1
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Wang Y, Guo M, Xu X. Nanoproteases: Alternatives to Natural Protease for Biotechnological Applications. Chemistry 2024:e202401178. [PMID: 38705854 DOI: 10.1002/chem.202401178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Revised: 04/26/2024] [Accepted: 04/29/2024] [Indexed: 05/07/2024]
Abstract
Some nanomaterials with intrinsic protease-like activity have the advantages of good stability, biosafety, low price, large-scale preparation and unique property of nanomaterials, which are promising alternatives for natural proteases in various applications. An especial term, "nanoprotease", has been coined to stress the intrinsic proteolytic property of these nanomaterials. As a new generation of artificial proteases, they have become a burgeoning field, attracting many researchers to design and synthesize high performance nanoproteases. In this review, we summarize recent progress on all types of nanoproteases with regard of their activity, mechanism and application and introduce a new and effective strategy for engineering high-performance nanoproteases. In addition, we discuss the challenges and opportunities of nanoprotease research in the future.
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Affiliation(s)
- Yaru Wang
- Department of Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Mingxiu Guo
- Department of Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Xiaolong Xu
- Department of Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, P. R. China
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2
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Declerck K, Savić ND, Moussawi MA, Seno C, Pokratath R, De Roo J, Parac-Vogt TN. Molecular Insights into Sequence-Specific Protein Hydrolysis by a Soluble Zirconium-Oxo Cluster Catalyst. J Am Chem Soc 2024. [PMID: 38621177 DOI: 10.1021/jacs.4c01324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
The development of catalysts for controlled fragmentation of proteins is a critical undertaking in modern proteomics and biotechnology. {Zr6O8}-based metal-organic frameworks (MOFs) have emerged as promising candidates for catalysis of peptide bond hydrolysis due to their high reactivity, stability, and recyclability. However, emerging evidence suggests that protein hydrolysis mainly occurs on the MOF surface, thereby questioning the need for their highly porous 3D nature. In this work, we show that the discrete and water-soluble [Zr6O4(OH)4(CH3CO2)8(H2O)2Cl3]+ (Zr6) metal-oxo cluster (MOC), which is based on the same hexamer motif found in various {Zr6O8}-based MOFs, shows excellent activity toward selective hydrolysis of equine skeletal muscle myoglobin. Compared to related Zr-MOFs, Zr6 exhibits superior reactivity, with near-complete protein hydrolysis after 24 h of incubation at 60 °C, producing seven selective fragments with a molecular weight in the range of 3-15 kDa, which are of ideal size for middle-down proteomics. The high solubility and molecular nature of Zr6 allow detailed solution-based mechanistic/interaction studies, which revealed that cluster-induced protein unfolding is a key step that facilitates hydrolysis. A combination of multinuclear nuclear magnetic resonance spectroscopy and pair distribution function analysis provided insight into the speciation of Zr6 and the ligand exchange processes occurring on the surface of the cluster, which results in the dimerization of two Zr6 clusters via bridging oxygen atoms. Considering the relevance of discrete Zr-oxo clusters as building blocks of MOFs, the molecular-level understanding reported in this work contributes to the further development of novel catalysts based on Zr-MOFs.
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Affiliation(s)
| | - Nada D Savić
- Department of Chemistry, KU Leuven, 3001 Leuven, Belgium
| | | | - Carlotta Seno
- Department of Chemistry, University of Basel, 4058 Basel, Switzerland
| | - Rohan Pokratath
- Department of Chemistry, University of Basel, 4058 Basel, Switzerland
| | - Jonathan De Roo
- Department of Chemistry, University of Basel, 4058 Basel, Switzerland
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3
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Lentink S, Salazar Marcano DE, Moussawi MA, Vandebroek L, Van Meervelt L, Parac-Vogt TN. Fine-tuning non-covalent interactions between hybrid metal-oxo clusters and proteins. Faraday Discuss 2023; 244:21-38. [PMID: 37102318 DOI: 10.1039/d2fd00161f] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interactions between the protein Hen Egg White Lysozyme (HEWL) and three different hybrid Anderson-Evans polyoxometalate clusters - AE-NH2 (δ-[MnMo6O18{(OCH2)3CNH2}2]3-), AE-CH3 (δ-[MnMo6O18{(OCH2)3CCH3}2]3-) and AE-Biot (δ-[MnMo6O18{(OCH2)3CNHCOC9H15N2OS}2]3-) - were studied via tryptophan fluorescence spectroscopy and single crystal X-ray diffraction. Quenching of tryptophan fluorescence was observed in the presence of all three hybrid polyoxometalate clusters (HPOMs), but the extent of quenching and the binding affinity were greatly dependent on the nature of the organic groups attached to the cluster. Control experiments further revealed the synergistic effect of the anionic polyoxometalate core and organic ligands towards enhanced protein interactions. Furthermore, the protein was co-crystallised with each of the three HPOMs, resulting in four different crystal structures, thus allowing for the binding modes of HPOM-protein interactions to be investigated with near-atomic precision. All crystal structures displayed a unique mode of binding of the HPOMs to the protein, with both functionalisation and the pH of the crystallisation conditions influencing the interactions. From the crystal structures, it was determined that HPOM-protein non-covalent complexes formed through a combination of electrostatic attraction between the polyoxometalate cluster and positively charged surface regions of HEWL, and direct and water-mediated hydrogen bonds with both the metal-oxo inorganic core and the functional groups of the ligand, where possible. Hence, functionalisation of metal-oxo clusters shows great potential in tuning their interactions with proteins, which is of interest for several biomedical applications.
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Affiliation(s)
- Sarah Lentink
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | | | - Mhamad Aly Moussawi
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | - Laurens Vandebroek
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
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Salazar Marcano D, Savić ND, Abdelhameed SAM, de Azambuja F, Parac-Vogt TN. Exploring the Reactivity of Polyoxometalates toward Proteins: From Interactions to Mechanistic Insights. JACS AU 2023; 3:978-990. [PMID: 37124292 PMCID: PMC10131212 DOI: 10.1021/jacsau.3c00011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/31/2023] [Accepted: 02/01/2023] [Indexed: 05/03/2023]
Abstract
The latest advances in the study of the reactivity of metal-oxo clusters toward proteins showcase how fundamental insights obtained so far open new opportunities in biotechnology and medicine. In this Perspective, these studies are discussed through the lens of the reactivity of a family of soluble anionic metal-oxo nanoclusters known as polyoxometalates (POMs). POMs act as catalysts in a wide range of reactions with several different types of biomolecules and have promising therapeutic applications due to their antiviral, antibacterial, and antitumor activities. However, the lack of a detailed understanding of the mechanisms behind biochemically relevant reactions-particularly with complex biological systems such as proteins-still hinders further developments. Hence, in this Perspective, special attention is given to reactions of POMs with peptides and proteins showcasing a molecular-level understanding of the reaction mechanism. In doing so, we aim to highlight both existing limitations and promising directions of future research on the reactivity of metal-oxo clusters toward proteins and beyond.
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5
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Falaise C, Mpacko Priso G, Leclerc N, Haouas M, Cadot E. Making Heterometallic Metal-Metal Bonds in Keggin-Type Polyoxometalates by a Six-Electron Reduction Process. Inorg Chem 2023; 62:2494-2502. [PMID: 36716738 DOI: 10.1021/acs.inorgchem.2c03769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Polyoxometalates (POMs) represent a promising class of molecular electron reservoirs. However, their multielectron reduction gives rise to intricate physical-chemical phenomena that must be fully understood for their future use in energy-storage devices. Herein, we show that bulk electrolysis of the archetypal Keggin-type POM [Si(WVI2MoVIO10)(WVI3O10)3]4- in aqueous solution leads to the six-electron-reduced derivative [Si(WIV2MoIVO7(H2O)3)(WVI3O10)3]4- (notated SiW11Mo-VI') in which the mixed-metal triad acts as a storage unit for six electrons and six protons. X-ray diffraction analysis and multinuclear NMR (183W and 95Mo) studies reveal that this electron-rich species represents the first example of POMs containing heterometallic metal-metal bonds between addenda centers. This electron-rich POM can be further reduced through multielectronic events, while its full oxidation restores the structure of the oxidized parent ion. Remarkably, the formation of SiW11Mo-VI' results from a fast clustering process compared to that observed for the entirely W-based analogue, revealing that the formation of metal-metal bonds in the mixed-metal Mo/W POM is facilitated because the reaction rate is not limited by a slow disproportionation step. Last, we evaluate the supramolecular properties of SiW11Mo-VI' using a method based on the cloud-point measurement of a nonionic surfactant. This investigation demonstrates that the clustering process has dramatic consequences on the solution behavior of the POM, canceling its superchaotropic character due to a local structuring effect of the hydration shell. These fundamental results pave the way for applications using the massive electron-storage properties of mixed-metal POMs.
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Affiliation(s)
- Clément Falaise
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 avenue des Etats-Unis, 78035Versailles, France
| | - Gabrielle Mpacko Priso
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 avenue des Etats-Unis, 78035Versailles, France
| | - Nathalie Leclerc
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 avenue des Etats-Unis, 78035Versailles, France
| | - Mohamed Haouas
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 avenue des Etats-Unis, 78035Versailles, France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles, CNRS, UVSQ, Université Paris-Saclay, 45 avenue des Etats-Unis, 78035Versailles, France
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6
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Abdelhameed SAM, de Azambuja F, Vasović T, Savić ND, Ćirković Veličković T, Parac-Vogt TN. Regioselective protein oxidative cleavage enabled by enzyme-like recognition of an inorganic metal oxo cluster ligand. Nat Commun 2023; 14:486. [PMID: 36717594 PMCID: PMC9887005 DOI: 10.1038/s41467-023-36085-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 01/16/2023] [Indexed: 02/01/2023] Open
Abstract
Oxidative modifications of proteins are key to many applications in biotechnology. Metal-catalyzed oxidation reactions efficiently oxidize proteins but with low selectivity, and are highly dependent on the protein surface residues to direct the reaction. Herein, we demonstrate that discrete inorganic ligands such as polyoxometalates enable an efficient and selective protein oxidative cleavage. In the presence of ascorbate (1 mM), the Cu-substituted polyoxometalate K8[Cu2+(H2O)(α2-P2W17O61)], (CuIIWD, 0.05 mM) selectively cleave hen egg white lysozyme under physiological conditions (pH =7.5, 37 °C) producing only four bands in the gel electropherogram (12.7, 11, 10, and 5 kDa). Liquid chromatography/mass spectrometry analysis reveals a regioselective cleavage in the vicinity of crystallographic CuIIWD/lysozyme interaction sites. Mechanistically, polyoxometalate is critical to position the Cu at the protein surface and limit the generation of oxidative species to the proximity of binding sites. Ultimately, this study outlines the potential of discrete, designable metal oxo clusters as catalysts for the selective modification of proteins through radical mechanisms under non-denaturing conditions.
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Affiliation(s)
| | | | - Tamara Vasović
- Center of Excellence for Molecular Food Sciences & Department of Biochemistry, University of Belgrade - Faculty of Chemistry, Belgrade, Serbia
| | - Nada D Savić
- KU Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Tanja Ćirković Veličković
- Center of Excellence for Molecular Food Sciences & Department of Biochemistry, University of Belgrade - Faculty of Chemistry, Belgrade, Serbia.,Ghent University Global Campus, Yeonsu-gu, Incheon, South Korea.,Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.,Serbian Academy of Sciences and Arts, Belgrade, Serbia
| | - Tatjana N Parac-Vogt
- KU Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001, Leuven, Belgium.
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7
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Soria-Carrera H, Atrián-Blasco E, Martín-Rapún R, Mitchell SG. Polyoxometalate-peptide hybrid materials: from structure-property relationships to applications. Chem Sci 2022; 14:10-28. [PMID: 36605748 PMCID: PMC9769095 DOI: 10.1039/d2sc05105b] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/16/2022] [Indexed: 11/17/2022] Open
Abstract
Organo-functionalisation of polyoxometalates (POMs) represents an effective approach to obtain diverse arrays of functional structures and materials, where the introduction of organic moieties into the POM molecules can dramatically change their surface chemistry, charge, polarity, and redox properties. The synergistic combination of POMs and peptides, which perform a myriad of essential roles within cellular biochemistry, including protection and transport in living organisms, leads to functional hybrid materials with unique properties. In this Perspective article, we present the principal synthetic routes to prepare and characterise POM-peptide hybrids, together with a comprehensive description of how their properties - such as redox chemistry, stereochemistry and supramolecular self-assembly - give rise to materials with relevant catalytic, adhesive, and biomedical applications. By presenting the state-of-the-art of the POM-peptide field, we show specifically how emerging chemical approaches can be harnessed to develop tailored POM-peptide materials with synergistic properties for applications in a variety of disciplines.
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Affiliation(s)
- Héctor Soria-Carrera
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III 28029 Madrid Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Elena Atrián-Blasco
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III 28029 Madrid Spain
| | - Rafael Martín-Rapún
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III 28029 Madrid Spain
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
| | - Scott G Mitchell
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza c/ Pedro Cerbuna 12 50009 Zaragoza Spain
- CIBER de Bioingeniería, Biomateriales y Nanomedicina, Instituto de Salud Carlos III 28029 Madrid Spain
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8
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Gil A, Carbó JJ. Computational Modelling of the Interactions Between Polyoxometalates and Biological Systems. Front Chem 2022; 10:876630. [PMID: 35494630 PMCID: PMC9046717 DOI: 10.3389/fchem.2022.876630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 03/21/2022] [Indexed: 11/27/2022] Open
Abstract
Polyoxometalates (POMs) structures have raised considerable interest for the last years in their application to biological processes and medicine. Within this area, our mini-review shows that computational modelling is an emerging tool, which can play an important role in understanding the interaction of POMs with biological systems and the mechanisms responsible of their activity, otherwise difficult to achieve experimentally. During recent years, computational studies have mainly focused on the analysis of POM binding to proteins and other systems such as lipid bilayers and nucleic acids, and on the characterization of reaction mechanisms of POMs acting as artificial metalloproteases and phosphoesterases. From early docking studies locating binding sites, molecular dynamics (MD) simulations have allowed to characterize the nature of POM···protein interactions, and to evaluate the effect of the charge, size, and shape of the POM on protein affinity, including also, the atomistic description of chaotropic character of POM anions. Although these studies rely on the interaction with proteins and nucleic acid models, the results could be extrapolated to other biomolecules such as carbohydrates, triglycerides, steroids, terpenes, etc. Combining MD simulations with quantum mechanics/molecular mechanics (QM/MM) methods and DFT calculations on cluster models, computational studies are starting to shed light on the factors governing the activity and selectivity for the hydrolysis of peptide and phosphoester bonds catalysed by POMs.
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Affiliation(s)
- Adrià Gil
- ARAID Foundation, Zaragoza, Spain
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea (ISQCH) CSIC, Universidad de Zaragoza, Zaragoza, Spain
- Faculdade de Ciências, BioISI—Biosystems and Integrative Sciences Institute, Universidade de Lisboa, Lisboa, Portugal
- *Correspondence: Adrià Gil, ; Jorge J. Carbó,
| | - Jorge J. Carbó
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili, Tarragona, Spain
- *Correspondence: Adrià Gil, ; Jorge J. Carbó,
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Abdelhameed SAM, Ly HGT, Moons J, de Azambuja F, Proost P, Parac-Vogt TN. Expanding the reactivity of inorganic clusters towards proteins: the interplay between the redox and hydrolytic activity of Ce(iv)-substituted polyoxometalates as artificial proteases. Chem Sci 2021; 12:10655-10663. [PMID: 34447559 PMCID: PMC8356750 DOI: 10.1039/d1sc02760c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/05/2021] [Indexed: 12/13/2022] Open
Abstract
The ability of soluble metal-oxo clusters to specifically interact with protein surfaces makes them attractive as potential inorganic drugs and as artificial enzymes. In particular, metal-substituted polyoxometalates (MS-POMs) are remarkably selective in hydrolyzing a range of different proteins. However, the influence of MS-POMs' redox chemistry on their proteolytic activity remains virtually unexplored. Herein we report a highly site-selective hydrolysis of hemoglobin (Hb), a large tetrameric globular protein, by a Ce(iv)-substituted Keggin polyoxometalate (CeIVK), and evaluate the effect of CeIVK's redox chemistry on its reactivity and selectivity as an artificial protease. At pH 5.0, incubation of Hb with CeIVK resulted in strictly selective protein hydrolysis at six Asp-X bonds, two of which were located in the α-chain (α(Asp75-Leu76) and α(Asp94-Pro95)) and five at the β-chain (β(Asp51-Ala52), β(Asp68-Ser69), β(Asp78-Asp79), β(Asp98-Pro99) and β(Asp128-Phe129)). However, increasing the pH of the reaction mixture to 7.4 decreased the CeIVK hydrolytic reactivity towards Hb, resulting in the cleavage of only one peptide bond (β(Asp128-Phe129)). Combination of UV-Vis, circular dichroism and Trp fluorescence spectroscopy indicated similar interactions between Hb and CeIVK at both pH conditions; however, 31P NMR spectroscopy showed faster reduction of CeIVK into the hydrolytically inactive CeIIIK form in the presence of protein at pH 7.4. In agreement with these results, careful mapping of all hydrolyzed Asp-X bonds on the protein structure revealed that the lower reactivity toward the α-chain was consistent with the presence of more redox-active amino acids (Tyr and His) in this subunit in comparison with the β-chain. This points towards a link between the presence of the redox-active sites on the protein surface and efficiency and selectivity of redox-active MS-POMs as artificial proteases. More importantly, the study provides a way to tune the redox and hydrolytic reactivity of MS-POMs towards proteins through adjustment of reaction parameters like temperature and pH.
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Affiliation(s)
| | - Hong Giang T Ly
- KU Leuven, Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
- Department of Chemistry, College of Natural Sciences, Can Tho University Can Tho Vietnam
| | - Jens Moons
- KU Leuven, Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | | | - Paul Proost
- KU Leuven Department of Microbiology, Immunology, and Transplantation Herestraat 49 3000 Leuven Belgium
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Olsen MR, Colliard I, Rahman T, Miyaishi TC, Harper B, Harper S, Nyman M. Hybrid Polyoxometalate Salt Adhesion by Butyltin Functionalization. ACS APPLIED MATERIALS & INTERFACES 2021; 13:19497-19506. [PMID: 33856779 DOI: 10.1021/acsami.1c03269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Polyoxometalate (POM)-based ionic liquids, with nearly infinite compositional variations to fine-tune antimicrobial and physical properties, function as water purification filters, anticorrosion/antibacterial coatings for natural stones, self-repairing acid-resistant coatings, catalysts, and electroactive, stable solvents. By combining hydrophobic quaternary ammonium cations (QACs; tetraheptylammonium and trihexyltetradecylammonium) with butyltin-substituted polyoxotungstates [(BuSn)3(α-SiW9O37)] via repeated solvent extraction-ion exchange, we obtained phase-pure hybrid POM salts (referred to as such because they melt above room temperature). If the solvent extraction process is performed only once, then solids with high salt contamination and considerably lower melting temperatures are obtained. Solution-phase behavior, based on POM-QAC interactions, was similar for all formulations in polar and nonpolar organic solvents, as observed by X-ray scattering and multinuclear magnetic resonance spectroscopy. However, solid thin films of the butyltin-functionalized hybrid POM salts were significantly more stable and adhesive than their inorganic analogues. We attribute this to the favorable hydrophobic interactions between the butyltin groups and the QACs. All synthesized hybrid POM salts display a potent antimicrobial activity toward Escherichia coli. These studies provide fundamental form-function understanding of hybrid POM salts, based on interactions between ions in these complex hybrid phases.
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Affiliation(s)
- Morgan Rose Olsen
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
- Department of Chemistry, Reed College, Portland, Oregon 97202, United States
| | - Ian Colliard
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Tasnim Rahman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Taiki C Miyaishi
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, United States
| | - Bryan Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
| | - Stacey Harper
- Department of Environmental and Molecular Toxicology, Oregon State University, Corvallis, Oregon 97331, United States
- School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, Oregon 97331, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
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11
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Azambuja FD, Moons J, Parac-Vogt TN. The Dawn of Metal-Oxo Clusters as Artificial Proteases: From Discovery to the Present and Beyond. Acc Chem Res 2021; 54:1673-1684. [PMID: 33600141 DOI: 10.1021/acs.accounts.0c00666] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The selective cleavage of peptide bonds in proteins is of paramount importance in many areas of the biological and medical sciences, playing a key role in protein structure/function/folding analysis, protein engineering, and targeted proteolytic drug design. Current applications that depend on selective protein hydrolysis largely rely on costly proteases such as trypsin, which are sensitive to the pH, ionic strength, and temperature conditions. Moreover, >95% of peptides deposited in databases are generated from trypsin digests, restricting the information within the analyzed proteomes. On the other hand, harsh and toxic chemical reagents such as BrCN are very active but cause permanent modifications of certain amino acid residues. Consequently, transition-metal complexes have emerged as smooth and selective artificial proteases owing to their ability to provide larger fragments and complementary structural information. In the past decade, our group has discovered the unique protease activity of diverse metal-oxo clusters (MOC) and pioneered a distinctive approach to the development of selective artificial proteases. In contrast to classical coordination complexes which often depend on amino acid side chains to control the regioselectivity, the selectivity profile of MOCs is determined by a complex combination of structural factors, such as the protein surface charge, metal coordination to specific side chains, and hydrogen bonding between the protein surface and the MOC scaffold.In this Account, we present a critical overview of our detailed kinetic, spectroscopic, and crystallographic studies in MOC-assisted peptide bond hydrolysis, from its origins to the current rational and detailed mechanistic understanding. To this end, reactivity trends related to the structure and properties of MOCs based on the hydrolysis of small model peptides and key structural aspects governing the selectivity of protein hydrolysis are presented. Finally, our endeavors in seeking the next generation of heterogeneous MOC-based proteases are briefly discussed by embedding MOCs in metal-organic frameworks or using them as discrete nanoclusters in the development of artificial protease-like materials (i.e., nanozymes). The deep and comprehensive understanding sought experimentally and theoretically over the years in aqueous systems with intrinsic polar and charged substrates provides a unique view of the reactivity between inorganic moieties and biomolecules, thereby broadly impacting several different fields (e.g., catalysis in biochemistry, inorganic chemistry, and organic chemistry).
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Affiliation(s)
| | - Jens Moons
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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12
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Postal K, Santana FS, Hughes DL, Rüdiger AL, Ribeiro RR, Sá EL, de Souza EM, Soares JF, Nunes GG. Stability in solution and chemoprotection by octadecavanadates(IV/V) in E. coli cultures. J Inorg Biochem 2021; 219:111438. [PMID: 33823363 DOI: 10.1016/j.jinorgbio.2021.111438] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 03/20/2021] [Accepted: 03/20/2021] [Indexed: 11/25/2022]
Abstract
Two mixed-valence octadecavanadates, (NH4)2(Me4N)5[VIV12VV6O42I]·Me4NI·5H2O (V18I) and [{K6(OH2)12VIV11VV7O41(PO4)·4H2O}n] (V18P), were synthesized and characterized by single-crystal X-ray diffraction analysis and FTIR, Raman, 51V NMR, EPR and UV/Vis/NIR spectroscopies. The chemoprotective activity of V18I and V18P towards the alkylating agent diethyl sulfate was assessed in E. coli cultures. The complex V18I was nontoxic in concentrations up to 5.0 mmol L-1, while V18P presented moderate toxicity in the concentration range 0.10 - 10 mmol L-1. Conversely, a ca. 35% enhancement in culture growth as compared to cells treated only with diethyl sulfate was observed upon addition of V18I (0.10 to 2.5 mmol L-1), while the combination of diethyl sulfate with V18P increased the cytotoxicity presented by diethyl sulfate alone. 51V NMR and EPR speciation studies showed that V18I is stable in solution, while V18P suffers partial breakage to give low nuclearity oxidometalates of vanadium(V) and (IV). According to the results, the chemoprotective effect depends strongly on the direct reactivity of the polyoxidovanadates (POV) towards the alkylating agent. The reaction of diethyl sulfate with V18I apparently produces a new, rearranged POV instead of poorly-reactive breakage products, while V18P shows the formation and subsequent consumption of low-nuclearity species. The correlation of this chemistry with that of other mixed-valence polyoxidovanadates, [H6VIV2VV12O38PO4]5- (V14) and [VIV8VV7O36Cl]6- (V15), suggests a relationship between stability in solution and chemoprotective performance.
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Affiliation(s)
- Kahoana Postal
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | | | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich NR4 7TJ, UK
| | - André L Rüdiger
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Ronny R Ribeiro
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Eduardo L Sá
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Emanuel M de Souza
- Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Jaísa F Soares
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil
| | - Giovana G Nunes
- Departamento de Química, Universidade Federal do Paraná, Curitiba, PR, Brazil.
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13
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Norjmaa G, Solé-Daura A, Besora M, Ricart JM, Carbó JJ. Peptide Hydrolysis by Metal (Oxa)cyclen Complexes: Revisiting the Mechanism and Assessing Ligand Effects. Inorg Chem 2021; 60:807-815. [PMID: 33411534 DOI: 10.1021/acs.inorgchem.0c02859] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanism responsible for peptide bond hydrolysis by Co(III) and Cu(II) complexes with (oxa)cyclen ligands has been revisited by means of computational tools. We propose that the mechanism starts by substrate coordination and an outer-sphere attack on the amide C atom of a solvent water molecule assisted by the metal hydroxo moiety as a general base, which occurs through six-membered ring transition states. This new mechanism represents a more likely scenario than the previously proposed mechanisms that involved an inner-sphere nucleophilic attack through more strained four-membered rings transition states. The corresponding computed overall free-energy barrier of 25.2 kcal mol-1 for hydrolysis of the peptide bond in Phe-Ala by a cobalt(III) oxacyclen catalyst (1) is consistent with the experimental values obtained from rate constants. Also, we assessed the influence of the nature of the ligand throughout a systematic replacement of N by O atoms in the (oxa)cyclen ligand. Increasing the number of coordinating O atoms accelerates the reaction by increasing the Lewis acidity of the metal ion. On the other hand, the higher reactivity observed for the copper(II) oxacyclen catalyst with respect to the analogous Co(III) complex can be attributed to the larger Brönsted basicity of the copper(II) hydroxo ligand. Ultimately, the detailed understanding of the ligand and metal nature effects allowed us to identify the double role of the metal hydroxo complexes as Lewis acids and Brönsted bases and to rationalize the observed reactivity trends.
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Affiliation(s)
- Gantulga Norjmaa
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Albert Solé-Daura
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Maria Besora
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Josep M Ricart
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Jorge J Carbó
- Department de Química Física i Inorgànica, Universitat Rovira i Virgili (URV), Marcel·lí Domingo 1, 43007 Tarragona, Spain
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14
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Sciortino G, Aureliano M, Garribba E. Rationalizing the Decavanadate(V) and Oxidovanadium(IV) Binding to G-Actin and the Competition with Decaniobate(V) and ATP. Inorg Chem 2021; 60:334-344. [PMID: 33253559 PMCID: PMC8016201 DOI: 10.1021/acs.inorgchem.0c02971] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The experimental data collected over the past 15 years on the interaction of decavanadate(V) (V10O286-; V10), a polyoxometalate (POM) with promising anticancer and antibacterial action, with G-actin, were rationalized by using several computational approaches (docking, density functional theory (DFT), and molecular dynamics (MD)). Moreover, a comparison with the isostructural and more stable decaniobate(V) (Nb10O286-; Nb10) was carried out. Four binding sites were identified, named α, β, γ, and δ, the site α being the catalytic nucleotide site located in the cleft of the enzyme at the interface of the subdomains II and IV. It was observed that the site α is preferred by V10, whereas Nb10 is more stable at the site β; this indicates that, differently from other proteins, G-actin could contemporaneously bind the two POMs, whose action would be synergistic. Both decavanadate and decaniobate induce conformational rearrangements in G-actin, larger for V10 than Nb10. Moreover, the binding mode of oxidovanadium(IV) ion, VIVO2+, formed upon the reduction of decavanadate(V) by the -SH groups of accessible cysteine residues, is also found in the catalytic site α with (His161, Asp154) coordination; this adduct overlaps significantly with the region where ATP is bound, accounting for the competition between V10 and its reduction product VIVO2+ with ATP, as previously observed by EPR spectroscopy. Finally, the competition with ATP was rationalized: since decavanadate prefers the nucleotide site α, Ca2+-ATP displaces V10 from this site, while the competition is less important for Nb10 because this POM shows a higher affinity for β than for site α. A relevant consequence of this paper is that other metallodrug-protein systems, in the absence or presence of eventual inhibitors and/or competition with molecules of the organism, could be studied with the same approach, suggesting important elements for an explanation of the biological data and a rational drug design.
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Affiliation(s)
- Giuseppe Sciortino
- Dipartimento
di Chimica e Farmacia, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
- Institute
of Chemical Research of Catalonia (ICIQ), Avgda. Països Catalans, 16, 43007 Tarragona, Spain
- (G.S.) Phone +34 977 920229. Email
| | - Manuel Aureliano
- CCMar,
FCT, Faculdade de Ciências e Tecnologia, Universidade do Algarve, 8000-139 Faro, Portugal
- (M.A.) Phone +351 289 800977. Email
| | - Eugenio Garribba
- Dipartimento
di Chimica e Farmacia, Università
di Sassari, Via Vienna 2, I-07100 Sassari, Italy
- (E.G.) Phone +39 079 229487. Email
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15
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Solé-Daura A, Rodríguez-Fortea A, Poblet JM, Robinson D, Hirst JD, Carbó JJ. Origin of Selectivity in Protein Hydrolysis by Zr(IV)-Containing Metal Oxides as Artificial Proteases. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02848] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Albert Solé-Daura
- Department de Quı́mica Fı́sica i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Antonio Rodríguez-Fortea
- Department de Quı́mica Fı́sica i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Josep M. Poblet
- Department de Quı́mica Fı́sica i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - David Robinson
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
- Department of Chemistry and Forensics, School of Science and Technology, Nottingham Trent University, Clifton Lane, Nottingham NG11 8NS, United Kingdom
| | - Jonathan D. Hirst
- School of Chemistry, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Jorge J. Carbó
- Department de Quı́mica Fı́sica i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
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16
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Zhao D, Wang Y, Su Q, Li L, Zhou J. Lysozyme Adsorption on Porous Organic Cages: A Molecular Simulation Study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:12299-12308. [PMID: 32988201 DOI: 10.1021/acs.langmuir.0c02233] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Recently, porous organic cages (POCs) have emerged as a novel porous material with many merits and are widely utilized in many application fields. In this work, for the first time, molecular dynamics simulations were performed to investigate the mechanism of lysozyme adsorption onto the CC3 crystal, a kind of widely studied POC material. The simulation results show that lysozyme adsorbs onto the surface of CC3 with "top end-on," "back-on," or "side-on" orientations. It is found that the van der Waals interaction is the primary contribution to the binding; the conformation of the lysozyme is well preserved during the adsorption process. This provides some evidence for its biocompatibility and feasibility in biorelated applications. Arginine plays an important role in mediating the adsorption through nonpolar aliphatic chains. More importantly, the distribution and structure of the water layer on the POC surface has a significant impact on adsorption. This study provides insights into the development of POC materials with defined morphologies for the adsorption of biomolecules and may help the rational design of biorelated systems.
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Affiliation(s)
- Daohui Zhao
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Yuqing Wang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
| | - Qianwen Su
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, P.R. China
| | - Libo Li
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China
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17
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Bondžić AM, Lazarević-Pašti TD, Leskovac AR, Petrović SŽ, Čolović MB, Parac-Vogt TN, Janjić GV. A new acetylcholinesterase allosteric site responsible for binding voluminous negatively charged molecules - the role in the mechanism of AChE inhibition. Eur J Pharm Sci 2020; 151:105376. [PMID: 32492460 DOI: 10.1016/j.ejps.2020.105376] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 05/05/2020] [Accepted: 05/09/2020] [Indexed: 01/15/2023]
Abstract
Acetylcholinesterase (AChE) inhibitors are important in the treatment of neurodegenerative diseases. Two inhibitors, 12-tungstosilicic acid (WSiA) and 12-tungstophosphoric acid (WPA), which have polyoxometalate (POM) type structure, have been shown to inhibit AChE activity in nM concentration. Circular dichroism and tryptophan fluorescence spectroscopy demonstrated that the AChE inhibition was not accompanied by significant changes in the secondary structure of the enzyme. The molecular docking approach has revealed a new allosteric binding site, termed β-allosteric site (β-AS), which is considered responsible for the inhibition of AChE by POMs. To the best of our knowledge, this is the first study reporting a new allosteric site that is considered responsible for AChE inhibition by voluminous and negatively charged molecules such as POMs. The selected POMs were further subjected to genotoxicity testing using human peripheral blood cells as a model system. It was shown that WSiA and WPA induced a mild cytostatic but not genotoxic effects in human lymphocytes, which indicates their potential to be used as medicinal drugs. The identification of non-toxic compounds capable of binding to an allosteric site that so far has not been considered responsible for enzyme inhibition could be fundamental for the development of new drug design strategies and the discovery of more efficient AChE modulators.
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Affiliation(s)
- Aleksandra M Bondžić
- Department of Physical Chemistry, "VINČA" Institute of Nuclear Sciences- National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia.
| | - Tamara D Lazarević-Pašti
- Department of Physical Chemistry, "VINČA" Institute of Nuclear Sciences- National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Andreja R Leskovac
- Department of Physical Chemistry, "VINČA" Institute of Nuclear Sciences- National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Sandra Ž Petrović
- Department of Physical Chemistry, "VINČA" Institute of Nuclear Sciences- National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | - Mirjana B Čolović
- Department of Physical Chemistry, "VINČA" Institute of Nuclear Sciences- National Institute of thе Republic of Serbia, University of Belgrade, P.O. Box 522, 11000 Belgrade, Serbia
| | | | - Goran V Janjić
- Institute of Chemistry, Technology and Metallurgy, National Institute, University of Belgrade, Njegoševa 12, Belgrade, Serbia.
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18
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Solé-Daura A, Poblet JM, Carbó JJ. Structure-Activity Relationships for the Affinity of Chaotropic Polyoxometalate Anions towards Proteins. Chemistry 2020; 26:5799-5809. [PMID: 32104951 DOI: 10.1002/chem.201905533] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Indexed: 12/31/2022]
Abstract
The influence of the composition of chaotropic polyoxometalate (POM) anions on their affinity to biological systems was studied by means of atomistic molecular dynamics (MD) simulations. The variations in the affinity to hen egg-white lysozyme (HEWL) were analyzed along two series of POMs whereby the charge or the size and shape of the metal cluster are modified systematically. Our simulations revealed a quadratic relationship between the charge of the POM and its affinity to HEWL as a consequence of the parabolic growth of POM⋅⋅⋅water interaction with the charge. As the charge increases, POMs become less chaotropic (more kosmotropic) increasing the number and the strength of POM-water hydrogen bonds and structuring the solvation shell around the POM. This atomistic description explains the proportionally larger desolvation energies and less protein affinity for highly charged POMs, and consequently, the preference for moderate charge densities (q/M=0.33). Also, our simulations suggest that POM⋅⋅⋅protein interactions are size-specific. The cationic pockets of HEWL protein show a preference for Keggin-like structures, which display the optimal dimensions (≈1 nm). Finally, we developed a quantitative multidimensional model for protein affinity with predictive ability (r2 =0.97; q2 =0.88) using two molecular descriptors that account for the charge density (charge per metal atom ratio; q/M) and the size and shape (shape weighted-volume; VS ).
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Affiliation(s)
- Albert Solé-Daura
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel⋅lí Domingo 1, 43007, Tarragona, Spain
| | - Josep M Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel⋅lí Domingo 1, 43007, Tarragona, Spain
| | - Jorge J Carbó
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel⋅lí Domingo 1, 43007, Tarragona, Spain
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19
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Misra A, Kozma K, Streb C, Nyman M. Beyond Charge Balance: Counter-Cations in Polyoxometalate Chemistry. Angew Chem Int Ed Engl 2020; 59:596-612. [PMID: 31260159 PMCID: PMC6972580 DOI: 10.1002/anie.201905600] [Citation(s) in RCA: 214] [Impact Index Per Article: 53.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Indexed: 12/13/2022]
Abstract
Polyoxometalates (POMs) are molecular metal-oxide anions applied in energy conversion and storage, manipulation of biomolecules, catalysis, as well as materials design and assembly. Although often overlooked, the interplay of intrinsically anionic POMs with organic and inorganic cations is crucial to control POM self-assembly, stabilization, solubility, and function. Beyond simple alkali metals and ammonium, chemically diverse cations including dendrimers, polyvalent metals, metal complexes, amphiphiles, and alkaloids allow tailoring properties for known applications, and those yet to be discovered. This review provides an overview of fundamental POM-cation interactions in solution, the resulting solid-state compounds, and behavior and properties that emerge from these POM-cation interactions. We will explore how application-inspired research has exploited cation-controlled design to discover new POM materials, which in turn has led to the quest for fundamental understanding of POM-cation interactions.
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Affiliation(s)
- Archismita Misra
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - Karoly Kozma
- Department of ChemistryOregon State UniversityCorvallisOR97331USA
| | - Carsten Streb
- Institute of Inorganic Chemistry IUlm UniversityAlbert-Einstein-Allee 1189081UlmGermany
| | - May Nyman
- Department of ChemistryOregon State UniversityCorvallisOR97331USA
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20
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Molecular docking of polyoxometalates as potential α-glucosidase inhibitors. J Inorg Biochem 2019; 203:110914. [PMID: 31751818 DOI: 10.1016/j.jinorgbio.2019.110914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/30/2019] [Accepted: 11/08/2019] [Indexed: 01/16/2023]
Abstract
α-Glucosidase is an important target enzyme for the treatment of type 2 diabetes in humans. In our previous studies, it was found that polyoxometalates exhibited an effective inhibitory effect on the activity of α-glucosidase, while polyoxometalates have the characteristics of structural diversity and unique properties. Herein, we investigated the inhibition of two different series of polyoxometalates on α-glucosidases by enzyme kinetics and molecular docking. The results demonstrated that all of the studied compounds had a significant inhibitory ability on α-glucosidase as compared with the positive control acarbose. H8[P2Mo17Cr(OH2)O61] reversibly inhibited α-glucosidase in a competitive manner with IC50 of 115.50 ± 1.64 μM and KI value of 44.31 μM. All other compounds reversibly inhibited enzymatic activity in a mixed manner. H6PMo9V3O40 and H8[P2Mo17Cu(OH2)O61] were the best inhibitors in the Keggin and Dawson series, respectively, with IC50 of 9.63 ± 0.43 and 40.13 ± 0.61 μM, respectively. We conducted molecular docking study and found that the compound and α-glucosidase were mainly non-covalently interacting with hydrogen bonds and van der Waals forces. This result further confirmed the inhibition mechanism of enzyme kinetic experiments.
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21
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Misra A, Kozma K, Streb C, Nyman M. Jenseits von Ladungsausgleich: Gegenkationen in der Polyoxometallat‐Chemie. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905600] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Archismita Misra
- Anorganische Chemie I Universtität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - Karoly Kozma
- Department of Chemistry Oregon State University Corvallis OR 97331 USA
| | - Carsten Streb
- Anorganische Chemie I Universtität Ulm Albert-Einstein-Allee 11 89081 Ulm Deutschland
| | - May Nyman
- Department of Chemistry Oregon State University Corvallis OR 97331 USA
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22
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Rominger KM, Nestor G, Eriksson JE, Seisenbaeva GA, Kessler VG. Complexes of Keggin POMs [PM
12
O
40
]
3
–
(M = Mo, W) with GlyGly Peptide and Arginine – Crystal Structures and Solution Reactivity. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900611] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kayly M. Rominger
- Department of Molecular Sciences Swedish University of Agricultural Sciences Box 7015 75007 Uppsala Sweden
| | - Gustav Nestor
- Department of Molecular Sciences Swedish University of Agricultural Sciences Box 7015 75007 Uppsala Sweden
| | - Jan E. Eriksson
- Department of Molecular Sciences Swedish University of Agricultural Sciences Box 7015 75007 Uppsala Sweden
| | - Gulaim A. Seisenbaeva
- Department of Molecular Sciences Swedish University of Agricultural Sciences Box 7015 75007 Uppsala Sweden
| | - Vadim G. Kessler
- Department of Molecular Sciences Swedish University of Agricultural Sciences Box 7015 75007 Uppsala Sweden
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23
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Ly HGT, Mihaylov TT, Proost P, Pierloot K, Harvey JN, Parac‐Vogt TN. Chemical Mimics of Aspartate‐Directed Proteases: Predictive and Strictly Specific Hydrolysis of a Globular Protein at Asp−X Sequence Promoted by Polyoxometalate Complexes Rationalized by a Combined Experimental and Theoretical Approach. Chemistry 2019; 25:14370-14381. [DOI: 10.1002/chem.201902675] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Revised: 08/13/2019] [Indexed: 11/10/2022]
Affiliation(s)
- Hong Giang T. Ly
- Laboratory of Bioinorganic ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Tzvetan T. Mihaylov
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Paul Proost
- Laboratory of Molecular ImmunologyRega InstituteDepartment of Microbiology, Immunology, and TransplantationKU Leuven Herestraat 49 3000 Leuven Belgium
| | - Kristine Pierloot
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Jeremy N. Harvey
- Laboratory of Computational Coordination ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Tatjana N. Parac‐Vogt
- Laboratory of Bioinorganic ChemistryDepartment of ChemistryKU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
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25
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Fraqueza G, Fuentes J, Krivosudský L, Dutta S, Mal SS, Roller A, Giester G, Rompel A, Aureliano M. Inhibition of Na +/K +- and Ca 2+-ATPase activities by phosphotetradecavanadate. J Inorg Biochem 2019; 197:110700. [PMID: 31075720 DOI: 10.1016/j.jinorgbio.2019.110700] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/16/2019] [Accepted: 04/25/2019] [Indexed: 02/07/2023]
Abstract
Polyoxometalates (POMs) are promising inorganic inhibitors for P-type ATPases. The experimental models used to study the effects of POMs on these ATPases are usually in vitro models using vesicles from several membrane sources. Very recently, some polyoxotungstates, such as the Dawson anion [P2W18O62]6-, were shown to be potent P-type ATPase inhibitors; being active in vitro as well as in ex-vivo. In the present study we broaden the spectrum of highly active inhibitors of Na+/K+-ATPase from basal membrane of epithelial skin to the bi-capped Keggin-type anion phosphotetradecavanadate Cs5.6H3.4PV14O42 (PV14) and we confront the data with activity of other commonly encountered polyoxovanadates, decavanadate (V10) and monovanadate (V1). The X-ray crystal structure of PV14 was solved and contains two trans-bicapped α-Keggin anions HxPV14O42(9-x)-. The anion is built up from the classical Keggin structure [(PO4)@(V12O36)] capped by two [VO] units. PV14 (10 μM) exhibited higher ex-vivo inhibitory effect on Na+/K+-ATPase (78%) than was observed at the same concentrations of V10 (66%) or V1 (33%). Moreover, PV14 is also a potent in vitro inhibitor of the Ca2+-ATPase activity (IC50 5 μM) exhibiting stronger inhibition than the previously reported activities for V10 (15 μM) and V1 (80 μM). Putting it all together, when compared both P-typye ATPases it is suggested that PV14 exibited a high potential to act as an in vivo inhibitor of the Na+/K+-ATPase associated with chloride secretion.
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Affiliation(s)
- Gil Fraqueza
- ISE, University of Algarve, 8005-139 Faro, Portugal; CCMar, University of Algarve, 8005-139 Faro, Portugal
| | - Juan Fuentes
- CCMar, University of Algarve, 8005-139 Faro, Portugal
| | - Lukáš Krivosudský
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstr. 14, 1090 Wien, Austria; Comenius University, Faculty of Natural Sciences, Department of Inorganic Chemistry, Mlynská dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
| | - Saikat Dutta
- Department of Chemistry, National Institute of Technology Karnataka, Mangalore 575025, Karnataka, India
| | - Sib Sankar Mal
- Department of Chemistry, National Institute of Technology Karnataka, Mangalore 575025, Karnataka, India.
| | - Alexander Roller
- Universität Wien, Fakultät für Chemie, Zentrum für Röntgenstrukturanalyse, 1090 Wien, Austria
| | - Gerald Giester
- Universität Wien, Fakultät für Geowissenschaften, Geographie und Astronomie, Institut für Mineralogie und Kristallographie, 1090 Wien, Austria
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstr. 14, 1090 Wien, Austria.
| | - Manuel Aureliano
- CCMar, University of Algarve, 8005-139 Faro, Portugal; FCT, University of Algarve, 8005-139 Faro, Portugal.
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26
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Hu JJ, Wang L, Chen BN, Chi GX, Zhao MJ, Li Y. Transition Metal Substituted Polyoxometalates as α-Glucosidase Inhibitors. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900306] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jing-Jing Hu
- College of Food and Biological Engineering; Jimei University; 361021 Xiamen P.R. China
| | - Li Wang
- College of Food and Biological Engineering; Jimei University; 361021 Xiamen P.R. China
| | | | - Guo-Xiang Chi
- College of Food and Biological Engineering; Jimei University; 361021 Xiamen P.R. China
| | - Mei-Juan Zhao
- College of Food and Biological Engineering; Jimei University; 361021 Xiamen P.R. China
| | - Yue Li
- College of Food and Biological Engineering; Jimei University; 361021 Xiamen P.R. China
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27
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Solé-Daura A, Notario-Estévez A, Carbó JJ, Poblet JM, de Graaf C, Monakhov KY, López X. How Does the Redox State of Polyoxovanadates Influence the Collective Behavior in Solution? A Case Study with [I@V 18O 42] q- ( q = 3, 5, 7, 11, and 13). Inorg Chem 2019; 58:3881-3894. [PMID: 30830759 DOI: 10.1021/acs.inorgchem.8b03508] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of stable reduction-oxidation states of the cagelike [I@VIV xVV18- xO42]5- x polyoxovanadate (POV) with x = 8, 10, 12, 16, and 18 were studied with density functional theory and molecular dynamics to gain insight into the structural and electron distribution characteristics of these metal-oxo clusters and to analyze the charge/redox-dependent assemblage processes in water and acetonitrile (MeCN) solutions. The calculations show that the interplay between the POV redox state (molecular charge) and the solvent polarity, countercation size, and hydrophilicity (or hydrophobicity) controls the POV agglomeration phenomena, which substantially differ between aqueous and MeCN media. In MeCN, agglomeration is more pronounced for intermediate-charged POVs, whereas in water, the lowest-charged POVs and organic countercations tend to agglomerate into a microphase. Tests made on wet MeCN show diminished agglomeration with respect to pure MeCN. Simulations with alkali countercations in water show that only the highest-charged POV can form agglomerates. The herein presented theoretical investigation aims to support experimental studies of POVs in the field of functional nanomaterials and surfaces, where controlled molecular deposition from the liquid phase onto solid substrates requires knowledge about the features of these metal-oxo clusters in discrete solutions.
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Affiliation(s)
- Albert Solé-Daura
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Almudena Notario-Estévez
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Jorge J Carbó
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Josep M Poblet
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Coen de Graaf
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain.,Catalan Institution for Research and Advanced Studies (ICREA) , Passeig Lluís Companys 23 , 08010 Barcelona , Spain
| | - Kirill Yu Monakhov
- Leibniz Institute of Surface Engineering (IOM) , Permoserstraße 15 , 04318 Leipzig , Germany
| | - Xavier López
- Departament de Química Física i Inorgànica , Universitat Rovira i Virgili , Marcel·lí Domingo 1 , 43007 Tarragona , Spain
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28
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Julian I, Hueso JL, Lara N, Solé-Daurá A, Poblet JM, Mitchell SG, Mallada R, Santamaría J. Polyoxometalates as alternative Mo precursors for methane dehydroaromatization on Mo/ZSM-5 and Mo/MCM-22 catalysts. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01490j] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic stability and overall performance enhancement for the methane dehydroaromatization process using a combination of hexamolybdate species as Mo precursors and MCM-22 as catalysts support.
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Affiliation(s)
- Ignacio Julian
- Institute of Nanoscience of Aragon (INA) and Department of Chemical and Environmental Engineering
- University of Zaragoza
- 50018 Zaragoza
- Spain
- Institute of Materials Science of Aragon (ICMA)
| | - José L. Hueso
- Institute of Nanoscience of Aragon (INA) and Department of Chemical and Environmental Engineering
- University of Zaragoza
- 50018 Zaragoza
- Spain
- Institute of Materials Science of Aragon (ICMA)
| | - Nidya Lara
- Institute of Nanoscience of Aragon (INA) and Department of Chemical and Environmental Engineering
- University of Zaragoza
- 50018 Zaragoza
- Spain
| | - Albert Solé-Daurá
- Department of Química Física i Inorgànica
- Universitat Rovira I Virgili
- 43007 Tarragona
- Spain
| | - Josep M. Poblet
- Department of Química Física i Inorgànica
- Universitat Rovira I Virgili
- 43007 Tarragona
- Spain
| | - Scott G. Mitchell
- Institute of Materials Science of Aragon (ICMA)
- Consejo Superior de Investigaciones Científicas (CSIC) - University of Zaragoza
- 50009 Zaragoza
- Spain
- Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN)
| | - Reyes Mallada
- Institute of Nanoscience of Aragon (INA) and Department of Chemical and Environmental Engineering
- University of Zaragoza
- 50018 Zaragoza
- Spain
- Institute of Materials Science of Aragon (ICMA)
| | - Jesús Santamaría
- Institute of Nanoscience of Aragon (INA) and Department of Chemical and Environmental Engineering
- University of Zaragoza
- 50018 Zaragoza
- Spain
- Institute of Materials Science of Aragon (ICMA)
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29
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Van Rompuy LS, Parac-Vogt TN. Interactions between polyoxometalates and biological systems: from drug design to artificial enzymes. Curr Opin Biotechnol 2018; 58:92-99. [PMID: 30529815 DOI: 10.1016/j.copbio.2018.11.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 11/20/2018] [Indexed: 12/11/2022]
Abstract
Polyoxometalates have long been studied in a variety of biological applications. Interactions between the highly charged POM molecules and biological molecules frequently occur through hydrogen-bonding and electrostatic interactions. Tellurium-centred Anderson-Evans POMs show exceptional promise as crystallization agents, while acidic and metal-substituted POMs may provide interesting alternatives to enzymes in proteomics applications. While POMs also show interesting results in a number of medicinal applications, for example as anti-amyloid agents for the treatment of Alzheimer's disease and as anti-tumoral agents, their use is often impeded by their toxicity. Many recent studies have therefore focussed on POM-functionalization to reduce toxicity and increase activity by addition of biological targeting molecules.
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Affiliation(s)
- Laura S Van Rompuy
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Tatjana N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.
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30
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Vandebroek L, Mampaey Y, Antonyuk S, Van Meervelt L, Parac-Vogt TN. Noncovalent Complexes Formed between Metal-Substituted Polyoxometalates and Hen Egg White Lysozyme. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201801113] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Laurens Vandebroek
- Department of Chemistry; KU Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee (Leuven) Belgium
| | - Yentl Mampaey
- Department of Chemistry; KU Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee (Leuven) Belgium
| | - Svetlana Antonyuk
- Institute of Integrative Biology; University of Liverpool; Life Sciences Building, Crown Street L69 7ZB Liverpool UK
| | - Luc Van Meervelt
- Department of Chemistry; KU Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee (Leuven) Belgium
| | - Tatjana N. Parac-Vogt
- Department of Chemistry; KU Leuven; Celestijnenlaan 200F box 2404 3001 Heverlee (Leuven) Belgium
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31
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Vandebroek L, Van Meervelt L, Parac-Vogt TN. Direct observation of the ZrIV interaction with the carboxamide bond in a noncovalent complex between Hen Egg White Lysozyme and a Zr-substituted Keggin polyoxometalate. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2018; 74:1348-1354. [DOI: 10.1107/s2053229618010690] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 07/24/2018] [Indexed: 11/11/2022]
Abstract
The successful cocrystallization of the noncovalent complex formed between (Et2NH2)8[{α-PW11O39Zr-(μ-OH)(H2O)}2]·7H2O Keggin polyoxometalate (2) and Hen Egg White Lysozyme (HEWL) protein is reported. The resulting structural model revealed interaction between monomeric [Zr(PW11O39)]4−(1), which is a postulated catalytically active species, and the protein in two positions in the asymmetric unit. The first position (occupancy 36%) confirms the previously observed binding sites on the protein surface, whereas the second position (occupancy 14%) provides novel insights into the hydrolytic mechanisms of ZrIV-substituted polyoxometalates. The new interaction site occurs at the Asn65 residue, which is directly next to the Asp66–Gly67 peptide bond that was identified recently as a cleavage site in the polyoxometalate-catalysed hydrolysis of HEWL. Furthermore, in this newly discovered binding site, the monomeric polyoxometalate 1 is observed to bind directly to the side chain of the Asn65 residue. This binding of ZrIV as a Lewis-acid metal to the carbonyl O atom of the Asn65 side chain is very similar to the intermediate state proposed in density functional theory (DFT) studies in which ZrIV activates the peptide bond via interaction with its carbonyl O atom, and can be thus regarded as a model for interaction between ZrIV and a peptide bond.
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32
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Effect of [Zr(α-PW11O39)2]10− Polyoxometalate on the Self-Assembly of Surfactant Molecules in Water Studied by Fluorescence and DOSY NMR Spectroscopy. INORGANICS 2018. [DOI: 10.3390/inorganics6040112] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The catalytic fragmentation of hydrophobic proteins by polyoxometalates (POMs) requires the presence of surfactants in order to increase the solubility of the protein. Depending on the nature of the surfactant, different effects on the kinetics of protein hydrolysis are observed. As the molecular interactions between the POMs and surfactants in solutions have been scarcely explored, in this study, the interaction between the catalytically active Keggin polyoxometalate [Zr(α-PW11O39)2]10− and four different surfactants—sodium dodecyl sulfate (SDS), dodecyldimethyl(3-sulfopropyl)ammonium (Zw3-12), dodecyldimethyl(3-sulfopropyl) ammonium (CHAPS), and polyethylene glycol tert-octylphenyl ether (TX-100)—have been studied in aqueous media. The effect of polyoxometalate on the self-assembly of surfactant molecules into micelles and on the critical micellar concentration (CMC) has been examined by fluorescence spectroscopy and diffusion ordered NMR spectroscopy (DOSY).
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33
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Jayasinghe‐Arachchige VM, Hu Q, Sharma G, Paul TJ, Lundberg M, Quinonero D, Parac‐Vogt TN, Prabhakar R. Hydrolysis of chemically distinct sites of human serum albumin by polyoxometalate: A hybrid QM/MM (ONIOM) study. J Comput Chem 2018; 40:51-61. [DOI: 10.1002/jcc.25528] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 06/22/2018] [Accepted: 06/23/2018] [Indexed: 12/28/2022]
Affiliation(s)
| | - Qiaoyu Hu
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Gaurav Sharma
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Thomas J. Paul
- Department of Chemistry University of Miami Coral Gables Florida 33146
| | - Marcus Lundberg
- Department of Chemistry ‐ Ångström Laboratory Uppsala University 751 21, Uppsala Sweden
| | - David Quinonero
- Department of Chemistry Universitat de les Illes Balears Palma de Mallorca Spain
| | | | - Rajeev Prabhakar
- Department of Chemistry University of Miami Coral Gables Florida 33146
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34
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Maksimchuk NV, Maksimov GM, Evtushok VY, Ivanchikova ID, Chesalov YA, Maksimovskaya RI, Kholdeeva OA, Solé-Daura A, Poblet JM, Carbó JJ. Relevance of Protons in Heterolytic Activation of H2O2 over Nb(V): Insights from Model Studies on Nb-Substituted Polyoxometalates. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02761] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nataliya V. Maksimchuk
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia
| | | | - Vasilii Yu. Evtushok
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia
| | | | - Yuriy A. Chesalov
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia
| | | | - Oxana A. Kholdeeva
- Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia
| | - Albert Solé-Daura
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43005 Tarragona, Spain
| | - Josep M. Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43005 Tarragona, Spain
| | - Jorge J. Carbó
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, 43005 Tarragona, Spain
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35
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Bijelic A, Rompel A. Polyoxometalates: more than a phasing tool in protein crystallography. CHEMTEXTS 2018; 4:10. [PMID: 30596006 PMCID: PMC6294228 DOI: 10.1007/s40828-018-0064-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/06/2018] [Indexed: 01/18/2023]
Abstract
Protein crystallography is the most widely used method for determining the molecular structure of proteins and obtaining structural information on protein–ligand complexes at the atomic level. As the structure determines the functions and properties of a protein, crystallography is of immense importance for nearly all research fields related to biochemistry. However, protein crystallography suffers from some major drawbacks, whereby the unpredictability of the crystallization process represents the main bottleneck. Crystallization is still more or less a ‘trial and error’ based procedure, and therefore, very time and resource consuming. Many strategies have been developed in the past decades to improve or enable the crystallization of proteins, whereby the use of so-called additives, which are mostly small molecules that make proteins more amenable to crystallization, is one of the most convenient and successful methods. Most of the commonly used additives are, however, restricted to particular crystallization conditions or groups of proteins. Therefore, a more universal additive addressing a wider range of proteins and being applicable to a broad spectrum of crystallization conditions would represent a significant advance in the field of protein crystallography. In recent years, polyoxometalates (POMs) emerged as a promising group of crystallization additives due to their unique structures and properties. In this regard, the tellurium-centered Anderson–Evans polyoxotungstate [TeW6O24]6− (TEW) showed its high potential as crystallization additive. In this lecture text, the development of POMs as tools in protein crystallography are discussed with a special focus on the so far most successful cluster TEW.
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Affiliation(s)
- Aleksandar Bijelic
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Vienna, Austria
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Vienna, Austria
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36
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Vandebroek L, De Zitter E, Ly HGT, Conić D, Mihaylov T, Sap A, Proost P, Pierloot K, Van Meervelt L, Parac-Vogt TN. Protein-Assisted Formation and Stabilization of Catalytically Active Polyoxometalate Species. Chemistry 2018; 24:10099-10108. [PMID: 29797738 DOI: 10.1002/chem.201802052] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Revised: 05/17/2018] [Indexed: 01/24/2023]
Abstract
The effect of the protein environment on the formation and stabilization of an elusive catalytically active polyoxometalate (POM) species, K6 [Hf(α2 -P2 W17 O61 )] (1), is reported. In the co-crystal of hen egg-white lysozyme (HEWL) with 1, the catalytically active monomeric species is observed, originating from the dimeric 1:2 POM form, while it is intrinsically unstable under physiological pH conditions. The protein-assisted dissociation of the dimeric POM was rationalized by means of DFT calculations. The dissociation process is unfavorable in bulk water, but becomes favorable in the protein-POM complex due to the low dielectric response at the protein surface. The crystal structure shows that the monomeric form is stabilized by electrostatic and water-mediated hydrogen bonding interactions with the protein. It interacts at three distinct sites, close to the aspartate-containing hydrolysis sites, demonstrating high selectivity towards peptide bonds containing this residue.
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Affiliation(s)
- Laurens Vandebroek
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Elke De Zitter
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Hong Giang Thi Ly
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Dragan Conić
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Tzvetan Mihaylov
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Annelies Sap
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Paul Proost
- Department of Microbiology and Immunology, Rega Institute, Herestraat 49 box 1042, 3000, Leuven, Belgium
| | - Kristine Pierloot
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
| | - Tatjana N Parac-Vogt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F box 2404, 3001, Leuven, Belgium
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37
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Paul TJ, Parac-Vogt TN, Quiñonero D, Prabhakar R. Investigating Polyoxometalate–Protein Interactions at Chemically Distinct Binding Sites. J Phys Chem B 2018; 122:7219-7232. [DOI: 10.1021/acs.jpcb.8b02931] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Thomas J. Paul
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | | | - David Quiñonero
- Department of Chemistry, Universitat de les Illes Balears, Palma de Mallorca 07122, Spain
| | - Rajeev Prabhakar
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
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38
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Ventura D, Calderan A, Honisch C, Krol S, Serratì S, Bonchio M, Carraro M, Ruzza P. Synthesis and biological activity of anAnderson polyoxometalate bis‐functionalized with aBombesin‐analog peptide. Pept Sci (Hoboken) 2018. [DOI: 10.1002/pep2.24047] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Daniele Ventura
- Department of Chemical SciencesUniversity of Padua, and Institute on Membrane Technology of CNRPadua Italy
| | - Andrea Calderan
- Institute of Biomolecular Chemistry of CNR, Padua UnitPadua Italy
| | - Claudia Honisch
- Institute of Biomolecular Chemistry of CNR, Padua UnitPadua Italy
| | - Silke Krol
- Laboratory of translational NanotechnologyIRCCS Oncologic Institute “Giovanni Paolo II”, Viale O. Flacco 65Bari70124 Italy
- NanoMed lab, Fondazione IRCCS Institute of Neurology “Carlo Besta”, via Amadeo 42Milan20133 Italy
| | - Simona Serratì
- Laboratory of translational NanotechnologyIRCCS Oncologic Institute “Giovanni Paolo II”, Viale O. Flacco 65Bari70124 Italy
| | - Marcella Bonchio
- Department of Chemical SciencesUniversity of Padua, and Institute on Membrane Technology of CNRPadua Italy
| | - Mauro Carraro
- Department of Chemical SciencesUniversity of Padua, and Institute on Membrane Technology of CNRPadua Italy
| | - Paolo Ruzza
- Institute of Biomolecular Chemistry of CNR, Padua UnitPadua Italy
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39
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Nikoloudakis E, Karikis K, Laurans M, Kokotidou C, Solé-Daura A, Carbó JJ, Charisiadis A, Charalambidis G, Izzet G, Mitraki A, Douvas AM, Poblet JM, Proust A, Coutsolelos AG. Self-assembly study of nanometric spheres from polyoxometalate-phenylalanine hybrids, an experimental and theoretical approach. Dalton Trans 2018; 47:6304-6313. [DOI: 10.1039/c8dt00380g] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyoxometalate-amino acid hybrids (POM-FandPOM-FF) self-assemble into spherical architectures with high reproducibility in several “good–bad” solvent mixtures.
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40
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Skobelev IY, Evtushok VY, Kholdeeva OA, Maksimchuk NV, Maksimovskaya RI, Ricart JM, Poblet JM, Carbó JJ. Understanding the Regioselectivity of Aromatic Hydroxylation over Divanadium-Substituted γ-Keggin Polyoxotungstate. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02694] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Igor Y. Skobelev
- Boreskov Institute of Catalysis, Lavrentiev ave. 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova
str. 2, Novosibirsk 630090, Russia
| | - Vasiliy Yu. Evtushok
- Boreskov Institute of Catalysis, Lavrentiev ave. 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova
str. 2, Novosibirsk 630090, Russia
| | - Oxana A. Kholdeeva
- Boreskov Institute of Catalysis, Lavrentiev ave. 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova
str. 2, Novosibirsk 630090, Russia
| | - Nataliya V. Maksimchuk
- Boreskov Institute of Catalysis, Lavrentiev ave. 5, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova
str. 2, Novosibirsk 630090, Russia
| | | | - Josep M. Ricart
- Department
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Josep M. Poblet
- Department
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Jorge J. Carbó
- Department
de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, 43007 Tarragona, Spain
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41
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Moussawi MA, Haouas M, Floquet S, Shepard WE, Abramov PA, Sokolov MN, Fedin VP, Cordier S, Ponchel A, Monflier E, Marrot J, Cadot E. Nonconventional Three-Component Hierarchical Host–Guest Assembly Based on Mo-Blue Ring-Shaped Giant Anion, γ-Cyclodextrin, and Dawson-type Polyoxometalate. J Am Chem Soc 2017; 139:14376-14379. [DOI: 10.1021/jacs.7b08058] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Mhamad Aly Moussawi
- Institut
Lavoisier de Versailles UMR 8180, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - Mohamed Haouas
- Institut
Lavoisier de Versailles UMR 8180, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - Sébastien Floquet
- Institut
Lavoisier de Versailles UMR 8180, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - William E. Shepard
- Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubain BP 48, 91192 Gif-sur-Yvette CEDEX, France
| | - Pavel A. Abramov
- Nikolaev
Institute of Inorganic Chemistry SB RAS, Novosibirsk State University, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Maxim N. Sokolov
- Nikolaev
Institute of Inorganic Chemistry SB RAS, Novosibirsk State University, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Vladimir P. Fedin
- Nikolaev
Institute of Inorganic Chemistry SB RAS, Novosibirsk State University, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Stéphane Cordier
- Institut
des Sciences Chimique de Rennes UMR 6226, Université de Rennes 1, 35000 Rennes, France
| | - Anne Ponchel
- Université
Artois, CNRS, Centrale Lille, ENSCL, Université de Lille, UMR 8181, Unité de Catalyse et Chimie du Solide, 62300 Lens, France
| | - Eric Monflier
- Université
Artois, CNRS, Centrale Lille, ENSCL, Université de Lille, UMR 8181, Unité de Catalyse et Chimie du Solide, 62300 Lens, France
| | - Jérôme Marrot
- Institut
Lavoisier de Versailles UMR 8180, UVSQ, Université Paris-Saclay, 78035 Versailles, France
| | - Emmanuel Cadot
- Institut
Lavoisier de Versailles UMR 8180, UVSQ, Université Paris-Saclay, 78035 Versailles, France
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42
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Marques MPM, Gianolio D, Ramos S, Batista de Carvalho LAE, Aureliano M. An EXAFS Approach to the Study of Polyoxometalate-Protein Interactions: The Case of Decavanadate-Actin. Inorg Chem 2017; 56:10893-10903. [PMID: 28858484 DOI: 10.1021/acs.inorgchem.7b01018] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
EXAFS and XANES experiments were used to assess decavanadate interplay with actin, in both the globular and polymerized forms, under different conditions of pH, temperature, ionic strength, and presence of ATP. This approach allowed us to simultaneously probe, for the first time, all vanadium species present in the system. It was established that decavanadate interacts with G-actin, triggering a protein conformational reorientation that induces oxidation of the cysteine core residues and oxidovanadium (VIV) formation. The local environment of vanadium's absorbing center in the [decavanadate-protein] adducts was determined, a V-SCys coordination having been verified experimentally. The variations induced in decavanadate's EXAFS profile by the presence of actin were found to be almost totally reversed by the addition of ATP, which constitutes a solid proof of decavanadate interaction with the protein at its ATP binding site. Additionally, a weak decavanadate interplay with F-actin was suggested to take place, through a mechanism different from that inferred for globular actin. These findings have important consequences for the understanding, at a molecular level, of the significant biological activities of decavanadate and similar polyoxometalates, aiming at potential pharmacological applications.
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Affiliation(s)
- M Paula M Marques
- "Química-Física Molecular" R&D Unit, Department of Chemistry, University of Coimbra , 3004-535 Coimbra, Portugal
- Department of Life Sciences, University of Coimbra , 3000-456 Coimbra, Portugal
| | - Diego Gianolio
- Diamond Light Source, Harwell Science & Innovation Campus , Didcot OX11 0DE, United Kingdom
| | - Susana Ramos
- UCIBIO, REQUIMTE, Departamento de Química, Universidade Nova de Lisboa , 2829-516 Caparica, Portugal
| | - Luís A E Batista de Carvalho
- "Química-Física Molecular" R&D Unit, Department of Chemistry, University of Coimbra , 3004-535 Coimbra, Portugal
| | - Manuel Aureliano
- "Química-Física Molecular" R&D Unit, Department of Chemistry, University of Coimbra , 3004-535 Coimbra, Portugal
- FCT and CCmar, University of Algarve , 8005-139 Faro, Portugal
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43
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Čolović MB, Medić B, Ćetković M, Kravić Stevović T, Stojanović M, Ayass WW, Mougharbel AS, Radenković M, Prostran M, Kortz U, Krstić DZ. Toxicity evaluation of two polyoxotungstates with anti-acetylcholinesterase activity. Toxicol Appl Pharmacol 2017; 333:68-75. [PMID: 28830837 DOI: 10.1016/j.taap.2017.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 08/16/2017] [Accepted: 08/18/2017] [Indexed: 10/19/2022]
Abstract
A toxicity evaluation of two Keggin-type heteropolytungstates, K7[Ti2PW10O40]·6H2O and K6H[SiV3W9O40]·3H2O, with different inhibitory potencies toward acetylcholinesterase activity (IC50 values of 1.04×10-6 and 4.80×10-4mol/L, respectively) was performed. Wistar albino rats were orally treated with single doses (5 and 50mg/kg) of both investigated compounds. The biochemical parameters of renal (serum urea and creatinine) and liver function (direct and total bilirubin, alanine transaminase, and aspartate aminotransferase) were determined after 24h and 14days. A histopathological analysis of liver tissue was carried out 14days after the polyoxotungstate administration. Both applied doses of the investigated compounds did not induce statistically significant alterations of the renal function markers. However, the polyoxotungstate treatment caused an increase in the activities of serum alanine transaminase and aspartate aminotransferase in a time- and concentration-dependent manner, although statistically significant changes in bilirubin concentrations were not observed. Furthermore, the detected hepatotoxic effect was confirmed by histhopathological analysis that suggested some reversible liver tissue damage two weeks after the treatment, especially in the case of K6H[SiV3W9O40]·3H2O. Accordingly, the toxicity of these two polyoxotungstates with anti-acetylcholinesterase effect cannot be considered as a severe one, but their potential clinical application would require a more complex toxicological study.
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Affiliation(s)
- Mirjana B Čolović
- Department of Physical Chemistry, "Vinča" Institute of Nuclear Sciences, University of Belgrade, Serbia
| | - Branislava Medić
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Mila Ćetković
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Serbia
| | - Tamara Kravić Stevović
- Institute of Histology and Embryology, Faculty of Medicine, University of Belgrade, Serbia
| | - Marko Stojanović
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Wassim W Ayass
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Ali S Mougharbel
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany
| | - Miroslav Radenković
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Milica Prostran
- Department of Pharmacology, Clinical Pharmacology and Toxicology, Faculty of Medicine, University of Belgrade, Serbia
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry, Jacobs University, Bremen, Germany.
| | - Danijela Z Krstić
- Institute of Medical Chemistry, Faculty of Medicine, University of Belgrade, Serbia.
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44
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Jiménez-Lozano P, Solé-Daura A, Wipff G, Poblet JM, Chaumont A, Carbó JJ. Assembly Mechanism of Zr-Containing and Other TM-Containing Polyoxometalates. Inorg Chem 2017; 56:4148-4156. [DOI: 10.1021/acs.inorgchem.7b00096] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pablo Jiménez-Lozano
- Departament de Química
Inorgànica i Física, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Albert Solé-Daura
- Departament de Química
Inorgànica i Física, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Georges Wipff
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie, Université de Strasbourg, 1, rue B. Pascal, 6700 Strasbourg, France
| | - Josep M. Poblet
- Departament de Química
Inorgànica i Física, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain
| | - Alain Chaumont
- Laboratoire MSM, UMR CNRS 7177, Institut de Chimie, Université de Strasbourg, 1, rue B. Pascal, 6700 Strasbourg, France
| | - Jorge J. Carbó
- Departament de Química
Inorgànica i Física, Universitat Rovira i Virgili, Campus Sescelades, Marcel·lí Domingo s/n, 43007 Tarragona, Spain
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45
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Lang Z, Aparicio-Anglès X, Weinstock I, Clotet A, Poblet JM. Counterintuitive Adsorption of [PW11O39]7– on Au(100). Inorg Chem 2017; 56:3961-3969. [DOI: 10.1021/acs.inorgchem.6b03035] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zhongling Lang
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | | | - Ira Weinstock
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, P.B. Box 653, Beer Sheva 84105, Israel
| | - Anna Clotet
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Josep M. Poblet
- Departament de Química
Física i Inorgànica, Universitat Rovira i Virgili, c/Marcel·lí Domingo 1, 43007 Tarragona, Spain
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46
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Molitor C, Bijelic A, Rompel A. In situ formation of the first proteinogenically functionalized [TeW 6O 24O 2(Glu)] 7- structure reveals unprecedented chemical and geometrical features of the Anderson-type cluster. Chem Commun (Camb) 2016; 52:12286-12289. [PMID: 27722437 PMCID: PMC5066560 DOI: 10.1039/c6cc07004c] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 09/06/2016] [Indexed: 11/21/2022]
Abstract
The chemistry of polyoxometalates (POMs) in a protein environment is an almost unexplored but highly relevant research field as important biological and pharmacological attributes of certain POMs are based on their interactions with proteins. We report on the A-type Anderson-Evans polyoxotungstate, [TeW6O24]6- (TEW), mediated crystallization of Coreopsis grandiflora aurone synthase (cgAUS1) using ∼0.24 mM protein and 1.0 mM TEW. The 1.78 Å crystal structure reveals the covalent binding of TEW to the protein under the formation of an unprecedented polyoxotungstate cluster, [TeW6O24O2(Glu)]7- (GluTEW). The polyoxotungstate-protein complex exhibits the first covalent bond between a protein and the A-type Anderson-Evans cluster, an archetype where up to now no hybrid structures exist. The polyoxotungstate is modified at two of its six addenda tungsten atoms, which covalently bind to the carboxylic oxygen atoms of glutamic acid (Glu157), leading to W-O distances of ∼2.35 Å. This ligand substitution reaction is accompanied by a reduction of the coordination number of two μ3 polyoxotungstate oxygen atoms. This is so far unique since all known hybridizations of the Anderson-Evans POM with organic units have been obtained via the functionalization of the B-type Anderson-Evans structure through its bridging oxygen atoms. The structure reported here proves the reactivity of this POM archetype's addenda atoms as it has been administered into the protein solution as a pre-assembled cluster. Moreover, the novel cluster [TeW6O24O2(Glu)]7- displays the great versatility of the Anderson-Evans POM class.
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Affiliation(s)
- Christian Molitor
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria.
| | - Aleksandar Bijelic
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria.
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria.
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