c01023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 04/08/2024] [Accepted: 04/08/2024] [Indexed: 04/26/2024]
Abstract
Charges and their contribution to protein-protein interactions are essential for the key structural and dynamic properties of monoclonal antibody (mAb) solutions. In fact, they influence the apparent molecular weight, the static structure factor, the collective diffusion coefficient, or the relative viscosity, and their concentration dependence. Further, charges play an important role in the colloidal stability of mAbs. There exist standard experimental tools to characterize mAb net charges, such as the measurement of the electrophoretic mobility, the second virial coefficient, or the diffusion interaction parameter. However, the resulting values are difficult to directly relate to the actual overall net charge of the antibody and to theoretical predictions based on its known molecular structure. Here, we report the results of a systematic investigation of the solution properties of a charged IgG1 mAb as a function of concentration and ionic strength using a combination of electrophoretic measurements, static and dynamic light scattering, small-angle X-ray scattering, and tracer particle-based microrheology. We analyze and interpret the experimental results using established colloid theory and coarse-grained computer simulations. We discuss the potential and limits of colloidal models for the description of the interaction effects of charged mAbs, in particular pointing out the importance of incorporating shape and charge anisotropy when attempting to predict structural and dynamic solution properties at high concentrations.
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Affiliation(s)
- Alessandro Gulotta
- Physical
Chemistry, Department of Chemistry, Lund
University, Lund SE-221 00, Sweden
| | - Marco Polimeni
- Physical
Chemistry, Department of Chemistry, Lund
University, Lund SE-221 00, Sweden
| | - Samuel Lenton
- Physical
Chemistry, Department of Chemistry, Lund
University, Lund SE-221 00, Sweden
| | - Charles G. Starr
- Biologics
Drug Product Development and Manufacturing, CMC Development, Sanofi, Framingham, Massachusetts 01701, United States
| | - Anna Stradner
- Physical
Chemistry, Department of Chemistry, Lund
University, Lund SE-221 00, Sweden
- LINXS
Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, Lund SE-223 70, Sweden
| | - Emanuela Zaccarelli
- Institute
for Complex Systems, National Research Council (ISC−CNR), Piazzale Aldo Moro 5, Rome 00185, Italy
- Department
of Physics, Sapienza University of Rome, Piazzale Aldo Moro 2, Rome 00185, Italy
| | - Peter Schurtenberger
- Physical
Chemistry, Department of Chemistry, Lund
University, Lund SE-221 00, Sweden
- LINXS
Institute of Advanced Neutron and X-ray Science, Scheelevägen 19, Lund SE-223 70, Sweden
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2
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Srot V, Houari S, Kapun G, Bussmann B, Predel F, Pokorny B, Bužan E, Salzberger U, Fenk B, Kelsch M, van Aken PA. Ingenious Architecture and Coloration Generation in Enamel of Rodent Teeth. ACS Nano 2024; 18:11270-11283. [PMID: 38629732 PMCID: PMC11064225 DOI: 10.1021/acsnano.4c00578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/13/2024] [Accepted: 03/19/2024] [Indexed: 05/01/2024]
Abstract
Teeth exemplify architectures comprising an interplay of inorganic and organic constituents, resulting in sophisticated natural composites. Rodents (Rodentia) showcase extraordinary adaptations, with their continuously growing incisors surpassing human teeth in functional and structural optimizations. In this study, employing state-of-the-art direct atomic-scale imaging and nanoscale spectroscopies, we present compelling evidence that the release of material from ameloblasts and the subsequent formation of iron-rich enamel and surface layers in the constantly growing incisors of rodents are complex orchestrated processes, intricately regulated and independent of environmental factors. The synergistic fusion of three-dimensional tomography and imaging techniques of etched rodent́s enamel unveils a direct correlation between the presence of pockets infused with ferrihydrite-like material and the acid resistant properties exhibited by the iron-rich enamel, fortifying it as an efficient protective shield. Moreover, observations using optical microscopy shed light on the role of iron-rich enamel as a microstructural element that acts as a path for color transmission, although the native color remains indistinguishable from that of regular enamel, challenging the prevailing paradigms. The redefinition of "pigmented enamel" to encompass ferrihydrite-like infusion in rodent incisors reshapes our perception of incisor microstructure and color generation. The functional significance of acid-resistant iron-rich enamel and the understanding of the underlying coloration mechanism in rodent incisors have far-reaching implications for human health, development of potentially groundbreaking dental materials, and restorative dentistry. These findings enable the creation of an entirely different class of dental biomaterials with enhanced properties, inspired by the ingenious designs found in nature.
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Affiliation(s)
- Vesna Srot
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Sophia Houari
- Unité
de Formation et de Recherche d’Odontologie, Université Paris Cité, Paris 75006, France
- UR2496,
Biomedical Research in Odontology, Université
Paris Cité, Montrouge 92120, France
| | - Gregor Kapun
- National
Institute of Chemistry, Ljubljana 1000, Slovenia
- Centre
of Excellence on Nanoscience and Nanotechnology−Nanocenter, Ljubljana 1000, Slovenia
| | - Birgit Bussmann
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Felicitas Predel
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Boštjan Pokorny
- Faculty
of Environmental Protection, Velenje 3320, Slovenia
- Slovenian
Forestry Institute, Ljubljana 1000, Slovenia
| | - Elena Bužan
- Faculty
of Environmental Protection, Velenje 3320, Slovenia
- Faculty
of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Koper 6000, Slovenia
| | - Ute Salzberger
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Bernhard Fenk
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Marion Kelsch
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
| | - Peter A. van Aken
- Max
Planck Institute for Solid State Research, Stuttgart 70569, Germany
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3
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Kinikar A, Wang XY, Di Giovannantonio M, Urgel JI, Liu P, Eimre K, Pignedoli CA, Stolz S, Bommert M, Mishra S, Sun Q, Widmer R, Qiu Z, Narita A, Müllen K, Ruffieux P, Fasel R. Sterically Selective [3 + 3] Cycloaromatization in the On-Surface Synthesis of Nanographenes. ACS Nanosci Au 2024; 4:128-135. [PMID: 38644965 PMCID: PMC11027121 DOI: 10.1021/acsnanoscienceau.3c00062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 12/14/2023] [Accepted: 12/15/2023] [Indexed: 04/23/2024]
Abstract
Surface-catalyzed reactions have been used to synthesize carbon nanomaterials with atomically predefined structures. The recent discovery of a gold surface-catalyzed [3 + 3] cycloaromatization of isopropyl substituted arenes has enabled the on-surface synthesis of arylene-phenylene copolymers, where the surface activates the isopropyl substituents to form phenylene rings by intermolecular coupling. However, the resulting polymers suffered from undesired cross-linking when more than two molecules reacted at a single site. Here we show that such cross-links can be prevented through steric protection by attaching the isopropyl groups to larger arene cores. Upon thermal activation of isopropyl-substituted 8,9-dioxa-8a-borabenzo[fg]tetracene on Au(111), cycloaromatization is observed to occur exclusively between the two molecules. The cycloaromatization intermediate formed by the covalent linking of two molecules is prevented from reacting with further molecules by the wide benzotetracene core, resulting in highly selective one-to-one coupling. Our findings extend the versatility of the [3 + 3] cycloaromatization of isopropyl substituents and point toward steric protection as a powerful concept for suppressing competing reaction pathways in on-surface synthesis.
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Affiliation(s)
- Amogh Kinikar
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Xiao-Ye Wang
- Max Planck
Institute for Polymer Research, 55128 Mainz, Germany
- State
Key
Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Marco Di Giovannantonio
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - José I. Urgel
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Pengcai Liu
- State
Key
Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Kristjan Eimre
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Carlo A. Pignedoli
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Samuel Stolz
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Institute
of Condensed Matter Physics, Station 3, EPFL, 1015 Lausanne, Switzerland
| | - Max Bommert
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Shantanu Mishra
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Qiang Sun
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Roland Widmer
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Zijie Qiu
- Max Planck
Institute for Polymer Research, 55128 Mainz, Germany
| | - Akimitsu Narita
- Max Planck
Institute for Polymer Research, 55128 Mainz, Germany
| | - Klaus Müllen
- Max Planck
Institute for Polymer Research, 55128 Mainz, Germany
- Department
of Chemistry, Johannes Gutenberg-Universität
Mainz, 55128 Mainz, Germany
| | - Pascal Ruffieux
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
| | - Roman Fasel
- Empa, Swiss
Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland
- Department
of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, 3012 Bern, Switzerland
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4
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Cantalapiedra-Hijar G, Nedelkov K, Crosson P, McGee M. Some plasma biomarkers of residual feed intake in beef cattle remain consistent regardless of intake level. Sci Rep 2024; 14:8540. [PMID: 38609462 PMCID: PMC11014993 DOI: 10.1038/s41598-024-59253-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 04/08/2024] [Indexed: 04/14/2024] Open
Abstract
This study investigated whether plasma biomarkers of residual feed intake (RFI), identified under ad libitum feeding conditions in beef cattle, remained consistent during feed restriction. Sixty Charolais crossbred young bulls were divided into two groups for a crossover study. Group A was initially fed ad libitum (first test) and then restricted (second test) on the same diet, while Group B experienced the opposite sequence. Blood samples were collected from the 12 most divergent RFI animals in each group at the end of the first test and again after the second test. 12 plasma variables consistently increased, while three consistently decreased during feed restriction (FDR < 0.05). Only two metabolites, α-aminoadipic acid for Group A and 5-aminovaleric acid for Group B, were associated with RFI independent of feed intake level (FDR < 0.05), demonstrating moderate-to-high repeatability across feeding levels (intraclass correlation coefficient ≥ 0.59). Notably, both metabolites belong to the same metabolic pathway: lysine degradation. These metabolites consistently correlated with RFI, irrespective of fluctuations in feed intake, indicating a connection to individual metabolic processes influencing feed efficiency. These findings suggest that a portion of RFI phenotypic variance is inherent to an individual's metabolic efficiency beyond variations in feed intake.
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Affiliation(s)
- G Cantalapiedra-Hijar
- Université Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, 63122, St-Genès-Champanelle, France.
| | - K Nedelkov
- Faculty of Veterinary Medicine, Trakia University, Stara Zagora, 6000, Bulgaria
| | - P Crosson
- Teagasc, Animal & Grassland Research and Innovation Centre, Grange, Dunsany, Co. Meath, Ireland
| | - M McGee
- Teagasc, Animal & Grassland Research and Innovation Centre, Grange, Dunsany, Co. Meath, Ireland
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5
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Hartner E, Gawlitta N, Gröger T, Orasche J, Czech H, Geldenhuys GL, Jakobi G, Tiitta P, Yli-Pirilä P, Kortelainen M, Sippula O, Forbes P, Zimmermann R. Chemical Fingerprinting of Biomass Burning Organic Aerosols from Sugar Cane Combustion: Complementary Findings from Field and Laboratory Studies. ACS Earth Space Chem 2024; 8:533-546. [PMID: 38533192 PMCID: PMC10961841 DOI: 10.1021/acsearthspacechem.3c00301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 02/02/2024] [Accepted: 02/15/2024] [Indexed: 03/28/2024]
Abstract
Agricultural fires are a major source of biomass-burning organic aerosols (BBOAs) with impacts on health, the environment, and climate. In this study, globally relevant BBOA emissions from the combustion of sugar cane in both field and laboratory experiments were analyzed using comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry. The derived chemical fingerprints of fresh emissions were evaluated using targeted and nontargeted evaluation approaches. The open-field sugar cane burning experiments revealed the high chemical complexity of combustion emissions, including compounds derived from the pyrolysis of (hemi)cellulose, lignin, and further biomass, such as pyridine and oxime derivatives, methoxyphenols, and methoxybenzenes, as well as triterpenoids. In comparison, laboratory experiments could only partially model the complexity of real combustion events. Our results showed high variability between the conducted field and laboratory experiments, which we, among others, discuss in terms of differences in combustion conditions, fuel composition, and atmospheric processing. We conclude that both field and laboratory studies have their merits and should be applied complementarily. While field studies under real-world conditions are essential to assess the general impact on air quality, climate, and environment, laboratory studies are better suited to investigate specific emissions of different biomass types under controlled conditions.
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Affiliation(s)
- Elena Hartner
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
- Joint
Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
| | - Nadine Gawlitta
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
| | - Thomas Gröger
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
| | - Jürgen Orasche
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
| | - Hendryk Czech
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
- Joint
Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
| | - Genna-Leigh Geldenhuys
- Department
of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria 0002, South Africa
| | - Gert Jakobi
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
| | - Petri Tiitta
- Atmospheric
Research Centre of Eastern Finland, Finnish
Meteorological Institute, P.O. Box 1627, 70211 Kuopio, Finland
| | - Pasi Yli-Pirilä
- Department
of Environmental and Biological Sciences, University of Eastern Finland, Yliopistonranta
1, P.O. Box 1627, FI-70210 Kuopio, Finland
| | - Miika Kortelainen
- Department
of Environmental and Biological Sciences, University of Eastern Finland, Yliopistonranta
1, P.O. Box 1627, FI-70210 Kuopio, Finland
| | - Olli Sippula
- Department
of Environmental and Biological Sciences, University of Eastern Finland, Yliopistonranta
1, P.O. Box 1627, FI-70210 Kuopio, Finland
- Department
of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
| | - Patricia Forbes
- Department
of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria 0002, South Africa
| | - Ralf Zimmermann
- Joint
Mass Spectrometry Center (JMSC) at Comprehensive Molecular Analytics
(CMA), Helmholtz Zentrum München, Ingolstädter Landstr. 1, D-85764 Neuherberg, Germany
- Joint
Mass Spectrometry Center (JMSC) at Analytical Chemistry, Institute of Chemistry, University of Rostock, Albert-Einstein-Straße 27, D-18059 Rostock, Germany
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6
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Fromont LA, Moldes M, Baudis M, Brookes AJ, Navarro A, Rambla J. Twelve quick tips for deploying a Beacon. PLoS Comput Biol 2024; 20:e1011817. [PMID: 38427629 PMCID: PMC10906850 DOI: 10.1371/journal.pcbi.1011817] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2024] Open
Affiliation(s)
- Lauren A. Fromont
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Mauricio Moldes
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Michael Baudis
- University of Zurich, Zurich, Switzerland
- Swiss Institute of Bioinformatics, Zurich, Switzerland
| | - Anthony J. Brookes
- Department of Genetics & Genome Biology, University of Leicester, Leicester, United Kingdom
| | - Arcadi Navarro
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Department of Medicine and Life Sciences, Universitat Pompeu Fabra, PRBB, Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA) and Universitat Pompeu Fabra, Barcelona, Spain
- BarcelonaBeta Brain Research Center, Pasqual Maragall Foundation, Barcelona, Spain
- IBE, Institute of Evolutionary Biology (UPF-CSIC), Department of Medicine and Life
| | - Jordi Rambla
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Barcelona, Spain
- Department of Medicine and Life Sciences, Universitat Pompeu Fabra, PRBB, Barcelona, Spain
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7
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Dou Y, Mäkinen M, Jänis J. High-Resolution Mass Spectrometry-Based Chemical Fingerprinting of Baijiu, a Traditional Chinese Liquor. ACS Omega 2024; 9:9443-9451. [PMID: 38434869 PMCID: PMC10905708 DOI: 10.1021/acsomega.3c08993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Revised: 01/28/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024]
Abstract
Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry, coupled with electrospray ionization (ESI) or atmospheric-pressure photoionization (APPI), was employed for chemical fingerprinting of baijiu, a traditional Chinese liquor. Baijiu is the most consumed distilled alcoholic beverage globally, with over 10 billion liters sold annually. It is a white (transparent) spirit that exhibits similarities to dark spirits such as whisky or rum in terms of aroma and mouthfeel. In this study, direct-infusion FT-ICR mass spectrometry was used to analyze 10 commercially available baijiu liquors, enabling the examination of both volatile and nonvolatile constituents without the need for tedious sample extractions or compound derivatizations. The chemical fingerprints obtained by FT-ICR MS revealed substantial compositional diversity among different baijiu liquors, reflecting variations in the raw materials and production methods. The main compounds identified included a variety of acids, esters, aldehydes, lactones, terpenes, and phenolic compounds. The use of ESI and APPI provided complementary compositional information; while ESI demonstrated greater selectivity toward polar, aliphatic sample constituents, APPI also ionized semipolar and nonpolar (aromatic) ones.
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Affiliation(s)
- Yanning Dou
- Department of Chemistry, University of Eastern Finland, P.O.
Box 111, Joensuu FI-80101, Finland
| | - Marko Mäkinen
- Department of Chemistry, University of Eastern Finland, P.O.
Box 111, Joensuu FI-80101, Finland
| | - Janne Jänis
- Department of Chemistry, University of Eastern Finland, P.O.
Box 111, Joensuu FI-80101, Finland
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8
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Altincekic N, Jores N, Löhr F, Richter C, Ehrhardt C, Blommers MJJ, Berg H, Öztürk S, Gande SL, Linhard V, Orts J, Abi Saad MJ, Bütikofer M, Kaderli J, Karlsson BG, Brath U, Hedenström M, Gröbner G, Sauer UH, Perrakis A, Langer J, Banci L, Cantini F, Fragai M, Grifagni D, Barthel T, Wollenhaupt J, Weiss MS, Robertson A, Bax A, Sreeramulu S, Schwalbe H. Targeting the Main Protease (M pro, nsp5) by Growth of Fragment Scaffolds Exploiting Structure-Based Methodologies. ACS Chem Biol 2024; 19:563-574. [PMID: 38232960 PMCID: PMC10877576 DOI: 10.1021/acschembio.3c00720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 01/19/2024]
Abstract
The main protease Mpro, nsp5, of SARS-CoV-2 (SCoV2) is one of its most attractive drug targets. Here, we report primary screening data using nuclear magnetic resonance spectroscopy (NMR) of four different libraries and detailed follow-up synthesis on the promising uracil-containing fragment Z604 derived from these libraries. Z604 shows time-dependent binding. Its inhibitory effect is sensitive to reducing conditions. Starting with Z604, we synthesized and characterized 13 compounds designed by fragment growth strategies. Each compound was characterized by NMR and/or activity assays to investigate their interaction with Mpro. These investigations resulted in the four-armed compound 35b that binds directly to Mpro. 35b could be cocrystallized with Mpro revealing its noncovalent binding mode, which fills all four active site subpockets. Herein, we describe the NMR-derived fragment-to-hit pipeline and its application for the development of promising starting points for inhibitors of the main protease of SCoV2.
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Affiliation(s)
- Nadide Altincekic
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Nathalie Jores
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Frank Löhr
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Institute
of Biophysical Chemistry, Goethe University
Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Christian Richter
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Claus Ehrhardt
- Department
of Biochemistry, University of Zurich, 8093 Zurich, Switzerland
| | | | - Hannes Berg
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Sare Öztürk
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Santosh L. Gande
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Verena Linhard
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Julien Orts
- Department
of Pharmaceutical Sciences, University of
Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria
| | - Marie Jose Abi Saad
- Department
of Pharmaceutical Sciences, University of
Vienna, Josef-Holaubek-Platz 2, 1090 Vienna, Austria
| | - Matthias Bütikofer
- Swiss
Federal Institute of Technology, Laboratory of Physical Chemistry, ETH Zurich, 8093 Zürich, Switzerland
| | - Janina Kaderli
- Swiss
Federal Institute of Technology, Laboratory of Physical Chemistry, ETH Zurich, 8093 Zürich, Switzerland
| | - B. Göran Karlsson
- Swedish
NMR Centre, Department of Chemistry and Molecular Biology, University of Gothenburg, SE40530 Göteborg, Sweden
- SciLifeLab, University of Gothenburg, SE40530 Göteborg, Sweden
| | - Ulrika Brath
- Swedish
NMR Centre, Department of Chemistry and Molecular Biology, University of Gothenburg, SE40530 Göteborg, Sweden
| | - Mattias Hedenström
- Swedish
NMR Centre, Department of Chemistry, University
of Umeå, SE-90187 Umeå, Sweden
| | - Gerhard Gröbner
- Swedish
NMR Centre, Department of Chemistry, University
of Umeå, SE-90187 Umeå, Sweden
| | - Uwe H. Sauer
- Protein
Production Sweden, Department of Chemistry, University of Umeå, SE-90187 Umeå, Sweden
| | - Anastassis Perrakis
- Oncode
Institute and Division of Biochemistry, The Netherlands Cancer Institute, 1066CX Amsterdam, The Netherlands
| | - Julian Langer
- Max Planck Institute of
Biophysics, D-60438 Frankfurt am Main, Germany
| | - Lucia Banci
- Magnetic
Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
- Consorzio
Interuniversitario Risonanze Magnetiche Metalloproteine, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
| | - Francesca Cantini
- Magnetic
Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
- Consorzio
Interuniversitario Risonanze Magnetiche Metalloproteine, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
| | - Marco Fragai
- Magnetic
Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
- Consorzio
Interuniversitario Risonanze Magnetiche Metalloproteine, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
| | - Deborah Grifagni
- Magnetic
Resonance Center and Department of Chemistry, University of Florence, Via L. Sacconi 6, 50019 Sesto Fiorentino, Italy
| | - Tatjana Barthel
- Macromolecular
Crystallography, Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
| | - Jan Wollenhaupt
- Macromolecular
Crystallography, Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
| | - Manfred S. Weiss
- Macromolecular
Crystallography, Helmholtz-Zentrum Berlin, Albert-Einstein-Str. 15, D-12489 Berlin, Germany
| | | | - Adriaan Bax
- NIH, LCP NIDDK, Bethesda, Maryland 20892, United States
| | - Sridhar Sreeramulu
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
| | - Harald Schwalbe
- Institute
for Organic Chemistry and Chemical Biology, Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
- Center
of Biomolecular Magnetic Resonance (BMRZ), Goethe University Frankfurt am Main, D-60438 Frankfurt, Germany
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9
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Nouchikian L, Fernandez-Martinez D, Renard PY, Sabot C, Duménil G, Rey M, Chamot-Rooke J. Do Not Waste Time─Ensure Success in Your Cross-Linking Mass Spectrometry Experiments before You Begin. Anal Chem 2024; 96:2506-2513. [PMID: 38294351 PMCID: PMC10867798 DOI: 10.1021/acs.analchem.3c04682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 01/09/2024] [Accepted: 01/19/2024] [Indexed: 02/01/2024]
Abstract
Cross-linking mass spectrometry (XL-MS) has become a very useful tool for studying protein complexes and interactions in living systems. It enables the investigation of many large and dynamic assemblies in their native state, providing an unbiased view of their protein interactions and restraints for integrative modeling. More researchers are turning toward trying XL-MS to probe their complexes of interest, especially in their native environments. However, due to the presence of other potentially higher abundant proteins, sufficient cross-links on a system of interest may not be reached to achieve satisfactory structural and interaction information. There are currently no rules for predicting whether XL-MS experiments are likely to work or not; in other words, if a protein complex of interest will lead to useful XL-MS data. Here, we show that a simple iBAQ (intensity-based absolute quantification) analysis performed from trypsin digest data can provide a good understanding of whether proteins of interest are abundant enough to achieve successful cross-linking data. Comparing our findings to large-scale data on diverse systems from several other groups, we show that proteins of interest should be at least in the top 20% abundance range to expect more than one cross-link found per protein. We foresee that this guideline is a good starting point for researchers who would like to use XL-MS to study their protein of interest and help ensure a successful cross-linking experiment from the beginning. Data are available via ProteomeXchange with identifier PXD045792.
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Affiliation(s)
- Lucienne Nouchikian
- Institut
Pasteur, Université Paris Cité, CNRS UAR 2024, Mass
Spectrometry for Biology Unit, Paris 75015, France
| | - David Fernandez-Martinez
- Institut
Pasteur, Université Paris Cité, INSERM UMR1225, Pathogenesis
of Vascular Infections Unit, Paris 75015, France
| | - Pierre-Yves Renard
- Univ
Rouen Normandie, INSA Rouen Normandie, CNRS, Normandie Univ, COBRA
UMR 6014, INC3M FR 3038, Rouen F-76000, France
| | - Cyrille Sabot
- Univ
Rouen Normandie, INSA Rouen Normandie, CNRS, Normandie Univ, COBRA
UMR 6014, INC3M FR 3038, Rouen F-76000, France
| | - Guillaume Duménil
- Institut
Pasteur, Université Paris Cité, INSERM UMR1225, Pathogenesis
of Vascular Infections Unit, Paris 75015, France
| | - Martial Rey
- Institut
Pasteur, Université Paris Cité, CNRS UAR 2024, Mass
Spectrometry for Biology Unit, Paris 75015, France
| | - Julia Chamot-Rooke
- Institut
Pasteur, Université Paris Cité, CNRS UAR 2024, Mass
Spectrometry for Biology Unit, Paris 75015, France
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10
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Li L, Thomsen D, Wu C, Priestley M, Iversen EM, Tygesen Sko̷nager J, Luo Y, Ehn M, Roldin P, Pedersen HB, Bilde M, Glasius M, Hallquist M. Gas-to-Particle Partitioning of Products from Ozonolysis of Δ 3-Carene and the Effect of Temperature and Relative Humidity. J Phys Chem A 2024; 128:918-928. [PMID: 38293769 PMCID: PMC10860141 DOI: 10.1021/acs.jpca.3c07316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Revised: 01/08/2024] [Accepted: 01/08/2024] [Indexed: 02/01/2024]
Abstract
Formation of oxidized products from Δ3-carene (C10H16) ozonolysis and their gas-to-particle partitioning at three temperatures (0, 10, and 20 °C) under dry conditions (<2% RH) and also at 10 °C under humid (78% RH) conditions were studied using a time-of-flight chemical ionization mass spectrometer (ToF-CIMS) combined with a filter inlet for gases and aerosols (FIGAERO). The Δ3-carene ozonolysis products detected by the FIGAERO-ToF-CIMS were dominated by semivolatile organic compounds (SVOCs). The main effect of increasing temperature or RH on the product distribution was an increase in fragmentation of monomer compounds (from C10 to C7 compounds), potentially via alkoxy scission losing a C3 group. The equilibrium partitioning coefficient estimated according to equilibrium partitioning theory shows that the measured SVOC products distribute more into the SOA phase as the temperature decreases from 20 to 10 and 0 °C and for most products as the RH increases from <2 to 78%. The temperature dependency of the saturation vapor pressure (above an assumed liquid state), derived from the partitioning method, also allows for a direct way to obtain enthalpy of vaporization for the detected species without accessibility of authentic standards of the pure substances. This method can provide physical properties, beneficial for, e.g., atmospheric modeling, of complex multifunctional oxidation products.
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Affiliation(s)
- Linjie Li
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 41296, Sweden
| | - Ditte Thomsen
- Department
of Chemistry, Aarhus University, Aarhus 8000, Denmark
| | - Cheng Wu
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 41296, Sweden
| | - Michael Priestley
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 41296, Sweden
| | | | | | - Yuanyuan Luo
- Institute
for Atmospheric and Earth System Research/Physics, University of Helsinki, Helsinki 00014, Finland
| | - Mikael Ehn
- Institute
for Atmospheric and Earth System Research/Physics, University of Helsinki, Helsinki 00014, Finland
| | - Pontus Roldin
- Department
of Physics, Lund University, Lund 22100, Sweden
- IVL
Swedish Environmental Institute, Malmö21119, Sweden
| | - Henrik B. Pedersen
- Department
of Physics and Astronomy, Aarhus University, Aarhus 8000, Denmark
| | - Merete Bilde
- Department
of Chemistry, Aarhus University, Aarhus 8000, Denmark
| | - Marianne Glasius
- Department
of Chemistry, Aarhus University, Aarhus 8000, Denmark
| | - Mattias Hallquist
- Department
of Chemistry and Molecular Biology, University
of Gothenburg, Gothenburg 41296, Sweden
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11
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Guzman YC, Żyła D. A New Eyeless Species of Micranops Cameron 1913 from Bolivia (Coleoptera: Staphylinidae: Paederinae). Neotrop Entomol 2024; 53:154-161. [PMID: 38095829 PMCID: PMC10834603 DOI: 10.1007/s13744-023-01106-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 11/17/2023] [Indexed: 02/03/2024]
Abstract
This work adds a new eyeless species of the genus Micranops Cameron, 1913 (Staphylinidae, Paederinae, Scopaeina) to the endogean Coleoptera of the Bolivian fauna. The loss of eyes is usually associated with adaptations to subterranean habitats, although M. bolivianus Guzman & Żyła sp. nov. was collected from leaf litter. We also report new occurrences for the genus west of the Andes mountain range. Our work increases the number of known Neotropical Micranops species to seven and extends the known distribution range for the genus in South America.
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Affiliation(s)
- Yoan Camilo Guzman
- Museum and Institute of Zoology, Polish Academy of Sciences, Warsaw, Poland.
| | - Dagmara Żyła
- Museum of Nature Hamburg, Leibniz Institute for the Analysis of Biodiversity Change, Hamburg, Germany
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12
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Dhenin J, Lafont V, Dupré M, Krick A, Mauriac C, Chamot-Rooke J. Monitoring mAb proteoforms in mouse plasma using an automated immunocapture combined with top-down and middle-down mass spectrometry. Proteomics 2024; 24:e2300069. [PMID: 37480175 DOI: 10.1002/pmic.202300069] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 06/27/2023] [Accepted: 07/10/2023] [Indexed: 07/23/2023]
Abstract
Monoclonal antibodies (mAbs) have established themselves as the leading biopharmaceutical therapeutic modality. Once the developability of a mAb drug candidate has been assessed, an important step is to check its in vivo stability through pharmacokinetics (PK) studies. The gold standard is ligand-binding assay (LBA) and liquid chromatography-mass spectrometry (LC-MS) performed at the peptide level (bottom-up approach). However, these analytical techniques do not allow to address the different mAb proteoforms that can arise from biotransformation. In recent years, top-down and middle-down mass spectrometry approaches have gained popularity to characterize proteins at the proteoform level but are not yet widely used for PK studies. We propose here a workflow based on an automated immunocapture followed by top-down and middle-down liquid chromatography-tandem mass spectrometry (LC-MS/MS) approaches to characterize mAb proteoforms spiked in mouse plasma. We demonstrate the applicability of our workflow on a large concentration range using pembrolizumab as a model. We also compare the performance of two state-of-the-art Orbitrap platforms (Tribrid Eclipse and Exploris 480) for these studies. The added value of our workflow for an accurate and sensitive characterization of mAb proteoforms in mouse plasma is highlighted.
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Affiliation(s)
- Jonathan Dhenin
- Institut Pasteur, Université Paris Cité, CNRS UAR2024, Mass Spectrometry for Biology, Paris, France
- Université Paris Cité, Sorbonne Paris Cité, Paris, France
- DMPK, Sanofi R&D, Chilly-Mazarin, France
| | | | | | | | | | - Julia Chamot-Rooke
- Institut Pasteur, Université Paris Cité, CNRS UAR2024, Mass Spectrometry for Biology, Paris, France
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13
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Polák M, Černý J, Novák P. Isotopic Depletion Increases the Spatial Resolution of FPOP Top-Down Mass Spectrometry Analysis. Anal Chem 2024; 96:1478-1487. [PMID: 38226459 PMCID: PMC10831798 DOI: 10.1021/acs.analchem.3c03759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/08/2023] [Accepted: 12/15/2023] [Indexed: 01/17/2024]
Abstract
Protein radical labeling, like fast photochemical oxidation of proteins (FPOP), coupled to a top-down mass spectrometry (MS) analysis offers an alternative analytical method for probing protein structure or protein interaction with other biomolecules, for instance, proteins and DNA. However, with the increasing mass of studied analytes, the MS/MS spectra become complex and exhibit a low signal-to-noise ratio. Nevertheless, these difficulties may be overcome by protein isotope depletion. Thus, we aimed to use protein isotope depletion to analyze FPOP-oxidized samples by top-down MS analysis. For this purpose, we prepared isotopically natural (IN) and depleted (ID) forms of the FOXO4 DNA binding domain (FOXO4-DBD) and studied the protein-DNA interaction interface with double-stranded DNA, the insulin response element (IRE), after exposing the complex to hydroxyl radicals. As shown by comparing tandem mass spectra of natural and depleted proteins, the ID form increased the signal-to-noise ratio of useful fragment ions, thereby enhancing the sequence coverage by more than 19%. This improvement in the detection of fragment ions enabled us to detect 22 more oxidized residues in the ID samples than in the IN sample. Moreover, less common modifications were detected in the ID sample, including the formation of ketones and lysine carbonylation. Given the higher quality of ID top-down MSMS data set, these results provide more detailed information on the complex formation between transcription factors and DNA-response elements. Therefore, our study highlights the benefits of isotopic depletion for quantitative top-down proteomics. Data are available via ProteomeXchange with the identifier PXD044447.
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Affiliation(s)
- Marek Polák
- Institute
of Microbiology of the Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department
of Biochemistry, Faculty of Science, Charles
University, 12843 Prague, Czech Republic
| | - Jiří Černý
- Laboratory
of Structural Bioinformatics of Proteins, Institute of Biotechnology of the Czech Academy of Sciences, 14220 Prague, Czech Republic
| | - Petr Novák
- Institute
of Microbiology of the Czech Academy of Sciences, 14220 Prague, Czech Republic
- Department
of Biochemistry, Faculty of Science, Charles
University, 12843 Prague, Czech Republic
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14
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Luchinat E, Barbieri L, Davis B, Brough PA, Pennestri M, Banci L. Ligand-Based Competition Binding by Real-Time 19F NMR in Human Cells. J Med Chem 2024; 67:1115-1126. [PMID: 38215028 PMCID: PMC10823471 DOI: 10.1021/acs.jmedchem.3c01600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/17/2023] [Accepted: 12/26/2023] [Indexed: 01/14/2024]
Abstract
The development of more effective drugs requires knowledge of their bioavailability and binding efficacy directly in the native cellular environment. In-cell nuclear magnetic resonance (NMR) spectroscopy is a powerful tool for investigating ligand-target interactions directly in living cells. However, the target molecule may be NMR-invisible due to interactions with cellular components, while observing the ligand by 1H NMR is impractical due to the cellular background. Such limitations can be overcome by observing fluorinated ligands by 19F in-cell NMR as they bind to the intracellular target. Here we report a novel approach based on real-time in-cell 19F NMR that allows measuring ligand binding affinities in human cells by competition binding, using a fluorinated compound as a reference. The binding of a set of compounds toward Hsp90α was investigated. In principle, this approach could be applied to other pharmacologically relevant targets, thus aiding the design of more effective compounds in the early stages of drug development.
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Affiliation(s)
- Enrico Luchinat
- Dipartimento
di Scienze e Tecnologie Agro-Alimentari, Alma Mater Studiorum—Università di Bologna, Piazza Goidanich 60, Cesena 47521, Italy
- Consorzio
Interuniversitario Risonanze Magnetiche di Metallo Proteine—CIRMMP, Via Luigi Sacconi 6, Sesto Fiorentino 50019, Italy
| | - Letizia Barbieri
- Consorzio
Interuniversitario Risonanze Magnetiche di Metallo Proteine—CIRMMP, Via Luigi Sacconi 6, Sesto Fiorentino 50019, Italy
| | - Ben Davis
- Vernalis
Research, Granta Park, Great Abington, Cambridge CB21 6GB, U.K.
| | - Paul A. Brough
- Vernalis
Research, Granta Park, Great Abington, Cambridge CB21 6GB, U.K.
| | - Matteo Pennestri
- Pharmaceutical
Business Unit, Bruker UK Limited, Banner Lane, Coventry CV4 9GH, U.K.
| | - Lucia Banci
- Consorzio
Interuniversitario Risonanze Magnetiche di Metallo Proteine—CIRMMP, Via Luigi Sacconi 6, Sesto Fiorentino 50019, Italy
- Centro
di Risonanze Magnetiche—CERM, Università
degli Studi di Firenze, Via Luigi Sacconi 6, Sesto Fiorentino 50019, Italy
- Dipartimento
di Chimica, Università degli Studi
di Firenze, Via della
Lastruccia 3, Sesto Fiorentino 50019, Italy
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15
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Petrov D, Perthold JW, Oostenbrink C, de Groot BL, Gapsys V. Guidelines for Free-Energy Calculations Involving Charge Changes. J Chem Theory Comput 2024; 20:914-925. [PMID: 38164763 PMCID: PMC10809403 DOI: 10.1021/acs.jctc.3c00757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/24/2023] [Accepted: 11/27/2023] [Indexed: 01/03/2024]
Abstract
The Coulomb interactions in molecular simulations are inherently approximated due to the finite size of the molecular box sizes amenable to current-day compute power. Several methods exist for treating long-range electrostatic interactions, yet these approaches are subject to various finite-size-related artifacts. Lattice-sum methods are frequently used to approximate long-range interactions; however, these approaches also suffer from artifacts which become particularly pronounced for free-energy calculations that involve charge changes. The artifacts, however, also affect the sampling when plain simulations are performed, leading to a biased ensemble. Here, we investigate two previously described model systems to determine if artifacts continue to play a role when overall neutral boxes are considered, in the context of both free-energy calculations and sampling. We find that ensuring that no net-charge changes take place, while maintaining a neutral simulation box, may be sufficient provided that the simulation boxes are large enough. Addition of salt to the solution (when appropriate) can further alleviate the remaining artifacts in the sampling or the calculated free-energy differences. We provide practical guidelines to avoid finite-size artifacts.
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Affiliation(s)
- Drazen Petrov
- Institute
for Molecular Modeling and Simulation, Department of Material Sciences
and Process Engineering, University of Natural
Resources and Life Sciences, Vienna, Vienna 1190, Austria
| | - Jan Walther Perthold
- Institute
for Molecular Modeling and Simulation, Department of Material Sciences
and Process Engineering, University of Natural
Resources and Life Sciences, Vienna, Vienna 1190, Austria
| | - Chris Oostenbrink
- Institute
for Molecular Modeling and Simulation, Department of Material Sciences
and Process Engineering, University of Natural
Resources and Life Sciences, Vienna, Vienna 1190, Austria
- Christian
Doppler Laboratory for Molecular Informatics in the Biosciences, University of Natural Resources and Life Sciences, Vienna, Vienna 1190, Austria
| | - Bert L. de Groot
- Computational
Biomolecular Dynamics Group, Department of Theoretical and Computational
Biophysics, Max Planck Institute for Multidisciplinary
Sciences, Göttingen 37077, Germany
| | - Vytautas Gapsys
- Computational
Biomolecular Dynamics Group, Department of Theoretical and Computational
Biophysics, Max Planck Institute for Multidisciplinary
Sciences, Göttingen 37077, Germany
- Computational
Chemistry, Janssen Research & Development, Janssen Pharmaceutica N. V., Turnhoutseweg
30, Beerse B-2340, Belgium
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16
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Zapata-Rivera J, Calzado CJ. Dinitrogen Activation Mediated by the (P 2P Ph)Fe Complex: Electronic Structure, Dimerization Mechanism, and Magnetic Coupling. Inorg Chem 2024; 63:1633-1641. [PMID: 38194669 PMCID: PMC10954229 DOI: 10.1021/acs.inorgchem.3c03813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 12/18/2023] [Accepted: 12/22/2023] [Indexed: 01/11/2024]
Abstract
Herein, we report the estimation of the extent of dinitrogen activation by different charged and structural forms of (P2PPh)Fe biomimetic catalysts, which, in the presence of light, exhibit significant yield in the N2-to-NH3 conversion. Complete active space self-consistent field (CASSCF) calculations have been used to determine the electronic structure of different reduced forms of the mononuclear complexes: the neutral (P2PPh)Fe(N2)2 adduct and the anionic [(P2PPh)Fe(N2)]- and [(P2PPh)Fe(N2)]2- complexes. These calculations also revealed that the extent of reduction of a dinitrogen molecule reaches up to one electron (N21-) due to the back-bonding from the Fe center, in agreement with the changes observed in the vibration frequency of the N-N bond in these complexes. In addition, the energy profile of the dimerization of the mononuclear (P2PPh)Fe(N2)2 complex to the dinuclear mono-N2-bridged [(P2PPh)Fe]2(μ-N2) complex has been determined by means of density functional theory (DFT) calculations. A three-step mechanism has been proposed for the dimerization, favored by both kinetics and thermodynamics criteria. Finally, the magnetic coupling constant in the diiron (μ-N2) complex is estimated from CASSCF/NEVPT2 calculations. Such a dinuclear complex presents a strong antiferromagnetic coupling resulting from the interaction between two S = 1 d6 Fe2+ ions, bridged by a highly activated dinitrogen molecule (N22-) with two electrons on the π* orbitals.
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Affiliation(s)
- Jhon Zapata-Rivera
- Facultad
de Ciencias Naturales y Exactas, Departamento de Química, Universidad del Valle, Calle 13 N° 100–00, 25360 Cali, Colombia
| | - Carmen J. Calzado
- Departamento
de Química Física, Universidad
de Sevilla, c/Profesor
García González, s/n, 41012 Sevilla, Spain
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17
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Lingstädt R, Davoodi F, Elibol K, Taleb M, Kwon H, Fischer P, Talebi N, van Aken PA. Electron Beam Induced Circularly Polarized Light Emission of Chiral Gold Nanohelices. ACS Nano 2023; 17:25496-25506. [PMID: 37992234 PMCID: PMC10753880 DOI: 10.1021/acsnano.3c09336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 11/24/2023]
Abstract
Chiral plasmonic nanostructures possess a chiroptical response orders of magnitude stronger than that of natural biomolecular systems, making them highly promising for a wide range of biochemical, medical, and physical applications. Despite extensive efforts to artificially create and tune the chiroptical properties of chiral nanostructures through compositional and geometrical modifications, a fundamental understanding of their underlying mechanisms remains limited. In this study, we present a comprehensive investigation of individual gold nanohelices by using advanced analytical electron microscopy techniques. Our results, as determined by angle-resolved cathodoluminescence polarimetry measurements, reveal a strong correlation between the circular polarization state of the emitted far-field radiation and the handedness of the chiral nanostructure in terms of both its dominant circularity and directional intensity distribution. Further analyses, including electron energy-loss measurements and numerical simulations, demonstrate that this correlation is driven by longitudinal plasmonic modes that oscillate along the helical windings, much like straight nanorods of equal strength and length. However, due to the three-dimensional shape of the structures, these longitudinal modes induce dipolar transverse modes with charge oscillations along the short axis of the helices for certain resonance energies. Their radiative decay leads to observed emission in the visible range. Our findings provide insight into the radiative properties and underlying mechanisms of chiral plasmonic nanostructures and enable their future development and application in a wide range of fields, such as nano-optics, metamaterials, molecular physics, biochemistry, and, most promising, chiral sensing via plasmonically enhanced chiral optical spectroscopy techniques.
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Affiliation(s)
- Robin Lingstädt
- Max
Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Fatemeh Davoodi
- Institute
of Experimental and Applied Physics, Christian
Albrechts University, Kiel, 24118, Germany
| | - Kenan Elibol
- Max
Planck Institute for Solid State Research, Stuttgart, 70569, Germany
| | - Masoud Taleb
- Institute
of Experimental and Applied Physics, Christian
Albrechts University, Kiel, 24118, Germany
| | - Hyunah Kwon
- Max
Planck Institute for Medical Research, Heidelberg, 69120, Germany
- Institute
for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Heidelberg, 69120, Germany
| | - Peer Fischer
- Max
Planck Institute for Medical Research, Heidelberg, 69120, Germany
- Institute
for Molecular Systems Engineering and Advanced Materials, Heidelberg University, Heidelberg, 69120, Germany
| | - Nahid Talebi
- Institute
of Experimental and Applied Physics, Christian
Albrechts University, Kiel, 24118, Germany
- Kiel
Nano, Surface and Interface Science KiNSIS, Christian Albrechts University, Kiel, 24118, Germany
| | - Peter A. van Aken
- Max
Planck Institute for Solid State Research, Stuttgart, 70569, Germany
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18
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Rusakov K, Demianiuk S, Jalonicka E, Hanczyc P. Cavity Lasing Characteristics of Thioflavin T and Thioflavin X in Different Solvents and Their Interaction with DNA for the Controlled Reduction of a Light Amplification Threshold in Solid-State Biofilms. ACS Appl Opt Mater 2023; 1:1922-1929. [PMID: 38149104 PMCID: PMC10749465 DOI: 10.1021/acsaom.3c00264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 09/21/2023] [Accepted: 09/29/2023] [Indexed: 12/28/2023]
Abstract
The lasing characteristics of Thioflavin T (ThT) and Thioflavin X (ThX) dyes were investigated in solvents with increasing viscosity: water, ethanol, butanol, ethylene glycol, and glycerol and three forms of DNA (double-helix natural, fragmented, and aggregated). The results identified that lasing thresholds and photostability depend on three critical factors: the solvation shell surrounding dye molecules, the organization of their dipole moments, which is driven by the DNA structure, and the molecules diffusion coefficient in the excitation focal spot. The research highlights that dye doped to DNA accumulated in binding sites fosters long-range dye orientation, facilitating a marked reduction of lasing thresholds in the liquid phase as well as amplified spontaneous emission (ASE) thresholds in the solid state. Leveraging insights from lasing characteristics obtained in liquid, ASE in the solid state was optimized in a controlled way by changing the parameters influencing the DNA structure, i.e., magnesium salt addition, heating, and sonication. The modifications led to a large decrease in the ASE thresholds in the dye-doped DNA films. It was shown that the examination of lasing in cavities can be useful for preparing optical materials with improved architectures and functionalities for solid-state lasers.
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Affiliation(s)
- K. Rusakov
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
- Faculty
of Construction and Environmental Engineering, Warsaw University of Life Sciences, 02-776 Warsaw, Poland
| | - S. Demianiuk
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - E. Jalonicka
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
| | - P. Hanczyc
- Institute
of Experimental Physics, Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland
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19
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Murataj I, Angelini A, Cara E, Porro S, Beckhoff B, Kayser Y, Hönicke P, Ciesielski R, Gollwitzer C, Soltwisch V, Perez-Murano F, Fernandez-Regulez M, Carignano S, Boarino L, Castellino M, Ferrarese Lupi F. Hybrid Metrology for Nanostructured Optical Metasurfaces. ACS Appl Mater Interfaces 2023; 15:57992-58002. [PMID: 37991460 PMCID: PMC10739581 DOI: 10.1021/acsami.3c13923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/23/2023] [Accepted: 11/07/2023] [Indexed: 11/23/2023]
Abstract
Metasurfaces have garnered increasing research interest in recent years due to their remarkable advantages, such as efficient miniaturization and novel functionalities compared to traditional optical elements such as lenses and filters. These advantages have facilitated their rapid commercial deployment. Recent advancements in nanofabrication have enabled the reduction of optical metasurface dimensions to the nanometer scale, expanding their capabilities to cover visible wavelengths. However, the pursuit of large-scale manufacturing of metasurfaces with customizable functions presents challenges in controlling the dimensions and composition of the constituent dielectric materials. To address these challenges, the combination of block copolymer (BCP) self-assembly and sequential infiltration synthesis (SIS), offers an alternative for fabrication of high-resolution dielectric nanostructures with tailored composition and optical functionalities. However, the absence of metrological techniques capable of providing precise and reliable characterization of the refractive index of dielectric nanostructures persists. This study introduces a hybrid metrology strategy that integrates complementary synchrotron-based traceable X-ray techniques to achieve comprehensive material characterization for the determination of the refractive index on the nanoscale. To establish correlations between material functionality and their underlying chemical, compositional and dimensional properties, TiO2 nanostructures model systems were fabricated by SIS of BCPs. The results from synchrotron-based analyses were integrated into physical models, serving as a validation scheme for laboratory-scale measurements to determine effective refractive indices of the nanoscale dielectric materials.
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Affiliation(s)
- Irdi Murataj
- Advanced
Materials and Life Science Division, Istituto
Nazionale Ricerca Metrologica (INRiM), Strada delle Cacce 91, 10135, Torino, Italy
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy
| | - Angelo Angelini
- Advanced
Materials and Life Science Division, Istituto
Nazionale Ricerca Metrologica (INRiM), Strada delle Cacce 91, 10135, Torino, Italy
| | - Eleonora Cara
- Advanced
Materials and Life Science Division, Istituto
Nazionale Ricerca Metrologica (INRiM), Strada delle Cacce 91, 10135, Torino, Italy
| | - Samuele Porro
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy
| | - Burkhard Beckhoff
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | - Yves Kayser
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | - Philipp Hönicke
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | - Richard Ciesielski
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | - Christian Gollwitzer
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | - Victor Soltwisch
- Physikalisch-Technische
Bundesanstalt (PTB), Abbestraße 2-12, 10587, Berlin, Germany
| | | | | | - Stefano Carignano
- ICCUB, Universitat de Barcelona, Carrer Martí i Franquès,
1, 08028, Barcelona, Spain
| | - Luca Boarino
- Advanced
Materials and Life Science Division, Istituto
Nazionale Ricerca Metrologica (INRiM), Strada delle Cacce 91, 10135, Torino, Italy
| | - Micaela Castellino
- Dipartimento
di Scienza Applicata e Tecnologia, Politecnico
di Torino, Corso Duca degli Abruzzi, 24, 10129, Torino, Italy
| | - Federico Ferrarese Lupi
- Advanced
Materials and Life Science Division, Istituto
Nazionale Ricerca Metrologica (INRiM), Strada delle Cacce 91, 10135, Torino, Italy
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20
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Bartawi EH, Marioara CD, Shaban G, Hatzoglou C, Holmestad R, Ambat R. Atomic Structure of Hardening Precipitates in Al-Mg-Si Alloys: Influence of Minor Additions of Cu and Zn. ACS Nano 2023; 17:24115-24129. [PMID: 38010110 PMCID: PMC10722592 DOI: 10.1021/acsnano.3c09129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/15/2023] [Accepted: 11/16/2023] [Indexed: 11/29/2023]
Abstract
Shifting toward sustainability and low carbon emission necessitates recycling. Aluminum alloys can be recycled from postconsumer scrap with approximately 5% of the energy needed to produce the same amount of primary alloys. However, the presence of certain alloying elements, such as copper and zinc, as impurities in recycled Al-Mg-Si alloys is difficult to avoid. This work has investigated the influence of tiny concentrations of Cu (0.05 wt %) and Zn (0.06 wt %), individually and in combination, on the precipitate crystal structures in Al-Mg-Si alloys in peak aged and overaged conditions. To assess whether such concentrations can affect the hardening precipitate structures, atomic resolution high-angle annular dark-field scanning transmission electron microscopy and atom probe tomography were adopted. The results indicate that low levels of Cu or Zn have a significant influence. Both elements showed a relatively high tendency to incorporate into precipitate structures, where Cu occupies specific atomic sites, creating its own local atomic configurations. However, Zn exhibited distinct behavior through the formation of extended local areas with 2-fold symmetry and mirror planes, not previously observed in precipitates in Al-Mg-Si alloys. Incorporation of Cu and/or Zn will influence the precipitates' electrochemical potential relative to matrix- and precipitate-free zones and thus the corrosion resistance. Furthermore, the presence of Cu/Zn structures (e.g., β'Cu, Q'/C) enhances the thermal stability of these precipitates and, accordingly, the mechanical properties of the material. The results obtained from this work are highly relevant to the topic of recycling of aluminum alloys, where accumulation of certain alloying elements is almost unavoidable; thus, tight compositional control might be critical to avoid quality degradation.
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Affiliation(s)
- Emad H. Bartawi
- Department
of Civil and Mechanical Engineering, Technical
University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Calin D. Marioara
- Materials
and Nanotechnology, SINTEF Industry, Trondheim N-7465, Norway
| | - Ghada Shaban
- Department
of Civil and Mechanical Engineering, Technical
University of Denmark, Kgs. Lyngby 2800, Denmark
| | - Constantinos Hatzoglou
- Department
of Materials Science and Engineering, NTNU,
Norwegian University of Science and Technology, Trondheim 7491, Norway
| | - Randi Holmestad
- Department
of Physics, NTNU, Norwegian University of
Science and Technology, 7491 Trondheim, Norway
| | - Rajan Ambat
- Department
of Civil and Mechanical Engineering, Technical
University of Denmark, Kgs. Lyngby 2800, Denmark
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21
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Patow G, Stefanovski L, Ritter P, Deco G, Kobeleva X. Whole-brain modeling of the differential influences of amyloid-beta and tau in Alzheimer's disease. Alzheimers Res Ther 2023; 15:210. [PMID: 38053164 PMCID: PMC10696890 DOI: 10.1186/s13195-023-01349-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Accepted: 11/07/2023] [Indexed: 12/07/2023]
Abstract
BACKGROUND Alzheimer's disease is a neurodegenerative condition associated with the accumulation of two misfolded proteins, amyloid-beta (A[Formula: see text]) and tau. We study their effect on neuronal activity, with the aim of assessing their individual and combined impact. METHODS We use a whole-brain dynamic model to find the optimal parameters that best describe the effects of A[Formula: see text] and tau on the excitation-inhibition balance of the local nodes. RESULTS We found a clear dominance of A[Formula: see text] over tau in the early disease stages (MCI), while tau dominates over A[Formula: see text] in the latest stages (AD). We identify crucial roles for A[Formula: see text] and tau in complex neuronal dynamics and demonstrate the viability of using regional distributions to define models of large-scale brain function in AD. CONCLUSIONS Our study provides further insight into the dynamics and complex interplay between these two proteins, opening the path for further investigations on biomarkers and candidate therapeutic targets in-silico.
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Affiliation(s)
- Gustavo Patow
- ViRVIG, Universitat de Girona, Girona, Spain.
- Department of Information and Communication Technologies, Universitat Pompeu Fabra, Center for Brain and Cognition, Computational Neuroscience Group, Barcelona, Spain.
| | - Leon Stefanovski
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
- Department of Neurology with Experimental Neurology, Brain Simulation Section, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, 10117, Germany
| | - Petra Ritter
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
- Department of Neurology with Experimental Neurology, Brain Simulation Section, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, 10117, Germany
- Bernstein Center for Computational Neuroscience, Berlin, Germany
- Einstein Center for Neuroscience Berlin, Berlin, Germany
- Einstein Center Digital Future Berlin, Berlin, Germany
| | - Gustavo Deco
- Department of Information and Communication Technologies, Universitat Pompeu Fabra, Center for Brain and Cognition, Computational Neuroscience Group, Barcelona, Spain
- Institució Catalana de la Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Xenia Kobeleva
- Computational Neurology Research Group, Ruhr University Bochum, Bochum, Germany
- German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
- Clinic for Neurology, University Hospital Bonn, Bonn, Germany
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22
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Wan S, Bhati AP, Wade AD, Coveney PV. Ensemble-Based Approaches Ensure Reliability and Reproducibility. J Chem Inf Model 2023; 63:6959-6963. [PMID: 37965695 PMCID: PMC10685440 DOI: 10.1021/acs.jcim.3c01654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Indexed: 11/16/2023]
Abstract
It is increasingly widely recognized that ensemble-based approaches are required to achieve reliability, accuracy, and precision in molecular dynamics calculations. The purpose of the present article is to address a frequently raised question: what is the optimal way to perform ensemble simulation to calculate quantities of interest?
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Affiliation(s)
- Shunzhou Wan
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U. K
| | - Agastya P. Bhati
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U. K
| | - Alexander D. Wade
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U. K
| | - Peter V. Coveney
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U. K
- Advanced
Research Computing Centre, University College
London, London WC1H 0AJ, U.K.
- Institute
for Informatics, Faculty of Science, University
of Amsterdam, 1098XH Amsterdam, The Netherlands
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23
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Henzel J, Bakker K, Najafi M, Zardetto V, Veenstra S, Isabella O, Mazzarella L, Weeber A, Theelen M. Impact of the Current on Reverse Bias Degradation of Perovskite Solar Cells. ACS Appl Energy Mater 2023; 6:11429-11432. [PMID: 38037631 PMCID: PMC10685325 DOI: 10.1021/acsaem.3c02273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/30/2023] [Accepted: 11/06/2023] [Indexed: 12/02/2023]
Abstract
Nonequal current generation in the cells of a photovoltaic module, e.g., due to partial shading, leads to operation in reverse bias. This quickly causes a significant efficiency loss in perovskite solar cells. We report a more quantitative investigation of the reverse bias degradation. Various small reverse biases (negative voltages) were applied for different durations. After normalizing the applied voltages with the breakdown voltages, we found similar dependences of the reverse bias current and the degradation rate. We draw conclusions regarding possible degradation mechanisms and propose a way to increase the comparability of degradation rates for comparing different perovskite solar cells.
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Affiliation(s)
- Jonathan Henzel
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
- Photovoltaic
Materials and Devices, Delft University
of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands
| | - Klaas Bakker
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
| | - Mehrdad Najafi
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
| | - Valerio Zardetto
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
| | - Sjoerd Veenstra
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
| | - Olindo Isabella
- Photovoltaic
Materials and Devices, Delft University
of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands
| | - Luana Mazzarella
- Photovoltaic
Materials and Devices, Delft University
of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands
| | - Arthur Weeber
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
- Photovoltaic
Materials and Devices, Delft University
of Technology, Mekelweg 5, 2628 CD Delft, The Netherlands
| | - Mirjam Theelen
- TNO,
partner in Solliance, High Tech Campus 21, 5656 AE Eindhoven, The Netherlands
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24
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Cucchiaro A, Scherfler A, Corinti D, Berden G, Oomens J, Wurst K, Gust R, Crestoni ME, Kircher B, Cziferszky M. Amino Acids as Chelating Ligands for Platinum: Enhanced Stability in an Aqueous Environment Promoted by Biocompatible Molecules. J Med Chem 2023; 66:15256-15268. [PMID: 37937969 PMCID: PMC10683014 DOI: 10.1021/acs.jmedchem.3c01340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/21/2023] [Accepted: 10/25/2023] [Indexed: 11/09/2023]
Abstract
Platinum-based chemotherapeutics are a cornerstone in the treatment of many malignancies. However, their dose-limiting side effects have rooted efforts to develop new drug candidates with higher selectivity for tumor tissues and less problematic side effects. Here, we developed a cytotoxic platinum(II) complex based on Zeise's salt, containing the nonsteroidal anti-inflammatory drug acetylsalicylic acid and alanine as ligands (4). The previously developed complex (5) displayed high reactivity against sulfur-containing biomolecules; therefore, we put the focus on the optimization of the structure regarding its stability. Different amino acids were used as biocompatible chelating ligands to achieve this aim. Differences in the coordination sphere caused pronounced changes in the stability of Zeise-type precursors 1-3. Coordination with l-Ala through N in the trans position to ethylene showed the most promising results and was employed to stabilize 5. As a result, complex 4 showed improved stability and cytotoxicity, outperforming both 5 and 1.
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Affiliation(s)
- Andrea Cucchiaro
- Institute
of Pharmacy, Pharmaceutical Chemistry, Center for Molecular Biosciences
Innsbruck, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Amelie Scherfler
- Institute
of Pharmacy, Pharmaceutical Chemistry, Center for Molecular Biosciences
Innsbruck, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Davide Corinti
- Dipartimento
di Chimica e Tecnologie del Farmaco, Università
di Roma “La Sapienza”, P. le A. Moro 5, I-00185 Roma, Italy
| | - Giel Berden
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Jos Oomens
- Institute
for Molecules and Materials, FELIX Laboratory, Radboud University, Toernooiveld 7, 6525ED Nijmegen, The Netherlands
| | - Klaus Wurst
- Institute
of General, Inorganic and Theoretical Chemistry, CCB-Centrum for Chemistry
and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Ronald Gust
- Institute
of Pharmacy, Pharmaceutical Chemistry, Center for Molecular Biosciences
Innsbruck, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
| | - Maria Elisa Crestoni
- Dipartimento
di Chimica e Tecnologie del Farmaco, Università
di Roma “La Sapienza”, P. le A. Moro 5, I-00185 Roma, Italy
| | - Brigitte Kircher
- Tyrolean
Cancer Research Institute, Innrain 66, 6020 Innsbruck, Austria
- Immunobiology
and Stem Cell Laboratory, Department of Internal Medicine V (Hematology
and Oncology), Medical University of Innsbruck, Anichstraße 35, 6020 Innsbruck, Austria
| | - Monika Cziferszky
- Institute
of Pharmacy, Pharmaceutical Chemistry, Center for Molecular Biosciences
Innsbruck, University of Innsbruck, Innrain 80-82, A-6020 Innsbruck, Austria
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25
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Wan S, Bhati AP, Coveney PV. Comparison of Equilibrium and Nonequilibrium Approaches for Relative Binding Free Energy Predictions. J Chem Theory Comput 2023; 19:7846-7860. [PMID: 37862058 PMCID: PMC10653111 DOI: 10.1021/acs.jctc.3c00842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Indexed: 10/21/2023]
Abstract
Alchemical relative binding free energy calculations have recently found important applications in drug optimization. A series of congeneric compounds are generated from a preidentified lead compound, and their relative binding affinities to a protein are assessed in order to optimize candidate drugs. While methods based on equilibrium thermodynamics have been extensively studied, an approach based on nonequilibrium methods has recently been reported together with claims of its superiority. However, these claims pay insufficient attention to the basis and reliability of both methods. Here we report a comparative study of the two approaches across a large data set, comprising more than 500 ligand transformations spanning in excess of 300 ligands binding to a set of 14 diverse protein targets. Ensemble methods are essential to quantify the uncertainty in these calculations, not only for the reasons already established in the equilibrium approach but also to ensure that the nonequilibrium calculations reside within their domain of validity. If and only if ensemble methods are applied, we find that the nonequilibrium method can achieve accuracy and precision comparable to those of the equilibrium approach. Compared to the equilibrium method, the nonequilibrium approach can reduce computational costs but introduces higher computational complexity and longer wall clock times. There are, however, cases where the standard length of a nonequilibrium transition is not sufficient, necessitating a complete rerun of the entire set of transitions. This significantly increases the computational cost and proves to be highly inconvenient during large-scale applications. Our findings provide a key set of recommendations that should be adopted for the reliable implementation of nonequilibrium approaches to relative binding free energy calculations in ligand-protein systems.
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Affiliation(s)
- Shunzhou Wan
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - Agastya P. Bhati
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
| | - Peter V. Coveney
- Centre
for Computational Science, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
- Advanced
Research Computing Centre, University College
London, London WC1H 0AJ, U.K.
- Computational
Science Laboratory, Institute for Informatics, Faculty of Science, University of Amsterdam, Amsterdam 1012 WP, Netherlands
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26
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Willis J, Claes R, Zhou Q, Giantomassi M, Rignanese GM, Hautier G, Scanlon DO. Limits to Hole Mobility and Doping in Copper Iodide. Chem Mater 2023; 35:8995-9006. [PMID: 38027540 PMCID: PMC10653089 DOI: 10.1021/acs.chemmater.3c01628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/09/2023] [Accepted: 10/09/2023] [Indexed: 12/01/2023]
Abstract
Over one hundred years have passed since the discovery of the p-type transparent conducting material copper iodide, predating the concept of the "electron-hole" itself. Supercentenarian status notwithstanding, little is understood about the charge transport mechanisms in CuI. Herein, a variety of modeling techniques are used to investigate the charge transport properties of CuI, and limitations to the hole mobility over experimentally achievable carrier concentrations are discussed. Poor dielectric response is responsible for extensive scattering from ionized impurities at degenerately doped carrier concentrations, while phonon scattering is found to dominate at lower carrier concentrations. A phonon-limited hole mobility of 162 cm2 V-1 s-1 is predicted at room temperature. The simulated charge transport properties for CuI are compared to existing experimental data, and the implications for future device performance are discussed. In addition to charge transport calculations, the defect chemistry of CuI is investigated with hybrid functionals, revealing that reasonably localized holes from the copper vacancy are the predominant source of charge carriers. The chalcogens S and Se are investigated as extrinsic dopants, where it is found that despite relatively low defect formation energies, they are unlikely to act as efficient electron acceptors due to the strong localization of holes and subsequent deep transition levels.
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Affiliation(s)
- Joe Willis
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Thomas
Young Centre, University College London, Gower Street, London WC1E 6BT, U.K.
| | - Romain Claes
- UCLouvain,
Institute of Condensed Matter and Nanosciences (IMCN), Chemin des Étoiles 8, Louvain-la-Neuve B-1348, Belgium
| | - Qi Zhou
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Thomas
Young Centre, University College London, Gower Street, London WC1E 6BT, U.K.
| | - Matteo Giantomassi
- UCLouvain,
Institute of Condensed Matter and Nanosciences (IMCN), Chemin des Étoiles 8, Louvain-la-Neuve B-1348, Belgium
| | - Gian-Marco Rignanese
- UCLouvain,
Institute of Condensed Matter and Nanosciences (IMCN), Chemin des Étoiles 8, Louvain-la-Neuve B-1348, Belgium
| | - Geoffroy Hautier
- UCLouvain,
Institute of Condensed Matter and Nanosciences (IMCN), Chemin des Étoiles 8, Louvain-la-Neuve B-1348, Belgium
- Thayer
School of Engineering, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - David O. Scanlon
- Department
of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K.
- Thomas
Young Centre, University College London, Gower Street, London WC1E 6BT, U.K.
- School
of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.
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27
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Fallarini S, Cerofolini L, Salobehaj M, Rizzo D, Gheorghita GR, Licciardi G, Capialbi DE, Zullo V, Sodini A, Nativi C, Fragai M. Site-Selective Functionalized PD-1 Mutant for a Modular Immunological Activity against Cancer Cells. Biomacromolecules 2023; 24:5428-5437. [PMID: 37902625 PMCID: PMC10646970 DOI: 10.1021/acs.biomac.3c00893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/31/2023]
Abstract
Targeting immune checkpoints is a well-established strategy in cancer therapy, and antibodies blocking PD-1/PD-L1 interactions to restore the immunological activity against cancer cells have been clinically validated. High-affinity mutants of the PD-1 ectodomain have recently been proposed as an alternative to antibodies to target PD-L1 on cancer cells, shedding new light on this research area. In this dynamic scenario, the PD-1 mutant, here reported, largely expands the chemical space of nonantibody and nonsmall-molecule inhibitor therapeutics that can be used to target cancer cells overexpressing PD-L1 receptors. The polyethylene glycol moieties and the immune response-stimulating carbohydrates, used as site-selective tags, represent the proof of concept for future applications.
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Affiliation(s)
- Silvia Fallarini
- Department
of Pharmaceutical Sciences, DSF, University
of Piemonte Orientale, Largo Donegani 2, Novara (NO) 28100, Italy
| | - Linda Cerofolini
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
| | - Maria Salobehaj
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
| | - Domenico Rizzo
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
| | - Giulia Roxana Gheorghita
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
- Giotto
Biotech, S.R.L, Via Madonna
del Piano 6, Sesto Fiorentino (FI) 50019, Italy
| | - Giulia Licciardi
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
| | - Daniela Eloisa Capialbi
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
| | - Valerio Zullo
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
| | - Andrea Sodini
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
| | - Cristina Nativi
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
| | - Marco Fragai
- Department
of Chemistry, DICUS, University of Florence, Via della Lastruccia 3,13, Sesto Fiorentino (FI) 50019, Italy
- CeRM/CIRMMP, University of Florence, Via L. Sacconi 6, Sesto
Fiorentino (FI) 50019, Italy
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28
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Nicolaidou E, Parker AW, Sazanovich IV, Towrie M, Hayes SC. Unraveling Excited State Dynamics of a Single-Stranded DNA-Assembled Conjugated Polyelectrolyte. J Phys Chem Lett 2023; 14:9794-9803. [PMID: 37883808 PMCID: PMC10641883 DOI: 10.1021/acs.jpclett.3c01803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Revised: 10/21/2023] [Accepted: 10/23/2023] [Indexed: 10/28/2023]
Abstract
Conformational templating of conjugated polyelectrolytes with single-stranded DNAs (ssDNAs) has the prospect of tailoring excited state dynamics for specific optoelectronic applications. We use ultrafast time-resolved infrared spectroscopy to study the photophysics of a cationic polythiophene assembled with different ssDNAs, inducing distinct conformations (flexible disordered structures vs more rigid complexes with increased backbone planarity). Intrachain polarons are always produced upon selective excitation of the polymer, the extent being dependent on backbone torsional order. Polaron formation and decay were monitored through evolution of IR-active vibrational modes that interfere with mid-IR polaron electronic absorption giving rise to Fano-antiresonances. Selective UV excitation of ssDNAs revealed that stacking interactions between thiophene rings and nucleic acid bases can promote the formation of an intermolecular charge transfer complex. The findings inform designers of functional conjugated polymers by identifying that involvement of the scaffold in the photophysics needs to be considered when developing such structures for optoelectronic applications.
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Affiliation(s)
- Eliana Nicolaidou
- Department
of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Anthony W. Parker
- Central
Laser Facility, Research Complex at Harwell, Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, U.K.
| | - Igor V. Sazanovich
- Central
Laser Facility, Research Complex at Harwell, Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, U.K.
| | - Michael Towrie
- Central
Laser Facility, Research Complex at Harwell, Science and Technology
Facilities Council, Rutherford Appleton Laboratory, Harwell Oxford, Didcot, Oxfordshire OX11 0QX, U.K.
| | - Sophia C. Hayes
- Department
of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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29
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Polák M, Palasser M, Kádek A, Kavan D, Wootton CA, Delsuc MA, Breuker K, Novák P, van Agthoven MA. Top-Down Proteoform Analysis by 2D MS with Quadrupolar Detection. Anal Chem 2023; 95:16123-16130. [PMID: 37877738 PMCID: PMC10633810 DOI: 10.1021/acs.analchem.3c02225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 09/26/2023] [Accepted: 10/04/2023] [Indexed: 10/26/2023]
Abstract
Two-dimensional mass spectrometry (2D MS) is a multiplexed tandem mass spectrometry method that does not rely on ion isolation to correlate the precursor and fragment ions. On a Fourier transform ion cyclotron resonance mass spectrometer (FT-ICR MS), 2D MS instead uses the modulation of precursor ion radii inside the ICR cell before fragmentation and yields 2D mass spectra that show the fragmentation patterns of all the analytes. In this study, we perform 2D MS for the first time with quadrupolar detection in a dynamically harmonized ICR cell. We discuss the advantages of quadrupolar detection in 2D MS and how we adapted existing data processing techniques for accurate frequency-to-mass conversion. We apply 2D MS with quadrupolar detection to the top-down analysis of covalently labeled ubiquitin with ECD fragmentation, and we develop a workflow for label-free relative quantification of biomolecule isoforms in 2D MS.
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Affiliation(s)
- Marek Polák
- Institute
of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
- Faculty
of Science, Charles University, Prague 12843, Czech Republic
| | - Michael Palasser
- Center
for Chemistry and Biomedicine, University
of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Alan Kádek
- Institute
of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
| | - Daniel Kavan
- Institute
of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
- Faculty
of Science, Charles University, Prague 12843, Czech Republic
| | | | - Marc-André Delsuc
- Institut
de Génétique et de Biologie Moléculaire et Cellulaire,
INSERM, U596, CNRS, UMR7104, Université de Strasbourg, 1 rue Laurent Fries, 67404 Illkirch-Graffenstaden, France
| | - Kathrin Breuker
- Center
for Chemistry and Biomedicine, University
of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
| | - Petr Novák
- Institute
of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
- Faculty
of Science, Charles University, Prague 12843, Czech Republic
| | - Maria A. van Agthoven
- Institute
of Microbiology of the Czech Academy of Sciences, Prague 14220, Czech Republic
- Center
for Chemistry and Biomedicine, University
of Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria
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30
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Mäkelä A, Minunno F, Kujala H, Kosenius AK, Heikkinen RK, Junttila V, Peltoniemi M, Forsius M. Effect of forest management choices on carbon sequestration and biodiversity at national scale. Ambio 2023; 52:1737-1756. [PMID: 37535310 PMCID: PMC10562327 DOI: 10.1007/s13280-023-01899-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 04/26/2023] [Accepted: 06/16/2023] [Indexed: 08/04/2023]
Abstract
Forest management methods and harvest intensities influence wood production, carbon sequestration and biodiversity. We devised different management scenarios by means of stakeholder analysis and incorporated them in the forest growth simulator PREBAS. To analyse impacts of harvest intensity, we used constraints on total harvest: business as usual, low harvest, intensive harvest and no harvest. We carried out simulations on a wall-to-wall grid in Finland until 2050. Our objectives were to (1) test how the management scenarios differed in their projections, (2) analyse the potential wood production, carbon sequestration and biodiversity under the different harvest levels, and (3) compare different options of allocating the scenarios and protected areas. Harvest level was key to carbon stocks and fluxes regardless of management actions and moderate changes in proportion of strictly protected forest. In contrast, biodiversity was more dependent on other management variables than harvesting levels, and relatively independent of carbon stocks and fluxes.
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Affiliation(s)
- Annikki Mäkelä
- Institute for Atmospheric and Earth System Research (INAR) & Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Francesco Minunno
- Institute for Atmospheric and Earth System Research (INAR) & Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, Finland
| | - Heini Kujala
- Finnish Natural History Museum, University of Helsinki, Helsinki, Finland
| | - Anna-Kaisa Kosenius
- Department of Economics and Management, University of Helsinki, Helsinki, Finland
| | | | | | | | | |
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31
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Di Mari G, Spadaro MC, Salutari F, Arbiol J, Bruno L, Mineo G, Bruno E, Strano V, Mirabella S. Low-Cost, High-Yield Zinc Oxide-Based Nanostars for Alkaline Overall Water Splitting. ACS Omega 2023; 8:37023-37031. [PMID: 37841157 PMCID: PMC10568701 DOI: 10.1021/acsomega.3c03958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 09/08/2023] [Indexed: 10/17/2023]
Abstract
The investigation of high-efficiency and sustainable electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline media is critical for renewable energy technologies. Here, we report a low-cost and high-yield method to obtain ZnOHF-ZnO-based 2D nanostars (NSs) by means of chemical bath deposition (CBD). The obtained NSs, cast onto graphene paper substrates, were used as active materials for the development of a full water splitting cell. For the HER, NSs were decorated with an ultralow amount of Pt nanoparticles (11.2 μg cm-2), demonstrating an overpotential of 181 mV at a current density of 10 mA cm-2. The intrinsic activity of Pt was optimized, thanks to the ZnO supporting nanostructures, as outlined by the mass activity of Pt (0.9 mA mgPt-1) and its turnover frequency (0.27 s-1 for a Pt loading of 11.2 μg cm-2). For the OER, bare NSs showed a remarkable result of 355 mV at 10 mA cm-2 in alkaline media. Pt-decorated and bare NSs were used as the cathode and anode, respectively, for alkaline electrochemical water splitting, assessing a stable overpotential of 1.7 V at a current density of 10 mA cm-2. The reported data pave the way toward large-scale production of low-cost electrocatalysts for green hydrogen production.
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Affiliation(s)
- Gisella
Maria Di Mari
- Dipartimento
di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, via S. Sofia 64, 95123Catania, Italy
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
| | - Maria Chiara Spadaro
- Dipartimento
SIMAU, Università Politecnica delle
Marche, Piazza Roma 22, 60121 Ancona, Italy
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, 08193 Bellaterra (Barcelona), Catalonia, Spain
| | - Francesco Salutari
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, 08193 Bellaterra (Barcelona), Catalonia, Spain
| | - Jordi Arbiol
- Catalan
Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, 08193 Bellaterra (Barcelona), Catalonia, Spain
- ICREA, Pg. Lluís Companys 23, 08010Barcelona, Catalonia, Spain
| | - Luca Bruno
- Dipartimento
di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, via S. Sofia 64, 95123Catania, Italy
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
| | - Giacometta Mineo
- Dipartimento
di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, via S. Sofia 64, 95123Catania, Italy
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
| | - Elena Bruno
- Dipartimento
di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, via S. Sofia 64, 95123Catania, Italy
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
| | - Vincenzina Strano
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
| | - Salvo Mirabella
- Dipartimento
di Fisica e Astronomia “Ettore Majorana”, Università degli Studi di Catania, via S. Sofia 64, 95123Catania, Italy
- CNR-IMM,
Catania (University) Unit, via S. Sofia 64, 95123 Catania, Italy
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32
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Boeije Y, Van Gompel WTM, Zhang Y, Ghosh P, Zelewski SJ, Maufort A, Roose B, Ooi ZY, Chowdhury R, Devroey I, Lenaers S, Tew A, Dai L, Dey K, Salway H, Friend RH, Sirringhaus H, Lutsen L, Vanderzande D, Rao A, Stranks SD. Tailoring Interlayer Charge Transfer Dynamics in 2D Perovskites with Electroactive Spacer Molecules. J Am Chem Soc 2023; 145:21330-21343. [PMID: 37738152 PMCID: PMC10557141 DOI: 10.1021/jacs.3c05974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Indexed: 09/24/2023]
Abstract
The family of hybrid organic-inorganic lead-halide perovskites are the subject of intense interest for optoelectronic applications, from light-emitting diodes to photovoltaics to X-ray detectors. Due to the inert nature of most organic molecules, the inorganic sublattice generally dominates the electronic structure and therefore the optoelectronic properties of perovskites. Here, we use optically and electronically active carbazole-based Cz-Ci molecules, where Ci indicates an alkylammonium chain and i indicates the number of CH2 units in the chain, varying from 3 to 5, as cations in the two-dimensional (2D) perovskite structure. By investigating the photophysics and charge transport characteristics of (Cz-Ci)2PbI4, we demonstrate a tunable electronic coupling between the inorganic lead-halide and organic layers. The strongest interlayer electronic coupling was found for (Cz-C3)2PbI4, where photothermal deflection spectroscopy results remarkably reveal an organic-inorganic charge transfer state. Ultrafast transient absorption spectroscopy measurements demonstrate ultrafast hole transfer from the photoexcited lead-halide layer to the Cz-Ci molecules, the efficiency of which increases by varying the chain length from i = 5 to i = 3. The charge transfer results in long-lived carriers (10-100 ns) and quenched emission, in stark contrast to the fast (sub-ns) and efficient radiative decay of bound excitons in the more conventional 2D perovskite (PEA)2PbI4, in which phenylethylammonium (PEA) acts as an inert spacer. Electrical charge transport measurements further support enhanced interlayer coupling, showing increased out-of-plane carrier mobility from i = 5 to i = 3. This study paves the way for the rational design of 2D perovskites with combined inorganic-organic electronic properties through the wide range of functionalities available in the world of organics.
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Affiliation(s)
- Yorrick Boeije
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Wouter T. M. Van Gompel
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Youcheng Zhang
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
- Cambridge
Graphene Centre, Department of Engineering, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0FA, U.K.
| | - Pratyush Ghosh
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Szymon J. Zelewski
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
- Department
of Semiconductor Materials Engineering, Faculty of Fundamental Problems
of Technology, Wrocław University
of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Arthur Maufort
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Bart Roose
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
| | - Zher Ying Ooi
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
| | - Rituparno Chowdhury
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Ilan Devroey
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Stijn Lenaers
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Alasdair Tew
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Linjie Dai
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Krishanu Dey
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Hayden Salway
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
| | - Richard H. Friend
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Henning Sirringhaus
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Laurence Lutsen
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Dirk Vanderzande
- Institute
for Materials Research (IMO-IMOMEC), Hybrid Materials Design (HyMaD), Hasselt University, Martelarenlaan 42, B-3500 Hasselt, Belgium
| | - Akshay Rao
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
| | - Samuel D. Stranks
- Department
of Chemical Engineering and Biotechnology, University of Cambridge, Philippa Fawcett Drive, Cambridge CB3 0AS, U.K.
- Department
of Physics, Cavendish Laboratory, University
of Cambridge, JJ Thomson
Avenue, Cambridge CB3 0HE, U.K.
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33
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Bell DM, Zhang J, Top J, Bogler S, Surdu M, Slowik JG, Prevot ASH, El Haddad I. Sensitivity Constraints of Extractive Electrospray for a Model System and Secondary Organic Aerosol. Anal Chem 2023; 95:13788-13795. [PMID: 37656668 PMCID: PMC10515109 DOI: 10.1021/acs.analchem.3c00441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 08/11/2023] [Indexed: 09/03/2023]
Abstract
The quantification of an aerosol chemical composition is complicated by the uncertainty in the sensitivity of each species detected. Soft-ionization response factors can vary widely from molecule to molecule. Here, we have employed a method to separate molecules by their volatility through systematic evaporation with a thermal denuder (TD). The fraction remaining after evaporation is compared between an extractive electrospray ionization time-of-flight mass spectrometer (EESI-TOF) and a scanning mobility particle sizer (SMPS), which provides a comparison between a quantified mass loss by the SMPS and the signal loss in the EESI-TOF. The sensitivity of the EESI-TOF is determined for both a simplified complex mixture (PEG-300) and also for a complex mixture of α-pinene secondary organic aerosol (SOA). For PEG-300, separation is possible on a molecule-by-molecule level with the TD and provides insights into the molecule-dependent sensitivity of the EESI-TOF, showing a higher sensitivity toward the most volatile molecule. For α-pinene SOA, sensitivity determination for specific classes is possible because of the number of molecular formula observed by the EESI-TOF. These classes are separated by their volatility and are broken down into monomers (O3-5,6-7,8+), dimers (O4-7,8+), and higher order oligomers (e.g., trimers and tetramers). Here, we show that the EESI-TOF initially measures 60.1% monomers, 32.7% dimers, and 7.2% trimers and tetramers in α-pinene SOA, but after sensitivity correction, the distribution of SOA is 37.4% monomers, 56.1% dimers, and 6.4% trimers and tetramers. These results provide a path forward for the quantification of aerosol components with the EESI-TOF in other applications and potentially for atmospheric measurements.
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Affiliation(s)
- David M. Bell
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Jun Zhang
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Jens Top
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Sophie Bogler
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Mihnea Surdu
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Jay G. Slowik
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Andre S. H. Prevot
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
| | - Imad El Haddad
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, Villigen 5232, Switzerland
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34
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Guo H, Jiménez-Sánchez MD, Michel EG, Martínez-Galera AJ, Gómez-Rodríguez JM. Aperiodic Modulation of Graphene Driven by Oxygen-Induced Reconstruction of Rh(110). J Phys Chem C Nanomater Interfaces 2023; 127:17930-17938. [PMID: 37744964 PMCID: PMC10513088 DOI: 10.1021/acs.jpcc.3c02643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 08/04/2023] [Indexed: 09/26/2023]
Abstract
Artificial nanostructuring of graphene has served as a platform to induce variations in its structural and electronic properties, fostering the experimental observation of a wide and fascinating phenomenology. Here, we present an approach to graphene tuning, based on Rh(110) surface reconstruction induced by oxygen atoms intercalation. The resulting nanostructured graphene has been characterized by scanning tunneling microscopy (STM) complemented by low-energy electron microscopy (LEEM), micro low-energy electron diffraction (μ-LEED), micro angle-resolved photoemission spectroscopy (μ-ARPES), and micro X-ray photoelectron spectroscopy (μ-XPS) measurements under ultrahigh vacuum (UHV) conditions at room temperature (RT). It is found that by fine-tuning the O2 exposure amount, a mixture of missing row surface reconstructions of the metal surface below the graphene layer can be induced. This atomic rearrangement under the graphene layer results in aperiodic patterning of the two-dimensional (2D) material. The electronic structure of the resulting nanostructured graphene is dominated by a linear dispersion of the Dirac quasiparticles, characteristic of its free-standing state but with a p-doping character. The local effects of the underlying missing rows on the interfacial chemistry and on the quasiparticle scattering processes in graphene are studied using atomically resolved STM images. The possibilities offered by this nanostructuring approach, which consists in inducing surface reconstructions under graphene, could provide a novel tuning strategy for this 2D material.
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Affiliation(s)
- Haojie Guo
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
| | | | - Enrique G. Michel
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Instituto
Nicolás Cabrera, Universidad Autónoma
de Madrid, E-28049 Madrid, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
| | - Antonio J. Martínez-Galera
- Instituto
Nicolás Cabrera, Universidad Autónoma
de Madrid, E-28049 Madrid, Spain
- Departamento
de Física de Materiales, Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
| | - José M. Gómez-Rodríguez
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
- Instituto
Nicolás Cabrera, Universidad Autónoma
de Madrid, E-28049 Madrid, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, E-28049 Madrid, Spain
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35
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Cremer J, Medrano Sandonas L, Tkatchenko A, Clevert DA, De Fabritiis G. Equivariant Graph Neural Networks for Toxicity Prediction. Chem Res Toxicol 2023; 36. [PMID: 37690056 PMCID: PMC10583285 DOI: 10.1021/acs.chemrestox.3c00032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Indexed: 09/12/2023]
Abstract
Predictive modeling of toxicity is a crucial step in the drug discovery pipeline. It can help filter out molecules with a high probability of failing in the early stages of de novo drug design. Thus, several machine learning (ML) models have been developed to predict the toxicity of molecules by combining classical ML techniques or deep neural networks with well-known molecular representations such as fingerprints or 2D graphs. But the more natural, accurate representation of molecules is expected to be defined in physical 3D space like in ab initio methods. Recent studies successfully used equivariant graph neural networks (EGNNs) for representation learning based on 3D structures to predict quantum-mechanical properties of molecules. Inspired by this, we investigated the performance of EGNNs to construct reliable ML models for toxicity prediction. We used the equivariant transformer (ET) model in TorchMD-NET for this. Eleven toxicity data sets taken from MoleculeNet, TDCommons, and ToxBenchmark have been considered to evaluate the capability of ET for toxicity prediction. Our results show that ET adequately learns 3D representations of molecules that can successfully correlate with toxicity activity, achieving good accuracies on most data sets comparable to state-of-the-art models. We also test a physicochemical property, namely, the total energy of a molecule, to inform the toxicity prediction with a physical prior. However, our work suggests that these two properties can not be related. We also provide an attention weight analysis for helping to understand the toxicity prediction in 3D space and thus increase the explainability of the ML model. In summary, our findings offer promising insights considering 3D geometry information via EGNNs and provide a straightforward way to integrate molecular conformers into ML-based pipelines for predicting and investigating toxicity prediction in physical space. We expect that in the future, especially for larger, more diverse data sets, EGNNs will be an essential tool in this domain.
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Affiliation(s)
- Julian Cremer
- Computational
Science Laboratory, Universitat Pompeu Fabra,
Barcelona Biomedical Research Park (PRBB), Carrer Dr. Aiguader 88, 08003 Barcelona, Spain
- Machine
Learning Research, Pfizer Worldwide Research
Development and Medical, Linkstr. 10, 10785 Berlin, Germany
| | - Leonardo Medrano Sandonas
- Department
of Physics and Materials Science, University
of Luxembourg, L-1511 Luxembourg City, Luxembourg
| | - Alexandre Tkatchenko
- Department
of Physics and Materials Science, University
of Luxembourg, L-1511 Luxembourg City, Luxembourg
| | - Djork-Arné Clevert
- Machine
Learning Research, Pfizer Worldwide Research
Development and Medical, Linkstr. 10, 10785 Berlin, Germany
| | - Gianni De Fabritiis
- Computational
Science Laboratory, Universitat Pompeu Fabra,
Barcelona Biomedical Research Park (PRBB), Carrer Dr. Aiguader 88, 08003 Barcelona, Spain
- ICREA, Passeig Lluis Companys 23, 08010 Barcelona, Spain
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36
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Ertel D, Busto D, Makos I, Schmoll M, Benda J, Ahmadi H, Moioli M, Frassetto F, Poletto L, Schröter CD, Pfeifer T, Moshammer R, Mašín Z, Patchkovskii S, Sansone G. Influence of nuclear dynamics on molecular attosecond photoelectron interferometry. Sci Adv 2023; 9:eadh7747. [PMID: 37647394 PMCID: PMC10468127 DOI: 10.1126/sciadv.adh7747] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Accepted: 07/19/2023] [Indexed: 09/01/2023]
Abstract
In extreme ultraviolet spectroscopy, the photoionization process occurring in a molecule due to the absorption of a single photon can trigger an ultrafast nuclear motion in the cation. Taking advantage of attosecond photoelectron interferometry, where the absorption of the extreme ultraviolet photon is accompanied by the exchange of an additional infrared quantum of light, one can investigate the influence of nuclear dynamics by monitoring the characteristics of the photoelectron spectra generated by the two-color field. Here, we show that attosecond photoelectron interferometry is sensitive to the nuclear response by measuring the two-color photoionization spectra in a mixture of methane (CH4) and deuteromethane (CD4). The effect of the different nuclear evolution in the two isotopologues manifests itself in the modification of the amplitude and contrast of the oscillations of the photoelectron peaks. Our work indicates that nuclear dynamics can affect the coherence properties of the electronic wave packet emitted by photoionization on a time scale as short as a few femtoseconds.
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Affiliation(s)
- Dominik Ertel
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - David Busto
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
- Department of Physics, Lund University, PO Box 118, SE-221 00 Lund, Sweden
| | - Ioannis Makos
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Marvin Schmoll
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Jakub Benda
- Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, V Holešovǐkách 2, 180 00, Prague 8, Czech Republic
| | - Hamed Ahmadi
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Matteo Moioli
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
| | - Fabio Frassetto
- Istituto di Fotonica e Nanotecnologie, CNR, 35131 Padova, Italy
| | - Luca Poletto
- Istituto di Fotonica e Nanotecnologie, CNR, 35131 Padova, Italy
| | | | - Thomas Pfeifer
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | | | - Zdeněk Mašín
- Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University, V Holešovǐkách 2, 180 00, Prague 8, Czech Republic
| | | | - Giuseppe Sansone
- Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Straße 3, 79104 Freiburg, Germany
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37
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Birklbauer MJ, Matzinger M, Müller F, Mechtler K, Dorfer V. MS Annika 2.0 Identifies Cross-Linked Peptides in MS2-MS3-Based Workflows at High Sensitivity and Specificity. J Proteome Res 2023; 22:3009-3021. [PMID: 37566781 PMCID: PMC10476269 DOI: 10.1021/acs.jproteome.3c00325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Indexed: 08/13/2023]
Abstract
Cross-linking mass spectrometry has become a powerful tool for the identification of protein-protein interactions and for gaining insight into the structures of proteins. We previously published MS Annika, a cross-linking search engine which can accurately identify cross-linked peptides in MS2 spectra from a variety of different MS-cleavable cross-linkers. In this publication, we present MS Annika 2.0, an updated version implementing a new search algorithm that, in addition to MS2 level, only supports the processing of data from MS2-MS3-based approaches for the identification of peptides from MS3 spectra, and introduces a novel scoring function for peptides identified across multiple MS stages. Detected cross-links are validated by estimating the false discovery rate (FDR) using a target-decoy approach. We evaluated the MS3-search-capabilities of MS Annika 2.0 on five different datasets covering a variety of experimental approaches and compared it to XlinkX and MaXLinker, two other cross-linking search engines. We show that MS Annika detects up to 4 times more true unique cross-links while simultaneously yielding less false positive hits and therefore a more accurate FDR estimation than the other two search engines. All mass spectrometry proteomics data along with result files have been deposited to the ProteomeXchange consortium via the PRIDE partner repository with the dataset identifier PXD041955.
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Affiliation(s)
- Micha J. Birklbauer
- Bioinformatics
Research Group, University of Applied Sciences
Upper Austria, Softwarepark
11, 4232 Hagenberg, Austria
| | - Manuel Matzinger
- Research
Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Fränze Müller
- Research
Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
| | - Karl Mechtler
- Research
Institute of Molecular Pathology (IMP), Vienna BioCenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria
- Institute
of Molecular Biotechnology (IMBA), Austrian Academy of Sciences, Vienna
BioCenter (VBC), Dr.
Bohr-Gasse 3, 1030 Vienna, Austria
- Gregor
Mendel Institute (GMI), Austrian Academy of Sciences, Vienna BioCenter
(VBC), Dr. Bohr-Gasse
3, 1030 Vienna, Austria
| | - Viktoria Dorfer
- Bioinformatics
Research Group, University of Applied Sciences
Upper Austria, Softwarepark
11, 4232 Hagenberg, Austria
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38
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Amado PSM, Lopes S, Brás EM, Paixão JA, Takano MA, Abe M, Fausto R, Cristiano MLS. Molecular and Crystal Structure, Spectroscopy, and Photochemistry of a Dispiro Compound Bearing the Tetraoxane Pharmacophore. Chemistry 2023; 29:e202301315. [PMID: 37343198 DOI: 10.1002/chem.202301315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
The molecular structure and photochemistry of dispiro[cyclohexane-1,3'-[1,2,4,5]tetraoxane-6',2''-tricyclo[3.3.1.13,7 ]decan]-4-one (TX), an antiparasitic 1,2,4,5-tetraoxane was investigated using matrix isolation IR and EPR spectroscopies, together with quantum chemical calculations undertaken at the DFT(B3LYP)/6-311++G(3df,3pd) level of theory, with and without Grimme's dispersion correction. Photolysis of the matrix-isolated TX, induced by in situ broadband (λ>235 nm) or narrowband (λ in the range 220-263 nm) irradiation, led to new bands in the infrared spectrum that could be ascribed to two distinct photoproducts, oxepane-2,5-dione, and 4-oxohomoadamantan-5-one. Our studies show that these photoproducts result from initial photoinduced cleavage of an O-O bond, with the formation of an oxygen-centered diradical that regioselectivity rearranges to a more stable (secondary carbon-centered)/(oxygen-centered) diradical, yielding the final products. Formation of the diradical species was confirmed by EPR measurements, upon photolysis of the compound at λ=266 nm, in acetonitrile ice (T=10-80 K). Single-crystal X-ray diffraction (XRD) studies demonstrated that the TX molecule adopts nearly the same conformation in the crystal and matrix-isolation conditions, revealing that the intermolecular interactions in the TX crystal are weak. This result is in keeping with observed similarities between the infrared spectrum of the crystalline material and that of matrix-isolated TX. The detailed structural, vibrational, and photochemical data reported here appear relevant to the practical uses of TX in medicinal chemistry, considering its efficient and broad parasiticidal properties.
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Affiliation(s)
- Patrícia S M Amado
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
- Department of Chemistry and Pharmacy Faculty of Sciences and Technology, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
| | - Susy Lopes
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - Elisa M Brás
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
| | - José A Paixão
- CFisUC, Department of Physics, University of Coimbra, 3004-516, Coimbra, Portugal
| | - Ma-Aya Takano
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2) Higashi-Hiroshima, Hiroshima, 739-0046, Japan
| | - Manabu Abe
- Department of Chemistry Graduate School of Advanced Science and Engineering, Hiroshima University Higashi-Hiroshima, Hiroshima, 739-8526, Japan
- International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2) Higashi-Hiroshima, Hiroshima, 739-0046, Japan
| | - Rui Fausto
- CQC-IMS, Department of Chemistry, University of Coimbra, 3004-535, Coimbra, Portugal
- Faculty of Sciences and Letters, Department of Physics, Istanbul Kultur University Ataköy Campus, Bakirköy, 34156, Istanbul, Turkey
| | - Maria L S Cristiano
- Center of Marine Sciences, CCMAR, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
- Department of Chemistry and Pharmacy Faculty of Sciences and Technology, Gambelas Campus, University of Algarve UAlg, 8005-139, Faro, Portugal
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39
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Sojková M, Píš I, Hrdá J, Vojteková T, Pribusová Slušná L, Vegso K, Siffalovic P, Nadazdy P, Dobročka E, Krbal M, Fons PJ, Munnik F, Magnano E, Hulman M, Bondino F. Lithium-Induced Reorientation of Few-Layer MoS 2 Films. Chem Mater 2023; 35:6246-6257. [PMID: 37637012 PMCID: PMC10448679 DOI: 10.1021/acs.chemmater.3c00669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 07/18/2023] [Indexed: 08/29/2023]
Abstract
Molybdenum disulfide (MoS2) few-layer films have gained considerable attention for their possible applications in electronics and optics and also as a promising material for energy conversion and storage. Intercalating alkali metals, such as lithium, offers the opportunity to engineer the electronic properties of MoS2. However, the influence of lithium on the growth of MoS2 layers has not been fully explored. Here, we have studied how lithium affects the structural and optical properties of the MoS2 few-layer films prepared using a new method based on one-zone sulfurization with Li2S as a source of lithium. This method enables incorporation of Li into octahedral and tetrahedral sites of the already prepared MoS2 films or during MoS2 formation. Our results discover an important effect of lithium promoting the epitaxial growth and horizontal alignment of the films. Moreover, we have observed a vertical-to-horizontal reorientation in vertically aligned MoS2 films upon lithiation. The measurements show long-term stability and preserved chemical composition of the horizontally aligned Li-doped MoS2.
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Affiliation(s)
- Michaela Sojková
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Igor Píš
- IOM-CNR,
Istituto Officina dei Materiali, S.S. 14 km − 163.5, Basovizza, Trieste 34149, Italy
| | - Jana Hrdá
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Tatiana Vojteková
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Lenka Pribusová Slušná
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Karol Vegso
- Institute
of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
- Centre
for Advanced Materials Application (CEMEA), Slovak Academy of Sciences, Dúbravská cesta 5807/9, 84511 Bratislava, Slovakia
| | - Peter Siffalovic
- Institute
of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia
- Centre
for Advanced Materials Application (CEMEA), Slovak Academy of Sciences, Dúbravská cesta 5807/9, 84511 Bratislava, Slovakia
| | - Peter Nadazdy
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Edmund Dobročka
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Miloš Krbal
- Center
of Materials and Nanotechnologies (CEMNAT), Faculty of Chemical Technology, University of Pardubice, Legions Square 565, 530 02 Pardubice, Czech Republic
| | - Paul J. Fons
- Department
of Electronics and Electrical Engineering, Faculty of Science and
Technology, Keio University, 223-8522 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan
- Device
Technology Research Institute, National Institute of Advanced Industrial
Science and Technology, 1-1-1 Umezono, Tsukuba, 305-8568 Ibaraki, Japan
| | - Frans Munnik
- Helmholtz-Zentrum
Dresden-Rossendorf, e.V. Bautzner Landstrasse 400, D-01328 Dresden, Germany
| | - Elena Magnano
- IOM-CNR,
Istituto Officina dei Materiali, S.S. 14 km − 163.5, Basovizza, Trieste 34149, Italy
- Department
of Physics, University of Johannesburg, Auckland Park, PO Box 524, 2006 Johannesburg, South Africa
| | - Martin Hulman
- Institute
of Electrical Engineering, SAS, Dúbravská cesta 9, 841 04 Bratislava, Slovakia
| | - Federica Bondino
- IOM-CNR,
Istituto Officina dei Materiali, S.S. 14 km − 163.5, Basovizza, Trieste 34149, Italy
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40
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Gabalski I, Allum F, Seidu I, Britton M, Brenner G, Bromberger H, Brouard M, Bucksbaum PH, Burt M, Cryan JP, Driver T, Ekanayake N, Erk B, Garg D, Gougoula E, Heathcote D, Hockett P, Holland DMP, Howard AJ, Kumar S, Lee JWL, Li S, McManus J, Mikosch J, Milesevic D, Minns RS, Neville S, Atia-Tul-Noor, Papadopoulou CC, Passow C, Razmus WO, Röder A, Rouzée A, Simao A, Unwin J, Vallance C, Walmsley T, Wang J, Rolles D, Stolow A, Schuurman MS, Forbes R. Time-Resolved X-ray Photoelectron Spectroscopy: Ultrafast Dynamics in CS 2 Probed at the S 2p Edge. J Phys Chem Lett 2023; 14:7126-7133. [PMID: 37534743 PMCID: PMC10431593 DOI: 10.1021/acs.jpclett.3c01447] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Accepted: 07/17/2023] [Indexed: 08/04/2023]
Abstract
Recent developments in X-ray free-electron lasers have enabled a novel site-selective probe of coupled nuclear and electronic dynamics in photoexcited molecules, time-resolved X-ray photoelectron spectroscopy (TRXPS). We present results from a joint experimental and theoretical TRXPS study of the well-characterized ultraviolet photodissociation of CS2, a prototypical system for understanding non-adiabatic dynamics. These results demonstrate that the sulfur 2p binding energy is sensitive to changes in the nuclear structure following photoexcitation, which ultimately leads to dissociation into CS and S photoproducts. We are able to assign the main X-ray spectroscopic features to the CS and S products via comparison to a first-principles determination of the TRXPS based on ab initio multiple-spawning simulations. Our results demonstrate the use of TRXPS as a local probe of complex ultrafast photodissociation dynamics involving multimodal vibrational coupling, nonradiative transitions between electronic states, and multiple final product channels.
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Affiliation(s)
- Ian Gabalski
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Felix Allum
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Linac
Coherent Light Source, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Issaka Seidu
- National
Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Mathew Britton
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
| | - Günter Brenner
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Mark Brouard
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Philip H. Bucksbaum
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
- Department
of Physics, Stanford University, Stanford, California 94305, United States
| | - Michael Burt
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - James P. Cryan
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Linac
Coherent Light Source, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
| | - Taran Driver
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Linac
Coherent Light Source, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
| | - Nagitha Ekanayake
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Benjamin Erk
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Diksha Garg
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Eva Gougoula
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - David Heathcote
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Paul Hockett
- National
Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
| | | | - Andrew J. Howard
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Sonu Kumar
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Jason W. L. Lee
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Siqi Li
- Linac
Coherent Light Source, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
| | - Joseph McManus
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Jochen Mikosch
- Institut
für Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Dennis Milesevic
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Russell S. Minns
- School
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K.
| | - Simon Neville
- National
Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Atia-Tul-Noor
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | | | - Christopher Passow
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Weronika O. Razmus
- School
of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, U.K.
| | - Anja Röder
- Max-Born-Institute, Max-Born-Straße 2A, 12489 Berlin, Germany
| | - Arnaud Rouzée
- Max-Born-Institute, Max-Born-Straße 2A, 12489 Berlin, Germany
| | - Alcides Simao
- Deutsches
Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - James Unwin
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Claire Vallance
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Tiffany Walmsley
- Chemistry
Research Laboratory, Department of Chemistry, University of Oxford, Oxford OX1 3TA, U.K.
| | - Jun Wang
- Stanford
PULSE Institute, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
- Department
of Applied Physics, Stanford University, Stanford, California 94305, United States
| | - Daniel Rolles
- J.
R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506, United States
| | - Albert Stolow
- National
Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
- Department
of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
- NRC-uOttawa Joint Centre
for Extreme Photonics, Ottawa, Ontario K1A 0R6, Canada
| | - Michael S. Schuurman
- National
Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
- Department
of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada
| | - Ruaridh Forbes
- Linac
Coherent Light Source, SLAC National Accelerator
Laboratory, Menlo
Park, California 94025, United States
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41
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Kumar V, Slowik JG, Baltensperger U, Prevot ASH, Bell DM. Time-Resolved Molecular Characterization of Secondary Organic Aerosol Formed from OH and NO 3 Radical Initiated Oxidation of a Mixture of Aromatic Precursors. Environ Sci Technol 2023; 57:11572-11582. [PMID: 37496264 PMCID: PMC10413940 DOI: 10.1021/acs.est.3c00225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 07/06/2023] [Accepted: 07/07/2023] [Indexed: 07/28/2023]
Abstract
Aromatic hydrocarbons (ArHCs) and oxygenated aromatic hydrocarbons (ArHC-OHs) are emitted from a variety of anthropogenic activities and are important precursors of secondary organic aerosol (SOA) in urban areas. Here, we analyzed and compared the composition of SOA formed from the oxidation of a mixture of aromatic VOCs by OH and NO3 radicals. The VOC mixture was composed of toluene (C7H8), p-xylene + ethylbenzene (C8H10), 1,3,5-trimethylbenzene (C9H12), phenol (C6H6O), cresol (C7H8O), 2,6-dimethylphenol (C8H10O), and 2,4,6-trimethylphenol (C9H12O) in a proportion where the aromatic VOCs were chosen to approximate day-time traffic-related emissions in Delhi, and the aromatic alcohols make up 20% of the mixture. These VOCs are prominent in other cities as well, including those influenced by biomass combustion. In the NO3 experiments, large contributions from CxHyOzN dimers (C15-C18) were observed, corresponding to fast SOA formation within 15-20 min after the start of chemistry. Additionally, the dimers were a mixture of different combinations of the initial VOCs, highlighting the importance of exploring SOAs from mixed VOC systems. In contrast, the experiments with OH radicals yielded gradual SOA mass formation, with CxHyOz monomers (C6-C9) being the dominant constituents. The evolution of SOA composition with time was tracked and a fast degradation of dimers was observed in the NO3 experiments, with concurrent formation of monomer species. The rates of dimer decomposition in NO3 SOA were ∼2-3 times higher compared to those previously determined for α-pinene + O3 SOA, highlighting the dependence of particle-phase reactions on VOC precursors and oxidants. In contrast, the SOA produced in the OH experiments did not dramatically change over the same time frame. No measurable effects of humidity were observed on the composition and evolution of SOA.
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Affiliation(s)
| | - Jay G. Slowik
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
| | - Urs Baltensperger
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
| | - Andre S. H. Prevot
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
| | - David M. Bell
- Laboratory of Atmospheric Chemistry, Paul Scherrer Institute (PSI), Villigen 5232, Switzerland
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42
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Alabarse FG, Baptiste B, Guarnelli Y, Joseph B, Haines J. Strongly Modified Mechanical Properties and Phase Transition in AlPO 4-17 Due to Insertion of Guest Species at High Pressure. J Phys Chem C Nanomater Interfaces 2023; 127:14528-14533. [PMID: 37529665 PMCID: PMC10389779 DOI: 10.1021/acs.jpcc.3c03513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/29/2023] [Indexed: 08/03/2023]
Abstract
The porous aluminophosphate AlPO4-17 with a hexagonal erionite structure, exhibiting very strong negative thermal expansion, anomalous compressibility, and pressure-induced amorphization, was studied at high pressure by single-crystal and powder X-ray diffraction in the penetrating pressure transmitting media N2, O2, and Ar. Under pressure, these guest species were confirmed to enter the pores of AlPO4-17, thus completely modifying its behavior. Pressure-induced collapse in the xy plane of AlPO4-17 no longer occurred, and this plane exhibited close to zero area compressibility. Pressure-induced amorphization was also suppressed as the elastic instability in the xy plane was removed. Crystal structure refinements at a pressure of 5.5 GPa indicate that up to 28 guest molecules are inserted per unit cell and that this insertion is responsible for the reduced compressibility observed at high pressure. A phase transition to a new hexagonal structure with cell doubling along the a direction was observed above 4.4 GPa in fluid O2.
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Affiliation(s)
| | - Benoît Baptiste
- Institut
de Minéralogie, de Physique des Matériaux et de Cosmochimie,
(IMPMC), UMR 7590 CNRS—Sorbonne Université—IRD—MNHN, 4 place Jussieu, 75252 Paris, Cedex 5, France
| | - Yoann Guarnelli
- Institut
de Minéralogie, de Physique des Matériaux et de Cosmochimie,
(IMPMC), UMR 7590 CNRS—Sorbonne Université—IRD—MNHN, 4 place Jussieu, 75252 Paris, Cedex 5, France
| | - Boby Joseph
- Elettra
Sincrotrone Trieste, Trieste 34149, Italy
| | - Julien Haines
- Institut
Charles Gerhardt Montpellier, CNRS, Université
de Montpellier, ENSCM, 34293 Montpellier, France
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43
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Gambetta D, Mauro G, Pappalardo L. Mobility constraints in segregation models. Sci Rep 2023; 13:12087. [PMID: 37495661 PMCID: PMC10372033 DOI: 10.1038/s41598-023-38519-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 07/10/2023] [Indexed: 07/28/2023] Open
Abstract
Since the development of the original Schelling model of urban segregation, several enhancements have been proposed, but none have considered the impact of mobility constraints on model dynamics. Recent studies have shown that human mobility follows specific patterns, such as a preference for short distances and dense locations. This paper proposes a segregation model incorporating mobility constraints to make agents select their location based on distance and location relevance. Our findings indicate that the mobility-constrained model produces lower segregation levels but takes longer to converge than the original Schelling model. We identified a few persistently unhappy agents from the minority group who cause this prolonged convergence time and lower segregation level as they move around the grid centre. Our study presents a more realistic representation of how agents move in urban areas and provides a novel and insightful approach to analyzing the impact of mobility constraints on segregation models. We highlight the significance of incorporating mobility constraints when policymakers design interventions to address urban segregation.
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Affiliation(s)
- Daniele Gambetta
- Institute of Information Science and Technologies, National Research Council (ISTI-CNR), Pisa, Italy.
- University of Pisa, Pisa, Italy.
| | - Giovanni Mauro
- Institute of Information Science and Technologies, National Research Council (ISTI-CNR), Pisa, Italy.
- University of Pisa, Pisa, Italy.
- IMT School for Advanced Studies, Lucca, Italy.
| | - Luca Pappalardo
- Institute of Information Science and Technologies, National Research Council (ISTI-CNR), Pisa, Italy.
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44
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Herrera-Nieto P, Pérez A, De Fabritiis G. Binding-and-Folding Recognition of an Intrinsically Disordered Protein Using Online Learning Molecular Dynamics. J Chem Theory Comput 2023; 19:3817-3824. [PMID: 37341654 PMCID: PMC10863933 DOI: 10.1021/acs.jctc.3c00008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Indexed: 06/22/2023]
Abstract
Intrinsically disordered proteins participate in many biological processes by folding upon binding to other proteins. However, coupled folding and binding processes are not well understood from an atomistic point of view. One of the main questions is whether folding occurs prior to or after binding. Here we use a novel, unbiased, high-throughput adaptive sampling approach to reconstruct the binding and folding between the disordered transactivation domain of c-Myb and the KIX domain of the CREB-binding protein. The reconstructed long-term dynamical process highlights the binding of a short stretch of amino acids on c-Myb as a folded α-helix. Leucine residues, especially Leu298-Leu302, establish initial native contacts that prime the binding and folding of the rest of the peptide, with a mixture of conformational selection on the N-terminal region with an induced fit of the C-terminal.
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Affiliation(s)
- Pablo Herrera-Nieto
- Computational
Science Laboratory, Universitat Pompeu Fabra, Barcelona Biomedical Research Park
(PRBB), C Dr. Aiguader 88, 08003, Barcelona, Spain
| | - Adrià Pérez
- Computational
Science Laboratory, Universitat Pompeu Fabra, Barcelona Biomedical Research Park
(PRBB), C Dr. Aiguader 88, 08003, Barcelona, Spain
- Acellera
Labs, C Dr Trueta 183, 08005, Barcelona, Spain
| | - Gianni De Fabritiis
- Computational
Science Laboratory, Universitat Pompeu Fabra, Barcelona Biomedical Research Park
(PRBB), C Dr. Aiguader 88, 08003, Barcelona, Spain
- Acellera
Ltd, Devonshire House
582, Stanmore Middlesex, HA7 1JS, United Kingdom
- Institució
Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluis Companys 23, 08010 Barcelona, Spain
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45
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Wang F, Veth T, Kuipers M, Altelaar M, Stecker KE. Optimized Suspension Trapping Method for Phosphoproteomics Sample Preparation. Anal Chem 2023; 95:9471-9479. [PMID: 37319171 PMCID: PMC10308333 DOI: 10.1021/acs.analchem.3c00324] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 05/26/2023] [Indexed: 06/17/2023]
Abstract
A successful mass spectrometry-based phosphoproteomics analysis relies on effective sample preparation strategies. Suspension trapping (S-Trap) is a novel, rapid, and universal method of sample preparation that is increasingly applied in bottom-up proteomics studies. However, the performance of the S-Trap protocol for phosphoproteomics studies is unclear. In the existing S-Trap protocol, the addition of phosphoric acid (PA) and methanol buffer creates a fine protein suspension to capture proteins on a filter and is a critical step for subsequent protein digestion. Herein, we demonstrate that this addition of PA is detrimental to downstream phosphopeptide enrichment, rendering the standard S-Trap protocol suboptimal for phosphoproteomics. In this study, the performance of the S-Trap digestion for proteomics and phosphoproteomics is systematically evaluated in large-scale and small-scale samples. The results of this comparative analysis show that an optimized S-Trap approach, where trifluoroacetic acid is substituted for PA, is a simple and effective method to prepare samples for phosphoproteomics. Our optimized S-Trap protocol is applied to extracellular vesicles to demonstrate superior sample preparation workflow for low-abundance, membrane-rich samples.
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Affiliation(s)
- Fujia Wang
- Biomolecular
Mass Spectrometry and Proteomics, Center for Biomolecular Research
and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Tim Veth
- Biomolecular
Mass Spectrometry and Proteomics, Center for Biomolecular Research
and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Marije Kuipers
- Department
of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 2, 3584
CM Utrecht, the Netherlands
| | - Maarten Altelaar
- Biomolecular
Mass Spectrometry and Proteomics, Center for Biomolecular Research
and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Kelly E. Stecker
- Biomolecular
Mass Spectrometry and Proteomics, Center for Biomolecular Research
and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
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46
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Korakas N, Vurro D, Tsilipakos O, Vasileiadis T, Graczykowski B, Cucinotta A, Selleri S, Fytas G, Iannotta S, Pissadakis S. Photo-elasticity of silk fibroin harnessing whispering gallery modes. Sci Rep 2023; 13:9750. [PMID: 37328482 DOI: 10.1038/s41598-023-36400-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 06/02/2023] [Indexed: 06/18/2023] Open
Abstract
Silk fibroin is an important biomaterial for photonic devices in wearable systems. The functionality of such devices is inherently influenced by the stimulation from elastic deformations, which are mutually coupled through photo-elasticity. Here, we investigate the photo-elasticity of silk fibroin employing optical whispering gallery mode resonation of light at the wavelength of 1550 nm. The fabricated amorphous (Silk I) and thermally-annealed semi-crystalline structure (Silk II) silk fibroin thin film cavities display typical Q-factors of about 1.6 × 104. Photo-elastic experiments are performed tracing the TE and TM shifts of the whispering gallery mode resonances upon application of an axial strain. The strain optical coefficient K' for Silk I fibroin is found to be 0.059 ± 0.004, with the corresponding value for Silk II being 0.129 ± 0.004. Remarkably, the elastic Young's modulus, measured by Brillouin light spectroscopy, is only about 4% higher in the Silk II phase. However, differences between the two structures are pronounced regarding the photo-elastic properties due to the onset of β-sheets that dominates the Silk II structure.
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Affiliation(s)
- Nikolaos Korakas
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013, Heraklion, Greece
- Department of Materials Science and Technology, University of Crete, 70013, Heraklion, Greece
| | - Davide Vurro
- Camlin Italy Srl, Strada Budellungo 2, 43123, Parma, Italy
| | - Odysseas Tsilipakos
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013, Heraklion, Greece
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 11635, Athens, Greece
| | - Thomas Vasileiadis
- Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-614, Poznań, Poland
| | - Bartlomiej Graczykowski
- Faculty of Physics, Adam Mickiewicz University, ul. Uniwersytetu Poznańskiego 2, 61-614, Poznań, Poland
| | | | | | - George Fytas
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013, Heraklion, Greece
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128, Mainz, Germany
| | - Salvatore Iannotta
- Institute of Materials for Electronics and Magnetism (IMEM), CNR, 43124, Parma, Italy
| | - Stavros Pissadakis
- Foundation for Research and Technology-Hellas (FORTH), Institute of Electronic Structure and Laser (IESL), 70013, Heraklion, Greece.
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47
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De Haan DO, Hawkins LN, Wickremasinghe PD, Andretta AD, Dignum JR, De Haan AC, Welsh HG, Pennington EA, Cui T, Surratt JD, Cazaunau M, Pangui E, Doussin JF. Correction to Brown Carbon from Photo-Oxidation of Glyoxal and SO 2 in Aqueous Aerosol. ACS Earth Space Chem 2023; 7:1268. [PMID: 37342760 PMCID: PMC10278162 DOI: 10.1021/acsearthspacechem.3c00144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Indexed: 06/23/2023]
Abstract
[This corrects the article DOI: 10.1021/acsearthspacechem.3c00035.].
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Affiliation(s)
- David O De Haan
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92117, United States
| | - Lelia N Hawkins
- Department of Chemistry, Harvey Mudd College, 301 Platt Blvd, Claremont, California 91711, United States
| | - Praveen D Wickremasinghe
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92117, United States
| | - Alyssa D Andretta
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92117, United States
| | - Juliette R Dignum
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92117, United States
| | - Audrey C De Haan
- Department of Chemistry and Biochemistry, University of San Diego, 5998 Alcala Park, San Diego, California 92117, United States
| | - Hannah G Welsh
- Department of Chemistry, Harvey Mudd College, 301 Platt Blvd, Claremont, California 91711, United States
| | - Elyse A Pennington
- Department of Chemistry, Harvey Mudd College, 301 Platt Blvd, Claremont, California 91711, United States
| | - Tianqu Cui
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Jason D Surratt
- Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
- Department of Chemistry, College of Arts and Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
| | - Mathieu Cazaunau
- Université Paris-Est Créteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
| | - Edouard Pangui
- Université Paris-Est Créteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
| | - Jean-François Doussin
- Université Paris-Est Créteil and Université Paris Cité, CNRS, LISA, F-94010 Créteil, France
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48
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Huang Z, Wang D, Sønderskov SM, Xia D, Wu X, Liang C, Dong M. Tannic acid-functionalized 3D porous nanofiber sponge for antibiotic-free wound healing with enhanced hemostasis, antibacterial, and antioxidant properties. J Nanobiotechnology 2023; 21:190. [PMID: 37312106 PMCID: PMC10262547 DOI: 10.1186/s12951-023-01922-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/06/2023] [Indexed: 06/15/2023] Open
Abstract
Developing an antibiotic-free wound dressing with effective hemostasis and antibacterial and antioxidant capacity is highly desirable. In this work, a three-dimensional (3D) chitosan/polyvinyl alcohol-tannic acid porous nanofiber sponge (3D-TA) was prepared via electrospinning. Compared with two-dimensional (2D) fiber membrane, the unique fluffy 3D-TA nanofiber sponge had high porosity, water absorption and retention ability, hemostatic capacity. Furthermore, the 3D sponge functionalized by tannic acid (TA) endow the sponge with high antibacterial and antioxidant capacity without loading antibiotics. In addition, 3D-TA composite sponges have shown highly biocompatibility against L929 cells. The in vivo experiment shows the 3D-TA is enable to accelerate wound healing. This newly 3D-TA sponges hold great potential as wound dressings for future clinical application.
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Affiliation(s)
- Zihang Huang
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Donghui Wang
- Center for Health Science and Engineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300130, China
| | | | - Dan Xia
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.
| | - Xiaotong Wu
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China
| | - Chunyong Liang
- Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300130, China.
- Center for Health Science and Engineering, School of Health Sciences and Biomedical Engineering, Hebei University of Technology, Tianjin, 300130, China.
| | - Mingdong Dong
- Interdisciplinary Nanoscience Center (iNANO), Aarhus University, 8000, Aarhus C, Denmark.
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49
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Prabhakaran A, Dhanabalan B, Andrusenko I, Pianetti A, Lauciello S, Prato M, Marras S, Solokha P, Gemmi M, Brovelli S, Manna L, Arciniegas MP. Stable Sn-Based Hybrid Perovskite-Related Structures with Tunable Color Coordinates via Organic Cations in Low-Temperature Synthesis. ACS Energy Lett 2023; 8:2630-2640. [PMID: 37324542 PMCID: PMC10262684 DOI: 10.1021/acsenergylett.3c00791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2023] [Accepted: 05/11/2023] [Indexed: 06/17/2023]
Abstract
Organic-inorganic Pb-free layered perovskites are efficient broadband emitters and thus are promising materials for lighting applications. However, their synthetic protocols require a controlled atmosphere, high temperature, and long preparation time. This hinders the potential tunability of their emission through organic cations, as is instead common practice in Pb-based structures. Here, we present a set of Sn-Br layered perovskite-related structures that display different chromaticity coordinates and photoluminescence quantum yield (PLQY) up to 80%, depending on the choice of the organic monocation. We first develop a synthetic protocol that is performed under air and at 4 °C, requiring only a few steps. X-ray and 3D electron diffraction analyses show that the structures exhibit diverse octahedra connectivity (disconnected and face-sharing) and thus optical properties, while preserving the organic-inorganic layer intercalation. These results provide key insight into a previously underexplored strategy to tune the color coordinates of Pb-free layered perovskites through organic cations with complex molecular configurations.
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Affiliation(s)
- Aarya Prabhakaran
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Balaji Dhanabalan
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Iryna Andrusenko
- Electron
Crystallography, Center for Materials Interfaces, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
| | - Andrea Pianetti
- Dipartimento
di Scienza dei Materiali, Università
degli Studi di Milano-Bicocca, via R. Cozzi 55, 20125 Milano, Italy
| | - Simone Lauciello
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Mirko Prato
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Sergio Marras
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Pavlo Solokha
- Dipartimento
di Chimica e Chimica Industriale, Università
degli Studi di Genova, Via Dodecaneso, 31, 16146 Genova, Italy
| | - Mauro Gemmi
- Electron
Crystallography, Center for Materials Interfaces, Istituto Italiano di Tecnologia, Viale Rinaldo Piaggio 34, 56025 Pontedera, Italy
| | - Sergio Brovelli
- Dipartimento
di Scienza dei Materiali, Università
degli Studi di Milano-Bicocca, via R. Cozzi 55, 20125 Milano, Italy
| | - Liberato Manna
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Milena P. Arciniegas
- Center
for Convergent Technologies, Istituto Italiano
di Tecnologia, Via Morego 30, 16163 Genova, Italy
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50
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Benito-Santos A, Muñoz S, Therón Sánchez R, García Peñalvo FJ. Characterizing the visualization design space of distant and close reading of poetic rhythm. Front Big Data 2023; 6:1167708. [PMID: 37346813 PMCID: PMC10280022 DOI: 10.3389/fdata.2023.1167708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 05/16/2023] [Indexed: 06/23/2023] Open
Abstract
Metrical and rhythmical poetry analysis is founded on the systematic statistical analysis and comparison of sonic devices (e.g., rhythmic patterns) that emerge from a combination of pre-established aesthetic and structural rules and the poet's abilities and creative genius to convey a given message adhering to the said constraints. These rhythmical patterns, which have been traditionally obtained by means of a careful close reading of the poems, in a process known as "scansion," can now be obtained and made visible by automatic means. However, the visualization literature is still scarce on approaches that allow an insightful close and distant reading of the rhythmical patterns in a poetry corpus. In this work, we report our initial efforts in characterizing of the visualization design space of distant and close reading of poetic rhythm. By employing a digital version of a corpus of 11,268 verses originally written by the Spanish poet and playwright Federico García-Lorca (1898-1936), we could craft several prototypical visualizations representative of the inherent complexity of the problem which we expect to employ in future user studies and that we share here with the rest of the community to foster further discussion around this interesting topic.
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Affiliation(s)
- Alejandro Benito-Santos
- Digital Humanities Innovation Lab (LINHD), National University of Distance Education, Madrid, Spain
- Research Group on Interaction and e-Learning (GRIAL), University of Salamanca, Salamanca, Spain
| | - Salvador Muñoz
- Digital Humanities Innovation Lab (LINHD), National University of Distance Education, Madrid, Spain
| | - Roberto Therón Sánchez
- Research Group on Interaction and e-Learning (GRIAL), University of Salamanca, Salamanca, Spain
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