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Shaya J, Aloum L, Lu CS, Corridon PR, Aoudi A, Shunnar A, Alefishat E, Petroianu G. Theoretical Study of Hydroxylation of α- and β-Pinene by a Cytochrome P450 Monooxygenase Model. Int J Mol Sci 2023; 24:ijms24065150. [PMID: 36982225 PMCID: PMC10048887 DOI: 10.3390/ijms24065150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 02/09/2023] [Accepted: 02/13/2023] [Indexed: 03/30/2023] Open
Abstract
Previous studies on biocatalytic transformations of pinenes by cytochrome P450 (CYP) enzymes reveal the formation of different oxygenated products from a single substrate due to the multistate reactivity of CYP and the many reactive sites in the pinene scaffold. Up until now, the detailed mechanism of these biocatalytic transformations of pinenes have not been reported. Hereby, we report a systematic theoretical study of the plausible hydrogen abstraction and hydroxylation reactions of α- and β-pinenes by CYP using the density functional theory (DFT) method. All DFT calculations in this study were based on B3LYP/LAN computational methodology using the Gaussian09 software. We used the B3LYP functional with corrections for dispersive forces, BSSE, and anharmonicity to study the mechanism and thermodynamic properties of these reactions using a bare model (without CYP) and a pinene-CYP model. According to the potential energy surface and Boltzmann distribution for radical conformers, the major reaction products of CYP-catalyzed hydrogen abstraction from β-pinene are the doublet trans (53.4%) and doublet cis (46.1%) radical conformer at delta site. The formation of doublet cis/trans hydroxylated products released a total Gibbs free energy of about 48 kcal/mol. As for alpha pinene, the most stable radicals were trans-doublet (86.4%) and cis-doublet (13.6%) at epsilon sites, and their hydroxylation products released a total of ~50 kcal/mol Gibbs free energy. Our results highlight the likely C-H abstraction and oxygen rebounding sites accounting for the multi-state of CYP (doublet, quartet, and sextet spin states) and the formation of different conformers due to the presence of cis/trans allylic hydrogen in α-pinene and β-pinene molecules.
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Affiliation(s)
- Janah Shaya
- Department of Chemistry, College of Arts and Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Lujain Aloum
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Chung-Shin Lu
- Department of General Education, National Taichung University of Science and Technology, Taichung 404, Taiwan, China
| | - Peter R Corridon
- Department of Immunology and Physiology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
- Biomedical Engineering and Healthcare Engineering Innovation Center, Khalifa University, Abu Dhabi 127788, United Arab Emirates
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Abdulrahman Aoudi
- Department of Chemistry, College of Arts and Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Abeer Shunnar
- Department of Chemistry, College of Arts and Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
| | - Eman Alefishat
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
- Center for Biotechnology, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
- Department of Biopharmaceutics and Clinical Pharmacy, School of Pharmacy, The University of Jordan, Amman 11972, Jordan
| | - Georg Petroianu
- Department of Pharmacology, College of Medicine and Health Sciences, Khalifa University of Science and Technology, Abu Dhabi 127788, United Arab Emirates
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Hansberg W. Monofunctional Heme-Catalases. Antioxidants (Basel) 2022; 11:2173. [PMID: 36358546 PMCID: PMC9687031 DOI: 10.3390/antiox11112173] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/15/2022] [Accepted: 10/17/2022] [Indexed: 09/17/2023] Open
Abstract
The review focuses on four issues that are critical for the understanding of monofunctional catalases. How hydrogen peroxide (H2O2) reaches the active site and outcompetes water molecules to be able to function at a very high rate is one of the issues examined. Part of the answer is a gate valve system that is instrumental to drive out solvent molecules from the final section of the main channel. A second issue relates to how the enzyme deals with an unproductive reactive compound I (Cpd I) intermediate. Peroxidatic two and one electron donors and the transfer of electrons to the active site from NADPH and other compounds are reviewed. The new ascribed catalase reactions are revised, indicating possible measurement pitfalls. A third issue concerns the heme b to heme d oxidation, why this reaction occurs only in some large-size subunit catalases (LSCs), and the possible role of singlet oxygen in this and other modifications. The formation of a covalent bond between the proximal tyrosine with the vicinal residue is analyzed. The last issue refers to the origin and function of the additional C-terminal domain (TD) of LSCs. The TD has a molecular chaperone activity that is traced to a gene fusion between a Hsp31-type chaperone and a small-size subunit catalase (SSC).
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Affiliation(s)
- Wilhelm Hansberg
- Departamento de Biología Celular y del Desarrollo, Instituto de Fisiología Celular, Universidad Nacional Autónoma de México (UNAM), Mexico City 04510, Mexico
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Rai R, Singh S, Rai KK, Raj A, Sriwastaw S, Rai LC. Regulation of antioxidant defense and glyoxalase systems in cyanobacteria. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 168:353-372. [PMID: 34700048 DOI: 10.1016/j.plaphy.2021.09.037] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 09/09/2021] [Accepted: 09/28/2021] [Indexed: 05/19/2023]
Abstract
Oxidative stress is common consequence of abiotic stress in plants as well as cyanobacteria caused by generation of reactive oxygen species (ROS), an inevitable product of respiration and photosynthetic electron transport. ROS act as signalling molecule at low concentration however, when its production exceeds the endurance capacity of antioxidative defence system, the organisms suffer oxidative stress. A highly toxic metabolite, methylglyoxal (MG) is also produced in cyanobacteria in response to various abiotic stresses which consequently augment the ensuing oxidative damage. Taking recourse to the common lineage of eukaryotic plants and cyanobacteria, it would be worthwhile to explore the regulatory role of glyoxalase system and antioxidative defense mechanism in combating abiotic stress in cyanobacteria. This review provides comprehensive information on the complete glyoxalase system (GlyI, GlyII and GlyIII) in cyanobacteria. Furthermore, it elucidates the recent understanding regarding the production of ROS and MG, noteworthy link between intracellular MG and ROS and its detoxification via synchronization of antioxidants (enzymatic and non-enzymatic) and glyoxalase systems using glutathione (GSH) as common co-factor.
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Affiliation(s)
- Ruchi Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Shilpi Singh
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Krishna Kumar Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Alka Raj
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - Sonam Sriwastaw
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India
| | - L C Rai
- Molecular Biology Section, Centre of Advanced Study in Botany, Institute of Science, Banaras Hindu University, Varanasi, 221005, India.
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Xu X, Yan S, Hou X, Song W, Wang L, Wu T, Qi M, Wu J, Rao Y, Wang B, Liu L. Local Electric Field Modulated Reactivity of Pseudomonas aeruginosa Acid Phosphatase for Enhancing Phosphorylation of l-Ascorbic Acid. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xin Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Shengheng Yan
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen 360015, P. R. China
| | - Xiaodong Hou
- State Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P. R. China
| | - Wei Song
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China
| | - Lei Wang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Tianfu Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Mengya Qi
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
| | - Jing Wu
- School of Pharmaceutical Science, Jiangnan University, Wuxi 214122, P. R. China
| | - Yijian Rao
- State Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, P. R. China
| | - Binju Wang
- State Key Laboratory of Physical Chemistry of Solid Surfaces and Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen 360015, P. R. China
| | - Liming Liu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, P. R. China
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Yadav R, Awasthi N, Shukla A, Kumar D. Modeling the hydroxylation of estragole via human liver cytochrome P450. J Mol Model 2021; 27:199. [PMID: 34117581 DOI: 10.1007/s00894-021-04815-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/02/2021] [Indexed: 10/21/2022]
Abstract
Natural compounds derived from plants are generally regarded safe and devoid of adverse effects. However, there are individual ingredients that possess toxic, genotoxic, and carcinogenic activities. These compounds when exposed at specific level become hazardous to health. Estragole (1-allyl-4-methoxybenzene) is a common component of spice plants. Its toxicity gets activated with the hydroxylation at benzylic carbon (C1') position by P450 enzymes present in the human liver. The present study grounds to explore the reaction mechanism of conversion of estragole to hydroxylated metabolite using computational methodology. Density functional theory (DFT)-based calculations were employed to explore the cytochrome P450-catalyzed mechanism at C1 position aliphatic hydroxylation of estragole. Overall reaction energy profile, electronic configuration, and 3D structure of all intermediates, transition states, and product complexes formed during the reaction along with their free energies were tried to be investigated.
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Affiliation(s)
- Rolly Yadav
- Molecular Modeling Lab, Department of Physics, School of Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, UP, 226025, India
| | - Nidhi Awasthi
- Molecular Modeling Lab, Department of Physics, School of Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, UP, 226025, India
| | - Anamika Shukla
- Molecular Modeling Lab, Department of Physics, School of Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, UP, 226025, India
| | - Devesh Kumar
- Molecular Modeling Lab, Department of Physics, School of Physical and Decision Sciences, Babasaheb Bhimrao Ambedkar University, Lucknow, UP, 226025, India.
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6
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Bím D, Alexandrova AN. Local Electric Fields as a Natural Switch of Heme-Iron Protein Reactivity. ACS Catal 2021; 11:6534-6546. [PMID: 34413991 DOI: 10.1021/acscatal.1c00687] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Heme-iron oxidoreductases operating through the high-valent FeIVO intermediates perform crucial and complicated transformations, such as oxidations of unreactive saturated hydrocarbons. These enzymes share the same Fe coordination, only differing by the axial ligation, e.g., Cys in P450 oxygenases, Tyr in catalases, and His in peroxidases. By examining ~200 heme-iron proteins, we show that the protein hosts exert highly specific intramolecular electric fields on the active sites, and there is a strong correlation between the direction and magnitude of this field and the protein function. In all heme proteins, the field is preferentially aligned with the Fe-O bond ( Fz ). The Cys-ligated P450 oxygenases have the highest average Fz of 28.5 MV cm-1, i.e., most enhancing the oxyl-radical character of the oxo group, and consistent with the ability of these proteins to activate strong C-H bonds. In contrast, in Tyr-ligated proteins, the average Fz is only 3.0 MV cm-1, apparently suppressing single-electron off-pathway oxidations, and in His-ligated proteins, Fz is -8.7 MV cm-1. The operational field range is given by the trade-off between the low reactivity of the FeIVO Compound I at the more negative Fz , and the low selectivity at the more positive Fz . Consequently, a heme-iron site placed in the field characteristic of another heme-iron protein class loses its canonical function, and gains an adverse one. Thus, electric fields produced by the protein scaffolds, together with the nature of the axial ligand, control all heme-iron chemistry.
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Affiliation(s)
- Daniel Bím
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095-1569, United States
| | - Anastassia N. Alexandrova
- Department of Chemistry and Biochemistry, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095-1569, United States
- California NanoSystems Institute, University of California, Los Angeles, 570 Westwood Plaza, Los Angeles, California 90095-1569, United States
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7
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Ma Z, Nakatani N, Fujii H, Hada M. Effect of External Electric Fields on the Oxidation Reaction of Olefins by Fe(IV)OCl–Porphyrin Complexes. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190293] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhifeng Ma
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Naoki Nakatani
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Hiroshi Fujii
- Department of Chemistry, Graduate School of Humanities and Science, Nara Women’s University, Kitauoyanishi, Nara 630-8506, Japan
| | - Masahiko Hada
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami-Osawa, Hachioji, Tokyo 192-0397, Japan
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8
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Reyes YIA, Franco FC. DFT study on the effect of proximal residues on the Mycobacterium tuberculosis catalase-peroxidase (katG) heme compound I intermediate and its bonding interaction with isoniazid. Phys Chem Chem Phys 2019; 21:16515-16525. [PMID: 31298238 DOI: 10.1039/c9cp01465a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isoniazid (INH) is converted into isonicotinyl radical through its interaction with the catalase-peroxidase (katG) enzyme present in the cells of Mycobacterium tuberculosis (M. tb.), the bacteria that causes the tuberculosis disease. This process is important because resistance of M. tb. cells to INH treatment has been associated with the failure of completion of this process. However, this process is poorly understood and there are a variety of conflicting theories about the details of the mechanism of this process. One theory suggests that INH binds to katG and transfers a single electron to the heme while the heme is in its two electron oxidized state, compound I [Fe(iv)Por˙+] (CpdI). In this study, DFT calculations at the UB3LYP/6-31g(d)-LANL2DZ level of theory are used to study the M. tb. katG CpdI molecule. Different models of the M. tb. CpdI molecule were prepared and the calculations revealed the impact of Trp321 on the electronic properties of the heme. Without Trp321 the heme assumed a triradical state with single electrons on the πxy and πyz orbitals of Fe and another on the a2u orbital of the porphyrin ring that can either be coupled with the first two, to assume a quartet state, or decoupled to form a doublet state. With Trp321, however, a transfer of an electron from the πTrp orbital to a2u porphyrin orbital leads to loss of radical character of the porphyrin and leaves the Trp321 group with a radical character. INH was observed to have strong interaction with CpdI and the absence of Trp321 significantly decreased the binding energy by 2 kcal mol-1 explaining the importance of Trp321 in the binding of INH. The results in this study show the importance of Trp321 in the binding of INH and its effect on its electronic properties, which is consistent with previous experimental findings that mutation of Trp321 results in an increase in drug resistance.
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Affiliation(s)
- Yves Ira A Reyes
- Chemistry Department, De La Salle University, 2401 Taft Avenue, 0922 Manila, Philippines.
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9
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Calvete MJF, Piñeiro M, Dias LD, Pereira MM. Hydrogen Peroxide and Metalloporphyrins in Oxidation Catalysis: Old Dogs with Some New Tricks. ChemCatChem 2018. [DOI: 10.1002/cctc.201800587] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Mário J. F. Calvete
- Centro de Química de Coimbra (CQC); Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
| | - Marta Piñeiro
- Centro de Química de Coimbra (CQC); Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
| | - Lucas D. Dias
- Centro de Química de Coimbra (CQC); Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
| | - Mariette M. Pereira
- Centro de Química de Coimbra (CQC); Department of Chemistry; University of Coimbra; Rua Larga 3004-535 Coimbra Portugal
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10
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Biodegradation of Cosmetics Products: A Computational Study of Cytochrome P450 Metabolism of Phthalates. INORGANICS 2017. [DOI: 10.3390/inorganics5040077] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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11
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de Visser SP, Stillman MJ. Challenging Density Functional Theory Calculations with Hemes and Porphyrins. Int J Mol Sci 2016; 17:519. [PMID: 27070578 PMCID: PMC4848975 DOI: 10.3390/ijms17040519] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Revised: 03/22/2016] [Accepted: 03/23/2016] [Indexed: 01/09/2023] Open
Abstract
In this paper we review recent advances in computational chemistry and specifically focus on the chemical description of heme proteins and synthetic porphyrins that act as both mimics of natural processes and technological uses. These are challenging biochemical systems involved in electron transfer as well as biocatalysis processes. In recent years computational tools have improved considerably and now can reproduce experimental spectroscopic and reactivity studies within a reasonable error margin (several kcal·mol(-1)). This paper gives recent examples from our groups, where we investigated heme and synthetic metal-porphyrin systems. The four case studies highlight how computational modelling can correctly reproduce experimental product distributions, predicted reactivity trends and guide interpretation of electronic structures of complex systems. The case studies focus on the calculations of a variety of spectroscopic features of porphyrins and show how computational modelling gives important insight that explains the experimental spectra and can lead to the design of porphyrins with tuned properties.
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Affiliation(s)
- Sam P de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science, the University of Manchester, 131 Princess Street, Manchester M1 7DN, UK.
| | - Martin J Stillman
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada.
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12
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Polarizability study of nematic liquid crystal 4-cyano-4′-pentylbiphenyl (5CB) and its nitrogen derivatives. Chem Phys 2015. [DOI: 10.1016/j.chemphys.2015.03.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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De Petris A, Crestoni ME, Pirolli A, Rovira C, Iglesias-Fernández J, Chiavarino B, Ragno R, Fornarini S. Binding of azole drugs to heme: A combined MS/MS and computational approach. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.02.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Sainna MA, Kumar S, Kumar D, Fornarini S, Crestoni ME, de Visser SP. A comprehensive test set of epoxidation rate constants for iron(iv)-oxo porphyrin cation radical complexes. Chem Sci 2015; 6:1516-1529. [PMID: 29560240 PMCID: PMC5811088 DOI: 10.1039/c4sc02717e] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Accepted: 12/08/2014] [Indexed: 12/31/2022] Open
Abstract
Cytochrome P450 enzymes are heme based monoxygenases that catalyse a range of oxygen atom transfer reactions with various substrates, including aliphatic and aromatic hydroxylation as well as epoxidation reactions. The active species is short-lived and difficult to trap and characterize experimentally, moreover, it reacts in a regioselective manner with substrates leading to aliphatic hydroxylation and epoxidation products, but the origin of this regioselectivity is poorly understood. We have synthesized a model complex and studied it with low-pressure Fourier transform-ion cyclotron resonance (FT-ICR) mass spectrometry (MS). A novel approach was devised using the reaction of [FeIII(TPFPP)]+ (TPFPP = meso-tetrakis(pentafluorophenyl)porphinato dianion) with iodosylbenzene as a terminal oxidant which leads to the production of ions corresponding to [FeIV(O)(TPFPP+˙)]+. This species was isolated in the gas-phase and studied in its reactivity with a variety of olefins. Product patterns and rate constants under Ideal Gas conditions were determined by FT-ICR MS. All substrates react with [FeIV(O)(TPFPP+˙)]+ by a more or less efficient oxygen atom transfer process. In addition, substrates with low ionization energies react by a charge-transfer channel, which enabled us to determine the electron affinity of [FeIV(O)(TPFPP+˙)]+ for the first time. Interestingly, no hydrogen atom abstraction pathways are observed for the reaction of [FeIV(O)(TPFPP+˙)]+ with prototypical olefins such as propene, cyclohexene and cyclohexadiene and also no kinetic isotope effect in the reaction rate is found, which suggests that the competition between epoxidation and hydroxylation - in the gas-phase - is in favour of substrate epoxidation. This notion further implies that P450 enzymes will need to adapt their substrate binding pocket, in order to enable favourable aliphatic hydroxylation over double bond epoxidation pathways. The MS studies yield a large test-set of experimental reaction rates of iron(iv)-oxo porphyrin cation radical complexes, so far unprecedented in the gas-phase, providing a benchmark for calibration studies using computational techniques. Preliminary computational results presented here confirm the observed trends excellently and rationalize the reactivities within the framework of thermochemical considerations and valence bond schemes.
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Affiliation(s)
- Mala A Sainna
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science , The University of Manchester , 131 Princess Street , Manchester M1 7DN , UK .
| | - Suresh Kumar
- Department of Applied Physics , School for Physical Sciences , Babasaheb Bhimrao Ambedkar University , Vidya Vihar, Rai Bareilly Road , Lucknow 226 025 , India .
| | - Devesh Kumar
- Department of Applied Physics , School for Physical Sciences , Babasaheb Bhimrao Ambedkar University , Vidya Vihar, Rai Bareilly Road , Lucknow 226 025 , India .
| | - Simonetta Fornarini
- Dipartimento di Chimica e Tecnologie del Farmaco , Università di Roma "La Sapienza" , P.le A. Moro 5 , 00185 , Roma , Italy . ;
| | - Maria Elisa Crestoni
- Dipartimento di Chimica e Tecnologie del Farmaco , Università di Roma "La Sapienza" , P.le A. Moro 5 , 00185 , Roma , Italy . ;
| | - Sam P de Visser
- Manchester Institute of Biotechnology and School of Chemical Engineering and Analytical Science , The University of Manchester , 131 Princess Street , Manchester M1 7DN , UK .
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Bushnell EAC, Gherib R, Gauld JW. Insights into the Catalytic Mechanism of Coral Allene Oxide Synthase: A Dispersion Corrected Density Functional Theory Study. J Phys Chem B 2013; 117:6701-10. [DOI: 10.1021/jp403405b] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric A. C. Bushnell
- Department of Chemistry and Biochemistry,
University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - Rami Gherib
- Department of Chemistry and Biochemistry,
University of Windsor, Windsor, Ontario N9B 3P4, Canada
| | - James W. Gauld
- Department of Chemistry and Biochemistry,
University of Windsor, Windsor, Ontario N9B 3P4, Canada
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16
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The reaction mechanisms of heme catalases: an atomistic view by ab initio molecular dynamics. Arch Biochem Biophys 2012; 525:121-30. [PMID: 22516655 DOI: 10.1016/j.abb.2012.04.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 03/31/2012] [Accepted: 04/04/2012] [Indexed: 11/21/2022]
Abstract
Catalases are ubiquitous enzymes that prevent cell oxidative damage by degrading hydrogen peroxide to water and oxygen (2H(2)O(2) → 2H(2)O+O(2)) with high efficiency. The enzyme is first oxidized to a high-valent iron intermediate, known as Compound I (Cpd I, Por(·+)-Fe(IV)=O) which, at difference from other hydroperoxidases, is reduced back to the resting state by further reacting with H(2)O(2). The normal catalase activity is reduced if Cpd I is consumed in a competing side reaction, forming a species named Cpd I*. In recent years, Density Functional Theory (DFT) methods have unraveled the electronic configuration of these high-valent iron species, helping to assign the intermediates trapped in the crystal structures of oxidized catalases. It has been demonstrated that the a priori assumption that the H(+)/H(-) type of mechanism for Cpd I reduction leads to the generation of singlet oxygen is not justified. Moreover, it has been shown by ab initio metadynamics simulations that two pathways are operative for Cpd I reduction: a His-mediated mechanism (described as H·/H(+) + e(-)) in which the distal His acts as an acid-base catalyst and a direct mechanism (described as H·/H·) in which the distal His does not play a direct role. Independently of the mechanism, the reaction proceeds by two one-electron transfers rather than one two-electron transfer, as previously assumed. Electron transfer to Cpd I, regardless of whether the electron is exogenous or endogenous, facilitates protonation of the oxoferryl group, to the point that formation of Cpd I* may be controlled by the easiness of protonation of reduced Cpd I.
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Pinter TBJ, Dodd EL, Bohle DS, Stillman MJ. Spectroscopic and theoretical studies of Ga(III)protoporphyrin-IX and its reactions with myoglobin. Inorg Chem 2012; 51:3743-53. [PMID: 22372462 DOI: 10.1021/ic202731g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ga(III)protoporphyrin-IX (Ga-PP) has been proposed as a model for the key interporphyrin interactions in malaria pigment. Unlike the paramagnetic parent iron heme derivatives, Ga-PP is readily soluble in methanol (MeOH). We report optical, mass spectroscopic, and theoretical results for Ga-PP as well as its reactions with myoglobin. UV-visible absorption and MCD spectroscopy show that Ga-PP exhibits a typical spectrum for a main group metal: a Q-band at 539 nm and a B band at 406 nm when dissolved in MeOH. We also report optical data for Zn(II)protoporphyrin IX (Zn-PP) dissolved in MeOH, which exhibits a Q-band at 545 nm and a B band at 415 nm. ESI mass spectral data for Ga-PP dissolved in MeOH show the presence of predominantly monomers, with smaller fractions of dimers [(Ga-PP)(2)] and trimers. UV-visible and MCD absorption spectroscopy and ESI mass spectral data demonstrate the successful insertion of monomeric Ga-PP into apo-Mb. Ga-PP-Mb exhibits a B band at 417 nm and Q bands at 545 and 584 nm, which are all red-shifted from the free Ga-PP values. The calculated electronic structures and frontier molecular orbitals of Ga-PP, (Ga-PP)(2) and Zn-PP fit the previously reported trends in band energies and oscillator strengths as a function of molecular orbital energies. These new data can be applied to explain the experimentally observed optical spectroscopy. The observed Q-band energies are accounted for by calculated (HOMO-LUMO) gap of the frontier MOs, while the split in the two top occupied MOs accounts for the magnitude of the Q-band oscillator strength as well as the experimentally observed Q to B band energy separation. Although Ga-PP shares more spectroscopic properties with Zn-PP than it does with Fe(III)PPIX, the trivalent oxidation state allows this molecule to be used as a model for ferric hemes in heme proteins.
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Affiliation(s)
- Tyler B J Pinter
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
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18
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De Paula R, Simões MM, Neves MGP, Cavaleiro JA. Oxidation of styrene and of some derivatives with H2O2 catalyzed by novel imidazolium-containing manganese porphyrins: A mechanistic and thermodynamic interpretation. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.05.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Alfonso-Prieto M, Oberhofer H, Klein ML, Rovira C, Blumberger J. Proton Transfer Drives Protein Radical Formation in Helicobacter pylori Catalase but Not in Penicillium vitale Catalase. J Am Chem Soc 2011; 133:4285-98. [DOI: 10.1021/ja1110706] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Alfonso-Prieto
- Computer Simulation & Modeling Laboratory, Parc Científic de Barcelona, Baldiri Reixac 4, 08028 Barcelona, Spain
- Institute for Computational Molecular Science, Temple University, 1900 North 12th Street, Philadelphia, Pennsylvania 19122, United States
| | - H. Oberhofer
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - M. L. Klein
- Institute for Computational Molecular Science, Temple University, 1900 North 12th Street, Philadelphia, Pennsylvania 19122, United States
| | - C. Rovira
- Computer Simulation & Modeling Laboratory, Parc Científic de Barcelona, Baldiri Reixac 4, 08028 Barcelona, Spain
- Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, 08028 Barcelona, Spain
- Institució Catalana de Recerca i Estudis Avançats (ICREA), 08010 Barcelona, Spain
| | - J. Blumberger
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
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Noack H, Georgiev V, Blomberg MRA, Siegbahn PEM, Johansson AJ. Theoretical insights into heme-catalyzed oxidation of cyclohexane to adipic acid. Inorg Chem 2011; 50:1194-202. [PMID: 21268602 DOI: 10.1021/ic101405u] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Adipic acid is a key compound in the chemical industry, where it is mainly used in the production of polymers. The conventional process of its generation requires vast amounts of energy and, moreover, produces environmentally deleterious substances. Thus, there is interest in alternative ways to gain adequate amounts of adipic acid. Experimental reports on a one-pot iron-catalyzed conversion of cyclohexane to adipic acid motivated a theoretical investigation based on density functional theory calculations. The process investigated is interesting because it requires less energy than contemporary methods and does not produce environmentally harmful side products. The aim of the present contribution is to gain insight into the mechanism of the iron-catalyzed cyclohexane conversion to provide a basis for the further development of this process. The rate-limiting step of the process is discussed, but considering the accuracy of the calculations, it is difficult to ensure whether the rate-limiting step is in the substrate oxidation or in the generation of the catalytically active species. It is shown that the slowest step in the substrate oxidation is the conversion of cyclohexanol to cyclohexane-1,2-diol. Hydrogen-atom transfer from one of the OH groups of cyclohexane-1,2-diol makes the intradiol cleavage occur spontaneously.
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Affiliation(s)
- Holger Noack
- Department of Physics, Albanova, Arrhenius Laboratories, Stockholm University, S-106 91 Stockholm, Sweden
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21
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Alfonso-Prieto M, Biarnés X, Vidossich P, Rovira C. The Molecular Mechanism of the Catalase Reaction. J Am Chem Soc 2009; 131:11751-61. [DOI: 10.1021/ja9018572] [Citation(s) in RCA: 228] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mercedes Alfonso-Prieto
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional (IQTCUB), and Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Xevi Biarnés
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional (IQTCUB), and Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Pietro Vidossich
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional (IQTCUB), and Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Carme Rovira
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional (IQTCUB), and Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
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22
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Porro CS, Kumar D, de Visser SP. Electronic properties of pentacoordinated heme complexes in cytochrome P450 enzymes: search for an Fe(i) oxidation state. Phys Chem Chem Phys 2009; 11:10219-26. [DOI: 10.1039/b911966c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Alfonso-Prieto M, Vidossich P, Rodríguez-Fortea A, Carpena X, Fita I, Loewen PC, Rovira C. Electronic State of the Molecular Oxygen Released by Catalase. J Phys Chem A 2008; 112:12842-8. [DOI: 10.1021/jp801512h] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mercedes Alfonso-Prieto
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Pietro Vidossich
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Antonio Rodríguez-Fortea
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Xavi Carpena
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Ignacio Fita
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Peter C. Loewen
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
| | - Carme Rovira
- Laboratori de Simulació Computacional i Modelització (CoSMoLab), Parc Científic de Barcelona, Baldiri Reixac 10-12, 08028 Barcelona, Spain, Institut de Química Teòrica i Computacional de la Universitat de Barcelona (IQTCUB), Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel.lí Domingo s/n, 43007 Tarragona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain,Department
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Abstract
Excessive hydrogen peroxide is harmful for almost all cell components, so its rapid and efficient removal is of essential importance for aerobically living organisms. Conversely, hydrogen peroxide acts as a second messenger in signal-transduction pathways. H(2)O(2) is degraded by peroxidases and catalases, the latter being able both to reduce H(2)O(2) to water and to oxidize it to molecular oxygen. Nature has evolved three protein families that are able to catalyze this dismutation at reasonable rates. Two of the protein families are heme enzymes: typical catalases and catalase-peroxidases. Typical catalases comprise the most abundant group found in Eubacteria, Archaeabacteria, Protista, Fungi, Plantae, and Animalia, whereas catalase-peroxidases are not found in plants and animals and exhibit both catalatic and peroxidatic activities. The third group is a minor bacterial protein family with a dimanganese active site called manganese catalases. Although catalyzing the same reaction (2 H(2)O(2)--> 2 H(2)O+ O(2)), the three groups differ significantly in their overall and active-site architecture and the mechanism of reaction. Here, we present an overview of the distribution, phylogeny, structure, and function of these enzymes. Additionally, we report about their physiologic role, response to oxidative stress, and about diseases related to catalase deficiency in humans.
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Affiliation(s)
- Marcel Zamocky
- Department of Chemistry, Division of Biochemistry, BOKU-University of Natural Resources and Applied Life Sciences, Vienna, Austria.
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Sicking W, Korth HG, de Groot H, Sustmann R. On the functional role of a water molecule in clade 3 catalases: a proposal for the mechanism by which NADPH prevents the formation of compound II. J Am Chem Soc 2008; 130:7345-56. [PMID: 18479132 DOI: 10.1021/ja077787e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
X-ray structures of the 13 different monofunctional heme catalases published to date were scrutinized in order to gain insight in the mechanism by which NADPH in Clade 3 catalases may protect the reactive ferryloxo intermediate Compound I (Cpd I; por (*+)Fe (IV)O) against deactivation to the catalytically inactive intermediate Compound II (Cpd II; porFe (IV)O). Striking similarities in the molecular network of the protein subunits encompassing the heme center and the surface-bound NADPH were found for all of the Clade 3 catalases. Unique features in this region are the presence of a water molecule (W1) adjacent to the 4-vinyl group of heme and a serine residue or a second water molecule hydrogen-bonded to both W1 and the carbonyl group of a threonine-proline linkage, with the proline in van der Waals contact with the dihydronicotinamide group of NADPH. A mechanism is proposed in which a hydroxyl anion released from W1 undergoes reversible nucleophilic addition to the terminal carbon of the 4-vinyl group of Cpd I, thereby producing a neutral porphyrin pi-radical ferryloxo (HO-por (*)Fe (IV)O) species of reduced reactivity. This structure is suggested to be the elusive Cpd II' intermediate proposed in previous studies. An accompanying proton-shifting process along the hydrogen-bonded network is believed to facilitate the NADPH-mediated reduction of Cpd I to ferricatalase and to serve as a funnel for electron transfer from NADPH to the heme center to restore the catalase Fe (III) resting state. The proposed reaction paths were fully supported as chemically reasonable and energetically feasible by means of density functional theory calculations at the (U)B3LYP/6-31G* level. A particularly attractive feature of the present mechanism is that the previously discussed formation of protein-derived radicals is avoided.
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Affiliation(s)
- Willi Sicking
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany
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Sustmann R, Korth HG, Kobus D, Baute J, Seiffert KH, Verheggen E, Bill E, Kirsch M, de Groot H. FeIII Complexes of 1,4,8,11-Tetraaza[14]annulenes as Catalase Mimics. Inorg Chem 2007; 46:11416-30. [DOI: 10.1021/ic700961b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Reiner Sustmann
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Hans-Gert Korth
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Diana Kobus
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Jörg Baute
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Karl-Heinz Seiffert
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Elisabeth Verheggen
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Eckhard Bill
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Michael Kirsch
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
| | - Herbert de Groot
- Institut für Organische Chemie, Universität Duisburg-Essen, 45117 Essen, Germany, Max-Planck Institut für Bioanorganische Chemie, 45470 Mülheim an der Ruhr, Germany, and Institut für Physiologische Chemie, Universitätsklinikum Essen, 45122 Essen, Germany
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Vidossich P, Alfonso-Prieto M, Carpena X, Loewen PC, Fita I, Rovira C. Versatility of the Electronic Structure of Compound I in Catalase-Peroxidases. J Am Chem Soc 2007; 129:13436-46. [DOI: 10.1021/ja072245i] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Pietro Vidossich
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Mercedes Alfonso-Prieto
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Xavi Carpena
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Peter C. Loewen
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Ignacio Fita
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
| | - Carme Rovira
- Contribution from the Centre de Recerca en Química Teòrica, Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Institut de Biologia Molecular (IBMB-CSIC), Institut de Recerca Biomèdica (IRB), Parc Científic de Barcelona, Josep Samitier 1-5, 08028 Barcelona, Spain, Department of Microbiology, University of Manitoba, Winnipeg MB R3T 2N2, Canada, Institució Catalana de Recerca i Estudis Avançats (ICREA), Passeig Lluís Companys, 23, 08018 Barcelona, Spain
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