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Kapuścińska K, Dukała Z, Doha M, Ansari E, Wang J, Brudvig GW, Brooks B, Amin M. Bridging the Coordination Chemistry of Small Compounds and Metalloproteins Using Machine Learning. J Chem Inf Model 2024; 64:2586-2593. [PMID: 38054243 DOI: 10.1021/acs.jcim.3c01564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Metalloproteins require metal ions as cofactors to catalyze specific reactions with remarkable efficiency and specificity. In various electron transfer reactions, metals in the active sites change their oxidation states to facilitate the biochemical reactions. Cryogenic electron microscopy, X-ray, and X-ray free electron laser (XFEL) crystallography are used to image metalloproteins to understand the reaction mechanisms. However, radiation damage in cryoEM and X-ray crystallography, and the challenge of generating homogeneous crystals and keeping the appropriate experimental conditions for all the crystals in XFEL crystallography, may alter the oxidation states. Here, we build machine learning models trained on a large data set from the Cambridge Crystallographic Data Center to evaluate the metal oxidation states. The models yield high accuracy scores (from 82% to 94%) for all metals in the small molecules. Then, they were used to predict the oxidation states of more than 30 000 metal clusters in metalloproteins with Fe, Mn, Co, and Cu in their active sites. We found that most of the metals exist in the lower oxidation states (Fe2+ 77%, Mn2+ 85%, Co2+ 65%, and Cu+ 64%), and these populations correlate with the standard reduction potentials of the metal ions. Furthermore, we found no clear correlation between these populations and the resolution of the structures, which suggests no significant dependence of these predictions on the resolution. Our models represent a valuable tool for evaluating the oxidation states of the metals in metalloproteins imaged with different techniques. The data files and the machine learning code are available in a public GitHub repository: https://github.com/mamin03/OxitationStatesMetalloprotein.git.
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Affiliation(s)
- Katarzyna Kapuścińska
- Department of Sciences, University College Groningen, University of Groningen, 9718 BG Groningen, The Netherlands
| | - Zofia Dukała
- Department of Sciences, University College Groningen, University of Groningen, 9718 BG Groningen, The Netherlands
| | - Mekhola Doha
- Department of Sciences, University College Groningen, University of Groningen, 9718 BG Groningen, The Netherlands
| | - Eman Ansari
- Department of Sciences, University College Groningen, University of Groningen, 9718 BG Groningen, The Netherlands
| | - Jimin Wang
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Gary W Brudvig
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, Connecticut 06520, United States
- Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Bernand Brooks
- Laboratory of Computational Biology, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Muhamed Amin
- Department of Sciences, University College Groningen, University of Groningen, 9718 BG Groningen, The Netherlands
- Laboratory of Computational Biology, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
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Devi P, Singh K, Kumar B, Kumari Singh J. Synthesis, spectroscopic, antimicrobial and in vitro anticancer activity of Co+2, Ni+2, Cu+2 and Zn+2 metal complexes with novel Schiff base. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2023.110674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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Utsu PM, Gber TE, Nwosa DO, Nwagu AD, Benjamin I, Ikot IJ, Eno EA, Offiong OE, Adeyinka A, Louis H. Modeling of Anthranilhydrazide (HL1) Salicylhydrazone and Its Copper Complexes Cu(I) and Cu(II) as a Potential Antimicrobial and Antituberculosis Therapeutic Candidate. Polycycl Aromat Compd 2023. [DOI: 10.1080/10406638.2023.2186444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
Affiliation(s)
- Patrick M. Utsu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Terkumbur E. Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Deborah O. Nwosa
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Adanna D. Nwagu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Innocent Benjamin
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Immaculata J. Ikot
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Ededet A. Eno
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Offiong E. Offiong
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Adedabo Adeyinka
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, South Africa
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
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Cavalcante CDQO, da Mota THA, de Oliveira DM, Nascimento ÉCM, Martins JBL, Pittella-Silva F, Gatto CC. Dithiocarbazate ligands and their Ni(II) complexes with potential biological activity: Structural, antitumor and molecular docking study. Front Mol Biosci 2023; 10:1146820. [PMID: 36968279 PMCID: PMC10034969 DOI: 10.3389/fmolb.2023.1146820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Accepted: 02/14/2023] [Indexed: 03/09/2023] Open
Abstract
In the search for new metal complexes with antitumor potential, two dithiocarbazate ligands derived from 1,1,1-trifluoro-2,4-pentanedione (H2L1) and (H2L2) and four Ni(II) complexes, [Ni(L1)PPh3] (1), [Ni(L1)Py] (2), [Ni(L2)PPh3] (3), and [Ni(L2)Py] (4), were successfully synthesized and investigated by physical-chemistry and spectroscopic methods. The crystal structure of the H2L1 and the Ni(II) complexes has been elucidated by single-crystal X-ray diffraction. The obtained structure from H2L1 confirms the cyclization reaction and formation of the pyrazoline derivative. The results showed square planar geometry to the metal centers, in which dithiocarbazates coordinated by the ONS donor system and a triphenylphosphine or pyridine molecule complete the coordination sphere. Hirshfeld surface analysis by dnorm function was investigated and showed π–π stacking interactions upon the molecular packing of H2L1 and non-classical hydrogen bonds for all compounds. Fingerprint plots showed the main interactions attributed to H⋅H C⋅H, O⋅H, Br⋅H, and F⋅H, with contacts contributing between 1.9% and 38.2%. The mass spectrometry data indicated the presence of molecular ions [M + H]+ and characteristic fragmentations of the compounds, which indicated the same behavior of the compounds in solution and solid state. Molecular docking simulations were studied to evaluate the properties and interactions of the free dithiocarbazates and their Ni(II) complexes with selected proteins and DNA. These results were supported by in vitro cytotoxicity assays against four cancer cell lines, showing that the synthesized metal complexes display promising biological activity.
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Affiliation(s)
- Cássia de Q. O. Cavalcante
- University of Brasília, Institute of Chemistry, Laboratory of Inorganic Synthesis and Crystallography, Brasília, DF, Brazil
| | - Tales H. A. da Mota
- University of Brasília, Faculdade UnB Ceilândia, Multidisciplinary Laboratory of Human Health, Brasília, DF, Brazil
| | - Diêgo M. de Oliveira
- University of Brasília, Faculdade UnB Ceilândia, Multidisciplinary Laboratory of Human Health, Brasília, DF, Brazil
| | - Érica C. M. Nascimento
- University of Brasília, Institute of Chemistry, Laboratory of Computational Chemistry, Brasília, DF, Brazil
| | - João B. L. Martins
- University of Brasília, Institute of Chemistry, Laboratory of Computational Chemistry, Brasília, DF, Brazil
| | - Fabio Pittella-Silva
- University of Brasília, Faculty of Health Sciences and Medicine, Laboratory of Molecular Cancer Pathology, Brasília, DF, Brazil
| | - Claudia C. Gatto
- University of Brasília, Institute of Chemistry, Laboratory of Inorganic Synthesis and Crystallography, Brasília, DF, Brazil
- *Correspondence: Claudia C. Gatto,
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Comparison of bromazepam and ibuprofen influence on tooth pulp-evoked potentials in humans. SRP ARK CELOK LEK 2022. [DOI: 10.2298/sarh220131047v] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Introduction/Objective Somatosensory evoked potentials are a
neurophysiological tool for testing the effects of drugs in humans and
animals. The aim of this study was to estimate the way that bromazepam and
ibuprofen had on tooth pulp-evoked potentials (TPEPs) after non-painful
stimuli, as well as to detect possible differences in this activity.
Methods Sixty young healthy subjects were included in the study. They were
arranged into three groups: ibuprofen, bromazepam and placebo. To record
TPEPs response, dental pulp was electrically stimulated through intact
enamel with non-painful stimuli. For stimulation and registration, we used
Xltek Protektor 32 system, software EPWorks, version 5.0. The experiment
consisted of two testing sessions. Five recordings were performed in each
session. The first test session was before, and the second was 45 minutes
after administration of a single dose of the ibuprofen (400 mg), bromazepam
(1.5 mg) or placebo. Results The results of the present study exhibit that
both ibuprofen and bromazepam significantly increased all the latencies;
ibuprofen decreased amplitudes of all the waves except the first one (p <
0.05), and bromazepam decreased amplitudes of all the waves except the first
one (p < 0.05); placebo did not modified TPEPs waves (p > 0.05).
Additionally, there were no significant differences in influence on TPEPs
between bromazepam and ibuprofen (p > 0.05). Conclusion Our study showed
that both bromazepam and ibuprofen had the same influence on TPEPs after
non-painful stimuli. That indicates that anxiolytic dose of bromazepam
affects neurotransmission in the same manner as non-opioid analgesics
ibuprofen.
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