1
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Salazar Marcano DE, Lentink S, Chen JJ, Anyushin AV, Moussawi MA, Bustos J, Van Meerbeek B, Nyman M, Parac-Vogt TN. Supramolecular Self-Assembly of Proteins Promoted by Hybrid Polyoxometalates. Small 2024:e2312009. [PMID: 38213017 DOI: 10.1002/smll.202312009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Indexed: 01/13/2024]
Abstract
Controlling the formation of supramolecular protein assemblies and endowing them with new properties that can lead to novel functional materials is an important but challenging task. In this work, a new hybrid polyoxometalate is designed to induce controlled intermolecular bridging between biotin-binding proteins. Such bridging interactions lead to the formation of supramolecular protein assemblies incorporating metal-oxo clusters that go from several nanometers in diameter up to the micron range. Insights into the self-assembly process and the nature of the resulting biohybrid materials are obtained by a combination of Small Angle X-ray Scattering (SAXS), Transmission Electron Microscopy (TEM), and Dynamic Light Scattering (DLS), along with fluorescence, UV-vis, and Circular Dichroism (CD) spectroscopy. The formation of hybrid supramolecular assemblies is determined to be driven by biotin binding to the protein and electrostatic interactions between the anionic metal-oxo cluster and the protein, both of which also influence the stability of the resulting assemblies. As a result, the rate of formation, size, and stability of the supramolecular assemblies can be tuned by controlling the electrostatic interactions between the cluster and the protein (e.g., through varying the ionic strength of the solution), thereby paving the way toward biomaterials with tunable assembly and disassembly properties.
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Affiliation(s)
| | - Sarah Lentink
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Jieh-Jang Chen
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | | | - Mhamad Aly Moussawi
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, 3001, Belgium
| | - Jenna Bustos
- Department of Chemistry, Oregon State University, Corvallis, OR, 97331, USA
| | - Bart Van Meerbeek
- Department of Oral Health Sciences, BIOMAT & UZ Leuven, Dentistry, KU Leuven, Kapucijnenvoer 7, Leuven, 3000, Belgium
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, OR, 97331, USA
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2
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Barba-Bon A, Gumerova NI, Tanuhadi E, Ashjari M, Chen Y, Rompel A, Nau WM. All-Inorganic Polyoxometalates Act as Superchaotropic Membrane Carriers. Adv Mater 2024; 36:e2309219. [PMID: 37943506 DOI: 10.1002/adma.202309219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 10/30/2023] [Indexed: 11/10/2023]
Abstract
Polyoxometalates (POMs) are known antitumoral, antibacterial, antiviral, and anticancer agents and considered as next-generation metallodrugs. Herein, a new biological functionality in neutral physiological media, where selected mixed-metal POMs are sufficiently stable and able to affect membrane transport of impermeable, hydrophilic, and cationic peptides (heptaarginine, heptalysine, protamine, and polyarginine) is reported. The uptake is observed in both, model membranes as well as cells, and attributed to the superchaotropic properties of the polyoxoanions. In view of the structural diversity of POMs these findings pave the way toward their biomedical application in drug delivery or for cell-biological uptake studies with biological effector molecules or staining agents.
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Affiliation(s)
- Andrea Barba-Bon
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Nadiia I Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Josef-Holaubek-Platz 2, Wien, 1090, Austria
| | - Elias Tanuhadi
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Josef-Holaubek-Platz 2, Wien, 1090, Austria
| | - Maryam Ashjari
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Yao Chen
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Josef-Holaubek-Platz 2, Wien, 1090, Austria
| | - Werner M Nau
- School of Science, Constructor University, Campus Ring 1, 28759, Bremen, Germany
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3
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Lin S, Li J, Zhou F, Tan BK, Zheng B, Hu J. K 6[P 2Mo 18O 62] as DNase-Mimetic Artificial Nucleases to Promote Extracellular Deoxyribonucleic Acid Degradation in Bacterial Biofilms. ACS Omega 2023; 8:33966-33974. [PMID: 37744825 PMCID: PMC10515355 DOI: 10.1021/acsomega.3c04790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 08/25/2023] [Indexed: 09/26/2023]
Abstract
In the current study, the DNase-like activity of the Dawson-type polyoxometalate K6[P2Mo18O62] was explored. The obtained findings demonstrated that K6[P2Mo18O62] could effectively cleave phosphoester bonds in the DNA model substrate (4-nitrophenyl phosphate) and result in the degradation of plasmid DNA. Moreover, the application potential of this Dawson-type polyoxometalate as a DNase-mimetic artificial enzyme to degrade extracellular DNA (eDNA) in Escherichia coli (E. coli) bacterial biofilm was explored. The results demonstrated that K6[P2Mo18O62] exhibited high cleavage ability toward eDNA secreted by E. coli and thus eradicated the bacterial biofilm. In conclusion, Dawson-type polyoxometalate K6[P2Mo18O62] possessed desirable DNase-like activity, which could serve as a bacterial biofilm eradication agent by cleaving and degrading eDNA molecules.
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Affiliation(s)
- Shaoling Lin
- College
of Food Science, Fujian Agriculture and
Forestry University, Fuzhou 350002, China
| | - Jing Li
- College
of Food Science, Fujian Agriculture and
Forestry University, Fuzhou 350002, China
| | - Feng Zhou
- College
of Food Science, Fujian Agriculture and
Forestry University, Fuzhou 350002, China
| | - Bee K. Tan
- College
of Life Sciences, University of Leicester, Leicester LE1 7RH, U.K.
| | - Baodong Zheng
- College
of Food Science, Fujian Agriculture and
Forestry University, Fuzhou 350002, China
| | - Jiamiao Hu
- College
of Food Science, Fujian Agriculture and
Forestry University, Fuzhou 350002, China
- College
of Life Sciences, University of Leicester, Leicester LE1 7RH, U.K.
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4
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Makita H, Zhang M, Yano J, Kern J. Room temperature crystallography and X-ray spectroscopy of metalloenzymes. Methods Enzymol 2023; 688:307-348. [PMID: 37748830 PMCID: PMC10799221 DOI: 10.1016/bs.mie.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
The ultrashort (10s of femtoseconds) X-ray pulses generated by X-ray free electron lasers enable the measurement of X-ray diffraction and spectroscopic data from radiation-sensitive metalloenzymes at room temperature while mostly avoiding the effects of radiation damage usually encountered when performing such experiments at synchrotron sources. Here we discuss an approach to measure both X-ray emission and X-ray crystallographic data at the same time from the same sample volume. The droplet-on-tape setup described allows for efficient sample use and the integration of different reaction triggering options in order to conduct time-resolved studies with limited sample amounts. The approach is illustrated by two examples, photosystem II that catalyzes the light-driven oxidation of water to oxygen, and isopenicillin N synthase, an enzyme that catalyzes the double ring cyclization of a tripeptide precursor into the β-lactam isopenicillin and can be activated by oxygen exposure. We describe the necessary steps to obtain microcrystals of both proteins as well as the operation procedure for the drop-on-tape setup and details of the data acquisition and processing involved in this experiment. At the end, we present how the combination of time-resolved X-ray emission spectra and diffraction data can be used to improve the knowledge about the enzyme reaction mechanism.
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Affiliation(s)
- Hiroki Makita
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Miao Zhang
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
| | - Junko Yano
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States.
| | - Jan Kern
- Molecular Biophysics and Integrated Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States.
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5
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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6
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Tolbatov I, Marrone A, Shepard W, Chiaverini L, Upadhyay Kahaly M, La Mendola D, Marzo T, Ciccone L. Inorganic Drugs as a Tool for Protein Structure Solving and Studies on Conformational Changes. Chemistry 2023; 29:e202202937. [PMID: 36477932 DOI: 10.1002/chem.202202937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 12/07/2022] [Accepted: 12/07/2022] [Indexed: 12/12/2022]
Abstract
Inorganic drugs are capable of tight interactions with proteins through coordination towards aminoacidic residues, and this feature is recognized as a key aspect for their pharmacological action. However, the "protein metalation process" is exploitable for solving the phase problem and structural resolution. In fact, the use of inorganic drugs bearing specific metal centers and ligands capable to drive the binding towards the desired portions of the protein target could represent a very intriguing and fruitful strategy. In this context, a theoretical approach may further contribute to solve protein structures and their refinement. Here, we delineate the main features of a reliable experimental-theoretical integrated approach, based on the use of metallodrugs, for protein structure solving.
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Affiliation(s)
- Iogann Tolbatov
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007, Tarragona, Spain
| | - Alessandro Marrone
- Department of Pharmacy, University "G. D'Annunzio" Chieti-Pescara, Via dei Vestini, 31, 66100, Chieti, Italy
| | - William Shepard
- Department PROXIMA2 A, Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192, Gif-sur-Yvette, France
| | - Lorenzo Chiaverini
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126, Pisa, Italy
| | | | - Diego La Mendola
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126, Pisa, Italy
| | - Tiziano Marzo
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126, Pisa, Italy
| | - Lidia Ciccone
- Department of Pharmacy, University of Pisa, Via Bonanno 6, 56126, Pisa, Italy
- Department PROXIMA2 A, Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192, Gif-sur-Yvette, France
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7
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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8
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Shao Y, Yang Z. Progress in polymer single-chain based hybrid nanoparticles. Prog Polym Sci 2022; 133:101593. [DOI: 10.1016/j.progpolymsci.2022.101593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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9
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Chen Q, Wang MM, Zhang Y, Zhang DD. Selective Adsorption of Hemoglobin in Human Whole Blood with a Nickel Monosubstituted Silicotungstic Acid Hybrid. ACS Omega 2022; 7:22633-22638. [PMID: 35811926 PMCID: PMC9260775 DOI: 10.1021/acsomega.2c01997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Accepted: 06/07/2022] [Indexed: 06/15/2023]
Abstract
A nickel monosubstituted polyoxometalate (POM)/polyaniline organic-inorganic hybrid SiW11Ni/PANI was synthesized using the liquid-phase method at room temperature to achieve the solidification of water-soluble POMs. The SiW11Ni/PANI hybrid was characterized by scanning electron microscopy, thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, and zeta potential. On the basis of π-π stacking and affinity interaction between the SiW11Ni/PANI hybrid and proteins, the SiW11Ni/PANI hybrid showed good adsorption selectivity to hemoglobin (Hb). At pH 7.0, 0.5 mg of SiW11Ni/PANI resulted in an adsorption efficiency of 92.4% for 1 mL of 100 μg mL-1 Hb. The adsorption behavior of Hb on the surface of the hybrid fitted with the Langmuir model, and the maximum adsorption capacity was 692 mg g-1. The adsorbed Hb was eluted by BR (0.04 mol L-1, pH 9), providing a recovery of 94%. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis assay results indicated that the Hb in human whole blood could selectively be adsorbed by the SiW11Ni/PANI hybrid, and the obtained Hb was with high purity. It could expand the application of POMs in life science due to the application of the POM hybrid in protein isolation/purification.
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Affiliation(s)
- Qing Chen
- Department
of Pharmacy, Shenyang Medical College, Shenyang 110034, China
| | - Meng-Meng Wang
- Department
of Pharmacy, Shenyang Medical College, Shenyang 110034, China
| | - Yang Zhang
- Department
of Pharmacy, Shenyang Medical College, Shenyang 110034, China
| | - Dan-Dan Zhang
- Department
of Public Health, Shenyang Medical College, Shenyang 110034, China
- Public
Health Laboratory Centre, Shenyang Medical
College, Shenyang 110034, China
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10
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Zhang Y, Zhang D, Wu X, Song R, Zhang X, Wang M, He S, Chen Q. A Novel Anderson-Evans Polyoxometalate-based Metal-organic Framework Composite for the Highly Selective Isolation and Purification of Cytochrome C from Porcine Heart. Colloids Surf B Biointerfaces 2022; 213:112420. [PMID: 35227995 DOI: 10.1016/j.colsurfb.2022.112420] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/28/2022] [Accepted: 02/17/2022] [Indexed: 11/24/2022]
Abstract
Anderson-Evans type polyoxometalate group (Na6[TeW6O24]·22 H2O, TeW6) was combined with porous metal-organic framework ZIF-8 by electrostatic interaction to obtain a novel Anderson-Evans polyoxometalate-based metal-organic framework composite, TeW6 @ZIF-8. FT-IR, Raman, XRD, TG, DSC, SEM, and TEM were used to characterize the composite. It was proved that the Anderson-Evans type polyoxometalate group TeW6 was successfully hybridized with metal-organic framework ZIF-8, and the composite possesses good stability. Based on the potential interaction between TeW6 and proteins and the coordination between imidazole groups in ZIF-8 and proteins with a porphyrin ring structure, the adsorption selectivity towards different proteins on the TeW6 @ZIF-8 composite was studied in this work. The experiment results showed that the TeW6 @ZIF-8 composite was selectively adsorbed to cytochrome C. At pH 11.0, the adsorption efficiency of 94.01% was obtained for processing 1.0 mL 100 μg mL-1 cytochrome C with 3.0 mg TeW6 @ZIF-8 composite. The adsorption behavior of cytochrome C fits well with the Langmuir adsorption model, corresponding to a theoretical adsorption capacity of 232.56 mg g-1. The retained cytochrome C could be readily recovered by 1% SDS (m/m), giving rise to a recovery of 65.6%. Circular dichroism spectra indicate no conformational change for cytochrome C after the adsorption and desorption processes, demonstrating the favorable biocompatibility of TeW6 @ZIF-8 composite. In applying practical samples, SDS-PAGE results showed that cytochrome C was successfully isolated and purified by TeW6 @ZIF-8 composite from porcine heart protein extract, which is further identified with LC-MS/MS. Thus, a new strategy for separating and purifying cytochrome C from the porcine heart using TeW6 @ZIF-8 composite as an adsorbent was established.
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Affiliation(s)
- Yang Zhang
- School of Pharmacy, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Dandan Zhang
- School of Public Health, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Xi Wu
- College of Chemistry, Liaoning University, Shenyang 110036, People's Republic of China
| | - Ruizhi Song
- School of Pharmacy, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Xiaonan Zhang
- Translational Medicine Research Centre, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Mengmeng Wang
- School of Pharmacy, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Shaoheng He
- Translational Medicine Research Centre, Shenyang Medical College, Shenyang 110034, People's Republic of China
| | - Qing Chen
- School of Pharmacy, Shenyang Medical College, Shenyang 110034, People's Republic of China; Translational Medicine Research Centre, Shenyang Medical College, Shenyang 110034, People's Republic of China.
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11
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Abstract
Polyoxometalates (POMs) are a class of metal oxide complexes with a large structural diversity. Effective control of the final chemical and physical properties of POMs could be provided by fine-tuning chemical modifications, such as the inclusion of other metals or non-metal ions. In addition, the nature and type of the counterion can also impact POM properties, like solubility. Besides, POMs may combine with carbon materials as graphene oxide, reduced graphene oxide or carbon nanotubes to enhance electronic conductivity, with noble metal nanoparticles to increase catalytic and functional sites, be introduced into metal-organic frameworks to increase surface area and expose more active sites, and embedded into conducting polymers. The possibility to design POMs to match properties adequate for specific sensing applications turns them into highly desirable chemicals for sensor sensitive layers. This review intends to provide an overview of POM structures used in sensors (electrochemical, optical, and piezoelectric), highlighting their main functional features. Furthermore, this review aims to summarize the reported applications of POMs in sensors for detecting and determining analytes in different matrices, many of them with biochemical and clinical relevance, along with analytical figures of merit and main virtues and problems of such devices. Special emphasis is given to the stability of POMs sensitive layers, detection limits, selectivity, the pH working range and throughput.
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Affiliation(s)
- Marta I. S. Veríssimo
- CESAM, Department of Chemistry, University of Aveiro, Aveiro, Portugal
- *Correspondence: Marta I. S. Veríssimo, ; M. Teresa S. R. Gomes,
| | | | - M. Teresa S. R. Gomes
- CESAM, Department of Chemistry, University of Aveiro, Aveiro, Portugal
- *Correspondence: Marta I. S. Veríssimo, ; M. Teresa S. R. Gomes,
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12
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Yekwa EL, Serrano FA, Yukl E. Conformational flexibility in the zinc solute-binding protein ZnuA. Acta Crystallogr F Struct Biol Commun 2022; 78:128-134. [PMID: 35234138 PMCID: PMC8900738 DOI: 10.1107/s2053230x22001662] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Accepted: 02/10/2022] [Indexed: 11/10/2022] Open
Abstract
Zinc is an essential metal for all kingdoms of life, making its transport across the cell membrane a critical function. In bacteria, high-affinity zinc import is accomplished by ATP-binding cassette (ABC) transporters, which rely on extracellular solute-binding proteins (SBPs) of cluster A-I to acquire the metal and deliver it to the membrane permease. These systems are important for survival and virulence, making them attractive targets for the development of novel antibiotics. Citrobacter koseri is an emerging pathogen with extensive antibiotic resistance. High-affinity zinc binding to the C. koseri cluster A-I SBP ZnuA has been characterized and the structure of the zinc-bound (holo) form has been determined by X-ray crystallography. Remarkably, despite 95% sequence identity to the ZnuA homologue from Salmonella enterica, C. koseri ZnuA exhibits a different zinc-coordination environment and a closed rather than an open conformation. Comparison with structures of another close ZnuA homologue from Escherichia coli suggests a surprisingly flexible conformational landscape that may be important for efficient zinc binding and/or delivery to the membrane permease.
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13
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Aureliano M, Gumerova NI, Sciortino G, Garribba E, McLauchlan CC, Rompel A, Crans DC. Polyoxidovanadates' interactions with proteins: An overview. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214344] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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14
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Cameron JM, Guillemot G, Galambos T, Amin SS, Hampson E, Mall Haidaraly K, Newton GN, Izzet G. Supramolecular assemblies of organo-functionalised hybrid polyoxometalates: from functional building blocks to hierarchical nanomaterials. Chem Soc Rev 2021; 51:293-328. [PMID: 34889926 DOI: 10.1039/d1cs00832c] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This review provides a comprehensive overview of recent advances in the supramolecular organisation and hierarchical self-assembly of organo-functionalised hybrid polyoxometalates (hereafter referred to as hybrid POMs), and their emerging role as multi-functional building blocks in the construction of new nanomaterials. Polyoxometalates have long been studied as a fascinating outgrowth of traditional metal-oxide chemistry, where the unusual position they occupy between individual metal oxoanions and solid-state bulk oxides imbues them with a range of attractive properties (e.g. solubility, high structural modularity and tuneable properties/reactivity). Specifically, the capacity for POMs to be covalently coupled to an effectively limitless range of organic moieties has opened exciting new avenues in their rational design, while the combination of distinct organic and inorganic components facilitates the formation of complex molecular architectures and the emergence of new, unique functionalities. Here, we present a detailed discussion of the design opportunities afforded by hybrid POMs, where fine control over their size, topology and their covalent and non-covalent interactions with a range of other species and/or substrates makes them ideal building blocks in the assembly of a broad range of supramolecular hybrid nanomaterials. We review both direct self-assembly approaches (encompassing both solution and solid-state approaches) and the non-covalent interactions of hybrid POMs with a range of suitable substrates (including cavitands, carbon nanotubes and biological systems), while giving key consideration to the underlying driving forces in each case. Ultimately, this review aims to demonstrate the enormous potential that the rational assembly of hybrid POM clusters shows for the development of next-generation nanomaterials with applications in areas as diverse as catalysis, energy-storage and molecular biology, while providing our perspective on where the next major developments in the field may emerge.
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Affiliation(s)
- Jamie M Cameron
- Nottingham Applied Materials and Interfaces (NAMI) Group, The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, UK.
| | - Geoffroy Guillemot
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France.
| | - Theodor Galambos
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France.
| | - Sharad S Amin
- Nottingham Applied Materials and Interfaces (NAMI) Group, The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, UK.
| | - Elizabeth Hampson
- Nottingham Applied Materials and Interfaces (NAMI) Group, The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, UK.
| | - Kevin Mall Haidaraly
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France.
| | - Graham N Newton
- Nottingham Applied Materials and Interfaces (NAMI) Group, The GSK Carbon Neutral Laboratories for Sustainable Chemistry, University of Nottingham, UK.
| | - Guillaume Izzet
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, IPCM, 4 Place Jussieu, F-75005 Paris, France.
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15
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Roux A, Talon R, Alsalman Z, Engilberge S, D'Aléo A, Di Pietro S, Robin A, Bartocci A, Pilet G, Dumont E, Wagner T, Shima S, Riobé F, Girard E, Maury O. Influence of Divalent Cations in the Protein Crystallization Process Assisted by Lanthanide-Based Additives. Inorg Chem 2021; 60:15208-15214. [PMID: 34597021 DOI: 10.1021/acs.inorgchem.1c01635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of lanthanide complexes as powerful auxiliaries for biocrystallography prompted us to systematically analyze the influence of the commercial crystallization kit composition on the efficiency of two lanthanide additives: [Eu(DPA)3]3- and Tb-Xo4. This study reveals that the tris(dipicolinate) complex presents a lower chemical stability and a strong tendency toward false positives, which are detrimental for its use in a high-throughput robotized crystallization platform. In particular, the crystal structures of (Mg(H2O)6)3[Eu(DPA)3]2·7H2O (1), {(Ca(H2O)4)3[Eu(DPA)3]2}n·10nH2O (2), and {Cu(DPA)(H2O)2}n (3), resulting from spontaneous crystallization in the presence of a divalent alkaline-earth cation and transmetalation, are reported. On the other hand, Tb-Xo4 is perfectly soluble in the crystallization media, stable in the presence of alkaline-earth dications, and slowly decomposes (within days) by transmetalation with transition metals. The original structure of [Tb4L4(H2O)4]Cl4·15H2O (4) is also described, where L represents a bis(pinacolato)triazacyclononane ligand. This paper also highlights a potential synergy of interactions between Tb-Xo4 and components of the crystallization mixtures, leading to the formation of complex adducts like {AdkA/Tb-Xo4/Mg2+/glycerol} in the protein binding sites. The observation of such multicomponent adducts illustrated the complexity and versatility of the supramolecular chemistry occurring at the surface of the proteins.
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Affiliation(s)
- Amandine Roux
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France.,Polyvalan, Lyon F-69342, France
| | - Romain Talon
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Zaynab Alsalman
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | | | - Anthony D'Aléo
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Sebastiano Di Pietro
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Adeline Robin
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Alessio Bartocci
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Guillaume Pilet
- CNRS UMR 5615, Université Lyon, Université Claude Bernard Lyon 1, 43 boulevard du 11 novembre 1918, Villeurbanne Cedex F-69622, France
| | - Elise Dumont
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France.,Institut Universitaire de France, 1 rue Descartes, Paris 75005, France
| | - Tristan Wagner
- Microbial Protein Structure Group, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse 10, Marburg D-35043, Germany.,Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, 1-Celsiusstrasse, Bremen 35043, Germany
| | - Seigo Shima
- Microbial Protein Structure Group, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse 10, Marburg D-35043, Germany
| | - François Riobé
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Eric Girard
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Olivier Maury
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
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16
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Breibeck J, Tanuhadi E, Gumerova NI, Giester G, Prado-Roller A, Rompel A. Speciation of Transition-Metal-Substituted Keggin-Type Silicotungstates Affected by the Co-crystallization Conditions with Proteinase K. Inorg Chem 2021; 60:15096-15100. [PMID: 34529407 PMCID: PMC8527451 DOI: 10.1021/acs.inorgchem.1c02005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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We report on the
synthesis of the tetrasubstituted sandwich-type
Keggin silicotungstates as the pure Na salts Na14[(A-α-SiW10O37)2{Co4(OH)2(H2O)2}]·37H2O (Na{SiW10Co2}2) and Na14[(A-α-SiW10O37)2{Ni4(OH)2(H2O)2}]·77.5H2O (Na{SiW10Ni2}2), which were prepared by
applying a new synthesis protocol and characterized thoroughly in
the solid state by single-crystal and powder X-ray diffraction, IR
spectroscopy, thermogravimetric analysis, and elemental analysis.
Proteinase K was applied as a model protein and the polyoxotungstate
(POT)–protein interactions of Na{SiW10Co2}2 and Na{SiW10Ni2}2 were studied side by side with the literature-known
K5Na3[A-α-SiW9O34(OH)3{Co4(OAc)3}]·28.5H2O ({SiW9Co4}) featuring the same number
of transition metals. Testing the solution behavior of applied POTs
under the crystallization conditions (sodium acetate buffer, pH 5.5)
by time-dependent UV/vis spectroscopy and electrospray ionization
mass spectrometry speciation studies revealed an initial dissociation
of the sandwich POTs to the disubstituted Keggin anions HxNa5–x[SiW10Co2O38]3– and HxNa5–x[SiW10Ni2O38]3– ({SiW10M2}, M = CoII and NiII) followed
by partial rearrangement to the monosubstituted compounds (α-{SiW11Co} and α-{SiW11Ni}) after 1 week of aging.
The protein crystal structure analysis revealed monosubstituted α-Keggin
POTs in two conserved binding positions for all three investigated
compounds, with one of these positions featuring a covalent attachment
of the POT anion to an aspartate carboxylate. Despite the presence
of both mono- and disubstituted anions in a crystallization mixture,
proteinase K selectively binds to monosubstituted anions because of
their preferred charge density for POT–protein interaction. We report on the development of a new synthesis
protocol
to prepare the Na salts of the tetrasubstituted sandwich-type Keggin
derivatives Na14[(A-α-SiW10O38)2{Co4(OH)2(H2O)2}]·37H2O (Na{SiW10Co2}2) and Na14[(A-α-SiW10O38)2{Ni4(OH)2(H2O)2}]·77.5H2O (Na{SiW10Ni2}2). Following a thorough characterization
of the polyoxotungstate (POT) dimers involving single-crystal and
powder X-ray diffraction, IR spectroscopy, thermogravimetric analysis,
and elemental analysis in the solid state and UV/vis spectroscopy
and electrospray ionization mass spectrometry in solution, the water-soluble
compounds (>5 mM) were applied as additives for the crystallization
of proteinase K along with the tetrasubstituted monomeric Keggin-type
analogue K5Na3[A-α-SiW9O34(OH)3{Co4(OAc)3}]·28.5H2O ({SiW9Co4}). Crystallographic studies
on the obtained protein crystals revealed monosubstituted Keggin derivatives
in all three cases bound to conserved sites of the protein, which
highlights a selectivity of proteinase K toward monosubstituted Keggin
POTs within a narrow range of surface charge density.
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Affiliation(s)
- Joscha Breibeck
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
| | - Elias Tanuhadi
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
| | - Nadiia I Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
| | - Gerald Giester
- Universität Wien, Fakultät für Geowissenschaften, Geographie und Astronomie, Institut für Mineralogie und Kristallographie, Althanstraße 14, 1090 Wien, Austria
| | - Alexander Prado-Roller
- Universität Wien, Fakultät für Chemie, Institut für Anorganische Chemie und Zentrum für Röntgenstrukturanalyse, Währinger Straße 42, 1090 Wien, Austria
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
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17
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Lampl R, Breibeck J, Gumerova NI, Galanski MS, Rompel A. Wells-Dawson phosphotungstates as mushroom tyrosinase inhibitors: a speciation study. Sci Rep 2021; 11:19354. [PMID: 34588468 PMCID: PMC8481536 DOI: 10.1038/s41598-021-96491-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Accepted: 08/06/2021] [Indexed: 01/28/2023] Open
Abstract
In order to elucidate the active polyoxotungstate (POT) species that inhibit fungal polyphenol oxidase (AbPPO4) in sodium citrate buffer at pH 6.8, four Wells-Dawson phosphotungstates [α/β-PV2WVI18O62]6- (intact form), [α2-PV2WVI17O61]10- (monolacunary), [PV2WVI15O56]12- (trilacunary) and [H2PV2WVI12O48]12- (hexalacunary) were investigated. The speciation of the POT solutions under the dopachrome assay (50 mM Na-citrate buffer, pH 6.8; L-3,4-dihydroxyphenylalanine as a substrate) conditions were determined by 183W-NMR, 31P-NMR spectroscopy and mass spectrometry. The intact Wells-Dawson POT [α/β-PV2WVI18O62]6- shows partial (~ 69%) disintegration into the monolacunary [α2-PV2WVI17O61]10- anion with moderate activity (Ki = 9.7 mM). The monolacunary [α2-PV2WVI17O61]10- retains its structural integrity and exhibits the strongest inhibition of AbPPO4 (Ki = 6.5 mM). The trilacunary POT [PV2WVI15O56]12- rearranges to the more stable monolacunary [α2-PV2WVI17O61]10- (~ 62%) accompanied by release of free phosphates and shows the weakest inhibition (Ki = 13.6 mM). The hexalacunary anion [H2PV2WVI12O48]12- undergoes time-dependent hydrolysis resulting in a mixture of [H2PV2WVI12O48]12-, [PV8WVI48O184]40-, [PV2WVI19O69(H2O)]14- and [α2-PV2WVI17O61]10- which together leads to comparable inhibitory activity (Ki = 7.5 mM) after 48 h. For the solutions of [α/β-PV2WVI18O62]6-, [α2-PV2WVI17O61]10- and [PV2WVI15O56]12- the inhibitory activity is correlated to the degree of their rearrangement to [α2-PV2WVI17O61]10-. The rearrangement of hexalacunary [H2PV2WVI12O48]12- into at least four POTs with a negligible amount of monolacunary anion interferes with the correlation of activity to the degree of their rearrangement to [α2-PV2WVI17O61]10-. The good inhibitory effect of the Wells-Dawson [α2-PV2WVI17O61]10- anion is explained by the low charge density of its protonated forms Hx[α2-PV2WVI17O61](10-x)- (x = 3 or 4) at pH 6.8.
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Affiliation(s)
- Raphael Lampl
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090, Wien, Austria
| | - Joscha Breibeck
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090, Wien, Austria
| | - Nadiia I Gumerova
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090, Wien, Austria
| | - Mathea Sophia Galanski
- Fakultät für Chemie, Institut für Anorganische Chemie und NMR Zentrum, Universität Wien, Währinger Str. 42, 1090, Wien, Austria
| | - Annette Rompel
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090, Wien, Austria.
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18
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Lunk H, Hartl H. The fascinating polyoxometalates. ChemTexts 2021; 7. [DOI: 10.1007/s40828-021-00145-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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20
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Abstract
Understanding the stability and speciation of metal-oxo clusters in solution is essential for many of their applications in different areas. In particular, hybrid organic-inorganic polyoxometalates (HPOMs) have been attracting increasing attention as they combine the complementary properties of organic ligands and metal-oxygen nanoclusters. Nevertheless, the speciation and solution behavior of HPOMs have been scarcely investigated. Hence, in this work, a series of HPOMs based on the archetypical Anderson-Evans structure, δ-[MnMo6O18{(OCH2)3C-R}2]3-, with different functional groups (R = -NH2, -CH3, -NHCOCH2Cl, -N═CH(2-C5H4N) {pyridine; -Pyr}, and -NHCOC9H15N2OS {biotin; -Biot}) and countercations (tetrabutylammonium {TBA}, Li, Na, and K) were synthesized, and their solution behavior was studied in detail. In aqueous solutions, decomposition of HPOMs into the free organic ligand, [MoO4]2-, and free Mn3+ was observed over time and was shown to be highly dependent on the pH, temperature, and nature of the ligand functional group but largely independent of ionic strength or the nature of the countercation. Furthermore, hydrolysis of the amide and imine bonds often present in postfunctionalized HPOMs was also observed. Hence, HPOMs were shown to exhibit highly dynamic behavior in solution, which needs to be carefully considered when designing HPOMs, particularly for biological applications.
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Affiliation(s)
| | - Sarah Lentink
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Mhamad A Moussawi
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
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21
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Tsegaye S, Dedefo G, Mehdi M. Biophysical applications in structural and molecular biology. Biol Chem 2021; 402:1155-1177. [PMID: 34218543 DOI: 10.1515/hsz-2021-0232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 05/27/2021] [Indexed: 11/15/2022]
Abstract
The main objective of structural biology is to model proteins and other biological macromolecules and link the structural information to function and dynamics. The biological functions of protein molecules and nucleic acids are inherently dependent on their conformational dynamics. Imaging of individual molecules and their dynamic characteristics is an ample source of knowledge that brings new insights about mechanisms of action. The atomic-resolution structural information on most of the biomolecules has been solved by biophysical techniques; either by X-ray diffraction in single crystals or by nuclear magnetic resonance (NMR) spectroscopy in solution. Cryo-electron microscopy (cryo-EM) is emerging as a new tool for analysis of a larger macromolecule that couldn't be solved by X-ray crystallography or NMR. Now a day's low-resolution Cryo-EM is used in combination with either X-ray crystallography or NMR. The present review intends to provide updated information on applications like X-ray crystallography, cryo-EM and NMR which can be used independently and/or together in solving structures of biological macromolecules for our full comprehension of their biological mechanisms.
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Affiliation(s)
- Solomon Tsegaye
- Department of Biochemistry, College of Health Sciences, Arsi University, Oromia, Ethiopia
| | - Gobena Dedefo
- Department of Medical Laboratory Technology, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Mohammed Mehdi
- Department of Biochemistry, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
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22
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Sifaki K, Gumerova NI, Giester G, Rompel A. Synthesis and characterization of the Anderson-Evans tungstoantimonate [Na 5(H 2O) 18{(HOCH 2) 2CHNH 3} 2][SbW 6O 24]. Acta Crystallogr C Struct Chem 2021; 77:420-425. [PMID: 34216448 PMCID: PMC8254527 DOI: 10.1107/s2053229621006239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Accepted: 06/16/2021] [Indexed: 11/11/2022] Open
Abstract
A novel tungstoantimonate, [Na5(H2O)18{(HOCH2)2CHNH3}2][SbVWVI6O24] (SbW6), was synthesized from an aqueous solution and structurally characterized by single-crystal X-ray diffraction, which revealed C2/c symmetry. The structure contains two serinol [(HOCH2)2CHNH3]+ and five Na+ cations, which are octahedrally surrounded by 18 water molecules, and one [SbVWVI6O24]7- anion. The serinol molecules also play a critical role in the synthesis by acting as a mild buffering agent. Each of the WVI and SbV ions is six-coordinated and displays a distorted octahedral motif. A three-dimensional supramolecular framework is formed via hydrogen-bonding interactions between the tungstoantimonates and cations. Powder X-ray diffraction, elemental analysis, thermogravimetric analysis and IR spectroscopy were performed on SbW6 to prove the purity, to identify the water content and to characterize the vibrational modes of the crystallized phase.
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Affiliation(s)
- Kleanthi Sifaki
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
| | - Nadiia I. Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, 1090 Wien, Austria
| | - Gerald Giester
- Universität Wien, Fakultät für Geowissenschaften, Geographie und Astronomie, Institut für Mineralogie und Kristallographie, 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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23
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Tanuhadi E, Gumerova NI, Prado-Roller A, Mautner A, Rompel A. Defect {(W VIO 7)W VI4} and Full {(W VIO 7)W VI5} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates. Inorg Chem 2021; 60:8917-8923. [PMID: 34085528 PMCID: PMC8220499 DOI: 10.1021/acs.inorgchem.1c00810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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We report on the
synthesis and characterization of three new nanosized
main group V heteropolyoxotungstates KxNay[H2(XWVI9O33)(WVI5O12)(X2WVI29O103)]·nH2O {X3W43} (x = 11, y = 16, and n = 115.5 for X = SbIII; x = 20, y = 7, and n = 68 for X = BiIII) and K8Na15[H16(CoII(H2O)2)0.9(CoII(H2O)3)2(WVI3.1O14)(SbIIIWVI9O33)(SbIII2WVI30O106)(H2O)]·53H2O {Co3Sb3W42}. On the basis of the key parameters for the one-pot
synthesis strategy of {Bi3W43}, a rational step-by-step
approach was developed using the known Krebs-type polyoxotungstate
(POT) K12[SbV2WVI22O74(OH)2]·27H2O {Sb2W22} as a nonlacunary precursor leading to the synthesis
and characterization of {Sb3W43} and {Co3Sb3W42}. Solid-state
characterization of the three new representatives {Bi3W43}, {Sb3W43}, and {Co3Sb3W42} by single-crystal
and powder X-ray diffraction (XRD), IR spectroscopy, thermogravimetric
analysis (TGA), energy-dispersive X-ray analysis (EDX), X-ray photoelectron
spectroscopy (XPS), and elemental analysis, along with characterization
in solution by UV/vis spectroscopy shows that {Bi3W43}, {Sb3W43}, and {Co3Sb3W42} represent the first
main group V heteropolyoxotungstates encapsulating a defect {(WVIO7)WVI4} ({X3W43}, X = BiIII and SbIII) or full
{(WVIO7)WVI5} ({Co3Sb3W42}) pentagonal
unit. With 43 tungsten metal centers, {X3W43} (X =
BiIII and SbIII) are the largest unsubstituted
tungstoantimonate– and bismuthate clusters reported to date.
By using time-dependent UV/vis spectroscopy, the isostructural representatives {Sb3W43} and {Bi3W43} were subjected
to a comprehensive study on their catalytic properties as homogeneous
electron-transfer catalysts for the reduction of K3[FeIII(CN)6] as a model substrate revealing up to 5.8
times higher substrate conversions in the first 240 min (35% for {Sb3W43}, 29% for {Bi3W43}) as
compared to the uncatalyzed reaction (<6% without catalyst after
240 min) under otherwise identical conditions. We report on the synthesis and characterization of three
new tungsten-based defect {(WVIO7)WVI4}KxNay[H2(XWVI9O33)(WVI5O12)(X2WVI29O103)]·nH2O {X3W43} (x = 11, y = 16, and n = 115.5 for X = SbIII; x = 20, y = 7, and n = 68 for BiIII)
or full pentagonal {(WVIO7)WVI5} unit K8Na15[H16(CoII(H2O)2)0.9(CoII(H2O)3)2(WVI3.1O14)(SbIIIWVI9O33)(SbIII2WVI30O106)(H2O)]·53H2O {Co3Sb3W42} encapsulating main group V representatives.
With 43 W centers, {Sb3W43} and {Bi3W43} exhibit the highest nuclearity among unsubstituted
tungstoantimonates and bismuthates reported to date. The catalytic
properties of {Sb3W43} and {Bi3W43} as homogeneous electron-transfer catalysts for the reduction
of K3[FeIII(CN)6] to K4[FeII(CN)6] was investigated.
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Affiliation(s)
- Elias Tanuhadi
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, 1090 Wien, Austria
| | - Nadiia I Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, 1090 Wien, Austria
| | - Alexander Prado-Roller
- Universität Wien, Fakultät für Chemie, Zentrum für Röntgenstrukturanalyse und Institut für Anorganische Chemie, 1090 Wien, Austria
| | - Andreas Mautner
- Universität Wien, Fakultät für Chemie, Polymer and Composite Engineering (PaCE) Group, Institute of Materials Chemistry and Research, 1090 Vienna, Austria
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, 1090 Wien, Austria
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Abstract
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This Viewpoint brings
awareness of the challenges and subsequent
breakthroughs at the intersection of different disciplines, illustrated
by the example of the influence biological entities exerted on a huge
class of inorganic coordination compounds, called polyoxometalates
(POMs). We highlight the possible effects of biological systems on
POMs that need to be considered, thereby emphasizing the depth and
complexity of interdisciplinary work. We map POMs’ structural,
electrochemical, and stability properties in the presence of biomolecules
and stress the potential challenges related to inorganic coordination
chemistry carried out in biological systems. This Viewpoint shows
that new chemistry is available at the intersections between disciplines
and aims to guide the community toward a discussion about current
as well as future trends in truly interdisciplinary work. We discuss the investigation of polyoxometalates in biological
systems as one future direction of chemistry. Highly interesting,
new, and sometimes spectacular findings and applications can be obtained
from correctly carried out interdisciplinary research. In this Viewpoint,
the challenges of truly interdisciplinary work and concepts for overcoming
boundaries while working on intertwining disciplines are discussed.
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Affiliation(s)
- Nadiia I Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, Wien 1090, Austria
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstraße 14, Wien 1090, Austria
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25
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Tanuhadi E, Gumerova NI, Prado-Roller A, Galanski M, Čipčić-Paljetak H, Verbanac D, Rompel A. Aluminum-Substituted Keggin Germanotungstate [HAl(H 2O)GeW 11O 39] 4-: Synthesis, Characterization, and Antibacterial Activity. Inorg Chem 2021; 60:28-31. [PMID: 33332970 PMCID: PMC7788568 DOI: 10.1021/acs.inorgchem.0c03311] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
We report on the new monosubstituted
aluminum Keggin-type germanotungstate
(C4H12N)4[HAlGeW11O39(H2O)]·11H2O ([Al(H2O)GeW11]4–), which has been
synthesized at room temperature via rearrangement of the dilacunary
[γ-GeW10O36]8– polyoxometalate
precursor. [Al(H2O)GeW11]4– has been characterized thoroughly both in the solid state
by single-crystal and powder X-ray diffraction, IR spectroscopy, thermogravimetric
analysis, and elemental analysis as well as in solution by cyclic
voltammetry (CV) 183W, 27Al NMR and UV–vis
spectroscopy. A study on the antibacterial properties of [Al(H2O)GeW11]4– and the known aluminum(III)-centered
Keggin polyoxotungstates (Al-POTs) α-Na5[AlW12O40] (α-[AlW12O40]5–) and Na6[Al(AlOH2)W11O39] ([Al(AlOH2)W11O39]6–) revealed enhanced activity for all three Al-POTs against the Gram-negative
bacterium Moraxella catarrhalis (minimum inhibitory
concentration (MIC) up to 4 μg mL–1) and the
Gram-positive Enterococcus faecalis (MIC up to 128
μg mL–1) compared to the inactive Al(NO3)3 salt (MIC > 256 μg mL–1). CV indicates the redox activity of the Al-POTs as a dominating
factor for the observed antibacterial activity with increased tendency
to reduction, resulting in increased antibacterial activity of the
POT. We report on the synthesis and thorough
characterization
of the new monosubstituted aluminum germanotungstate (C4H12N)4[HAlGeW11O39(H2O)]·11H2O ([Al(H2O)GeW11]4−), which has been subjected to an antibacterial
study including the previously reported α-Na5[AlW12O40] and Na6[Al(AlOH2)W11O39]. All three aluminum-substituted polyoxotungstates
(Al-POTs) revealed enhanced activity against Moraxella catarrhalis and Enterococcus faecalis compared to the inactive
Al(NO3)3 salt. On the basis of cyclic voltammetry
studies, the redox activity of the POTs is suggested to have an impact
on their overall antibacterial activity.
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Affiliation(s)
- Elias Tanuhadi
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstrasse 14, 1090 Wien, Austria
| | - Nadiia I Gumerova
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstrasse 14, 1090 Wien, Austria
| | - Alexander Prado-Roller
- Universität Wien, Fakultät für Chemie, Institut für Anorganische Chemie und Zentrum für Röntgenstrukturanalyse, Währinger Strasse 42, 1090 Wien, Austria
| | - Markus Galanski
- Universität Wien, Fakultät für Chemie, Institut für Anorganische Chemie und NMR Zentrum, Währinger Strasse 42, 1090, Wien, Austria
| | - Hana Čipčić-Paljetak
- Center for Translational and Clinical Research, Croatian Center of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Donatella Verbanac
- Faculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia
| | - Annette Rompel
- Universität Wien, Fakultät für Chemie, Institut für Biophysikalische Chemie, Althanstrasse 14, 1090 Wien, Austria
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26
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Tanuhadi E, Al-Sayed E, Roller A, Čipčić-Paljetak H, Verbanac D, Rompel A. Synthesis, Characterization, and Phosphoesterase Activity of a Series of 4f- and 4d-Sandwich-Type Germanotungstates [( n-C 4H 9) 4N] l/mH 2[(M(H 2O) 3)(γ-GeW 10O 35) 2] (M = Ce III, Nd III, Gd III, Er III, l = 7; Zr IV, m = 6). Inorg Chem 2020; 59:14078-14084. [PMID: 32945651 PMCID: PMC7539296 DOI: 10.1021/acs.inorgchem.0c01852] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
![]()
We report on a family of five new
4f- and 4d-doped sandwich-type
germanotungstates with the general formula [(n-C4H9)4N]l/mH2[(M(H2O)3)(γ-GeW10O35)2]·3(CH3)2CO [M(H2O)3(GeW10)2] (M = CeIII, NdIII, GdIII, ErIII, l = 7; ZrIV, m = 6), which have been synthesized
at room temperature in an acetone–water mixture. Among the
compound series, [Zr(H2O)3(GeW10)2]8–, which has been obtained in the
presence of 30% H2O2, represents the first example
of a 4d-substituted germanotungstate incorporating the intact dilacunary
[γ-GeIVW10O36]8– building block. All compounds were characterized thoroughly in the
solid state by single-crystal and powder X-ray diffraction (XRD),
IR spectroscopy, thermogravimetric analysis (TGA), and elemental analysis
and in solution by NMR and UV–vis spectroscopy. The phosphoesterase
activity of [Ce(H2O)3(GeW10)2]9– and [Zr(H2O)3(GeW10)2]8– toward the model substrates 4-nitrophenyl phosphate (NPP)
and O,O-dimethyl O-(4-nitrophenyl) phosphate (DMNP) was monitored with 1H- and 31P-NMR spectroscopy revealing an acceleration
of the hydrolytic reaction by an order of magnitude (kcorr = 3.44 (±0.30) × 10–4 min–1 for [Ce(H2O)3(GeW10)2]9– and kcorr = 5.36 (±0.05) × 10–4 min–1 for [Zr(H2O)3(GeW10)2]8–) as compared to the uncatalyzed reaction (kuncat = 2.60 (±0.10) × 10–5 min–1). [Ce(H2O)3(GeW10)2]9– demonstrated improved antibacterial
activity toward Moraxella catarrhalis (MIC 32 μg/mL),
compared to the unsubstituted [GeW10O36]8– POM (MIC 64 μg/mL). We report on the synthesis and characterization of five
new monosubstituted 4f- and 4d-germanotungstates [(n-C4H9)4N]l/mH2[(M(H2O)3)(γ-GeW10O35)2]·3(CH3)2CO [M(H2O)3(GeW10)2] (M = CeIII, NdIII, GdIII, ErIII, l = 7; ZrIV; m = 6). The phosphoesterase properties of [Ce(H2O)3(GeW10)2]9− and [Zr(H2O)3(GeW10)2]8− were
investigated by probing the hydrolytic activity toward 4-nitrophenyl
phosphate (NPP) and O,O-dimethyl O-(4-nitrophenyl) phosphate (DMNP). Antibacterial tests
revealed inhibiting activity of [Ce(H2O)3(GeW10)2]9− against Moraxella
catarrhalis.
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Affiliation(s)
- Elias Tanuhadi
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
| | - Emir Al-Sayed
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
| | - Alexander Roller
- Fakultät für Chemie, Zentrum für Röntgenstrukturanalyse, Universität Wien, 1090 Wien, Austria
| | - Hana Čipčić-Paljetak
- Center for Translational and Clinical Research, Croatian Center of Excellence for Reproductive and Regenerative Medicine, School of Medicine, University of Zagreb, 10000 Zagreb, Croatia
| | - Donatella Verbanac
- Faculty of Pharmacy and Biochemistry, University of Zagreb, 10000 Zagreb, Croatia
| | - Annette Rompel
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
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27
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Abdelhameed SAM, Vandebroek L, de Azambuja F, Parac-Vogt TN. Redox Activity of Ce(IV)-Substituted Polyoxometalates toward Amino Acids and Peptides. Inorg Chem 2020; 59:10569-10577. [DOI: 10.1021/acs.inorgchem.0c00993] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - Laurens Vandebroek
- KU Leuven, Department of Chemistry, Celestijnenlaan 200F, 3001 Leuven, Belgium
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28
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Tanuhadi E, Al-Sayed E, Novitchi G, Roller A, Giester G, Rompel A. Cation-Directed Synthetic Strategy Using 4f Tungstoantimonates as Nonlacunary Precursors for the Generation of 3d-4f Clusters. Inorg Chem 2020; 59:8461-8467. [PMID: 32442371 PMCID: PMC7298720 DOI: 10.1021/acs.inorgchem.0c00890] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
![]()
The first synthetic
pathway using a series of four nonlacunary
4f-heterometal-substituted polyoxotungstate clusters Na21[(Ln(H2O)(OH)2(CH3COO))3(WO4)(SbW9O33)3]·nH2O (NaLnSbW9; Ln = TbIII, DyIII, HoIII, ErIII, YIII) as precursors for the directed
preparation of nine new 3d–4f heterometallic tungstoantimonates
K5Na12H3[TM(H2O)Ln3(H2O)5(W3O11)(SbW9O33)3]·nH2O (KTMLnSbW9; TM = CoII, NiII; Ln = TbIII, DyIII, HoIII, ErIII, YIII) has been developed.
Systematic studies revealed an increased K content in the aqueous
acidic reaction mixture to be the key step in the cation-directed
preparation of 3d–4f compounds; among those, the Co-containing
members represent the first examples of KCoLnSbW9 (Ln = TbIII, DyIII, HoIII, ErIII, YIII) heterometallic tungstoantimonates
exhibiting the SbW9 building
block. All 13 compounds have been characterized thoroughly in the
solid state by powder and single-crystal X-ray diffraction (XRD),
revealing a cyclic trimeric polyoxometalate architecture with three SbW9 units encapsulating a planar
triangle of LnIII ions in the case of NaLnSbW9 and a heterometallic core of one TMII and three LnIII for KTMLnSbW9 (TM = CoII, NiII; Ln =
TbIII, DyIII, HoIII, ErIII, YIII). The results obtained by XRD are supplemented
by complementary characterization methods in the solid state such
as IR spectroscopy, thermogravimetric analysis, and elemental analysis
as well as in solution by UV–vis spectroscopy. Detailed magnetic
studies on the representative compounds KTMDySbW9 (TM = CoII, NiII) and KCoYSbW9 of the series revealed field-induced
slow magnetic relaxation. The first step-by-step
synthetic protocol using preformed
4f tungstoantimonate clusters as nonlacunary precursors for the controlled
preparation and thorough characterization of a family of nine new
3d−4f heterometallic polyoxometalates [TM(H2O)Ln3(H2O)5(W3O11)(SbW9O33)3]20- (KTMLnSbW9) (TM = CoII, NiII; Ln = TbIII, DyIII, HoIII, ErIII, YIII) is reported. Magnetic studies on the
DyIII-containing representatives [TM(H2O)Dy3(H2O)5(W3O11)(SbW9O33)3]20− (TM = CoII, NiII) show single-molecule-magnet behavior.
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Affiliation(s)
- Elias Tanuhadi
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
| | - Emir Al-Sayed
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
| | - Ghenadie Novitchi
- Laboratoire National des Champs Magnetiques IntensesCNRS, 25 rue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Alexander Roller
- Fakultät für Chemie, Zentrum für Röntgenstrukturanalyse, Universität Wien, 1090 Wien, Austria
| | - Gerald Giester
- , Fakultät für Geowissenschaften, Geographie und Astronomie, Institut für Mineralogie und KristallographieUniversität Wien, 1090 Wien, Austria
| | - Annette Rompel
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, 1090 Wien, Austria
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29
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Abstract
![]()
The Anderson-type
hexamolybdoaluminate functionalized with lauric
acid (LA), (TBA)3[Al(OH)3Mo6O18{(OCH2)3CNHCOC11H23}]·9H2O (TBA-AlMo6-LA, where TBA = tetrabutylammonium), was prepared via two
synthetic routes and characterized by thermogravimetric and elemental
analyses, mass spectrometry, IR and 1H NMR spectroscopy,
and powder and single-crystal X-ray diffraction. The interaction of
TBA-AlMo6-LA with human serum albumin (HSA) was investigated
via fluorescence and circular dichroism spectroscopy. The results
revealed that TBA-AlMo6-LA binds strongly to HSA (63% quenching
at an HSA/TBA-AlMo6-LA ratio of 1:1), exhibiting static
quenching. In contrast to TBA-AlMo6-LA, the nonfunctionalized
polyoxometalate, Na3(H2O)6[Al(OH)6Mo6O18]·2H2O (AlMo6), showed weak binding toward HSA (22% quenching at a HSA/AlMo6 ratio of 1:25). HSA binding was confirmed by X-ray structure
analysis of the HSA-Myr-AlMo6-LA complex (Myr = myristate).
These results provide a promising lead for the design of novel polyoxometalate-based
hybrids that are able to exploit HSA as a delivery vehicle to improve
their pharmacokinetics and bioactivity. A
fatty acid-functionalized Anderson-type polyoxometalate,
(TBA)3[Al(OH)3Mo6O18{(OCH2)3CNHCOC11H23}]·9H2O (TBA-AlMo6-LA), was synthesized and characterized
in detail. The final organic−inorganic hybrid shows an increased
affinity toward the transport protein human serum albumin (HSA) in
comparison to its unmodified counterpart, Na3(H2O)6[Al(OH)6Mo6O18)]·2H2O (AlMo6). This is of medical importance because
HSA is a well-known drug carrier and can therefore serve as a delivery
system for AlMo6. This study provides a rational design
for the synthesis of bioactive polyoxometalates with enhanced pharmacokinetic
properties.
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Affiliation(s)
- Aleksandar Bijelic
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090 Wien, Austria
| | - Anatolie Dobrov
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090 Wien, Austria
| | - Alexander Roller
- Fakultät für Chemie, Zentrum für Röntgenstrukturanalyse, Universität Wien, Währinger Straße 42, 1090 Wien, Austria
| | - Annette Rompel
- Fakultät für Chemie, Institut für Biophysikalische Chemie, Universität Wien, Althanstraße 14, 1090 Wien, Austria
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30
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Abstract
Polyoxometalates (POMs) are a kind of inorganic cluster metal complex with various biological activities, such as anti-Alzheimer's disease, antibacterial, anti-cancer, anti-diabetes, anti-virus and so on.
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Affiliation(s)
- Meijuan Zhao
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
| | - Xiangsong Chen
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
| | - Guoxiang Chi
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
| | - Die Shuai
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
| | - Li Wang
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
| | | | - Jian Li
- College of Food and Biological Engineering
- Jimei University
- Xiamen
- P.R. China
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31
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Abstract
The review covers stability and transformations of classical polyoxometalates in aqueous solutions and provides their ion-distribution diagrams over a wide pH range.
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Affiliation(s)
- Nadiia I. Gumerova
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- 1090 Vienna
- Austria
| | - Annette Rompel
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- 1090 Vienna
- Austria
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32
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Ivanov AA, Falaise C, Laouer K, Hache F, Changenet P, Mironov YV, Landy D, Molard Y, Cordier S, Shestopalov MA, Haouas M, Cadot E. Size-Exclusion Mechanism Driving Host–Guest Interactions between Octahedral Rhenium Clusters and Cyclodextrins. Inorg Chem 2019; 58:13184-13194. [DOI: 10.1021/acs.inorgchem.9b02048] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Anton A. Ivanov
- Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles, France
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
- The Federal Research Center of Fundamental and Translational Medicine, Novosibirsk 630117, Russia
| | - Clément Falaise
- Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Kevin Laouer
- Laboratoire d’Optique et Biosciences and Ecole Polytechnique, CNRS, INSERM, Institut polytechnique de Paris, Palaiseau 91128, France
| | - François Hache
- Laboratoire d’Optique et Biosciences and Ecole Polytechnique, CNRS, INSERM, Institut polytechnique de Paris, Palaiseau 91128, France
| | - Pascale Changenet
- Laboratoire d’Optique et Biosciences and Ecole Polytechnique, CNRS, INSERM, Institut polytechnique de Paris, Palaiseau 91128, France
| | - Yuri V. Mironov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - David Landy
- Unité de Chimie Environnementale et Interactions sur le Vivant, ULCO, Dunkerque EA 4492, France
| | - Yann Molard
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Rennes, France
| | - Stéphane Cordier
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS, Université de Rennes 1, Rennes, France
| | - Michael A. Shestopalov
- Nikolaev Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk 630090, Russia
- The Federal Research Center of Fundamental and Translational Medicine, Novosibirsk 630117, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Mohamed Haouas
- Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles, France
| | - Emmanuel Cadot
- Institut Lavoisier de Versailles, UMR 8180 CNRS, UVSQ, Université Paris-Saclay, Versailles, France
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33
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Krivosudský L, Roller A, Rompel A. Tuning the interactions of decavanadate with thaumatin, lysozyme, proteinase K and human serum proteins by its coordination to a pentaaquacobalt(ii) complex cation. NEW J CHEM 2019. [DOI: 10.1039/c9nj02495f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Inorganic functionalization of the decavanadate anion promotes a different type of interaction with model proteins thaumatin, lysozyme, proteinase K, human serum albumin and transferrin.
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Affiliation(s)
- Lukáš Krivosudský
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- Wien 1090
- Austria
| | - Alexander Roller
- Universität Wien
- Fakultät für Chemie
- Zentrum für Röntgenstrukturanalyse
- 1090 Wien
- Austria
| | - Annette Rompel
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- Wien 1090
- Austria
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34
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Breibeck J, Bijelic A, Rompel A. Transition metal-substituted Keggin polyoxotungstates enabling covalent attachment to proteinase K upon co-crystallization. Chem Commun (Camb) 2019; 55:11519-11522. [DOI: 10.1039/c9cc05818d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
POM-protein interaction: a series of 3d metal-substituted Keggin polyoxotungstates was co-crystallized with proteinase K, resulting in covalent bonds to aspartate protein side-chains as a desirable feature of these novel crystallization additives.
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Affiliation(s)
- Joscha Breibeck
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- 1090 Wien
- Austria
| | - Aleksandar Bijelic
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- 1090 Wien
- Austria
| | - Annette Rompel
- Universität Wien
- Fakultät für Chemie
- Institut für Biophysikalische Chemie
- 1090 Wien
- Austria
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