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Song X, Lu J, Lai W. Mechanistic insights into dioxygen activation, oxygen atom exchange and substrate epoxidation by AsqJ dioxygenase from quantum mechanical/molecular mechanical calculations. Phys Chem Chem Phys 2018; 19:20188-20197. [PMID: 28726913 DOI: 10.1039/c7cp02687k] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Herein, we use in-protein quantum mechanical/molecular mechanical (QM/MM) calculations to elucidate the mechanism of dioxygen activation, oxygen atom exchange and substrate epoxidation processes by AsqJ, an FeII/α-ketoglutarate-dependent dioxygenase (α-KGD) using a 2-His-1-Asp facial triad. Our results demonstrated that the whole reaction proceeds through a quintet surface. The dioxygen activation by AsqJ leads to a quintet penta-coordinated FeIV-oxo species, which has a square pyramidal geometry with the oxo group trans to His134. This penta-coordinated FeIV-oxo species is not the reactive one in the substrate epoxidation reaction since its oxo group is pointing away from the target C[double bond, length as m-dash]C bond. Instead, it can undergo the oxo group isomerization followed by water binding or the water binding followed by oxygen atom exchange to form the reactive hexa-coordinated FeIV-oxo species with the oxo group trans to His211. The calculated parameters of Mössbauer spectra for this hexa-coordinated FeIV-oxo intermediate are in excellent agreement with the experimental values, suggesting that it is most likely the experimentally trapped species. The calculated energetics indicated that the rate-limiting step is the substrate C[double bond, length as m-dash]C bond activation. This work improves our understanding of the dioxygen activation by α-KGD and provides important structural information about the reactive FeIV-oxo species.
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Affiliation(s)
- Xudan Song
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
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Sarswat PK, Mishra YK, Free ML. Fabrication and response of alpha-hydroxybutyrate sensors for rapid assessment of cardiometabolic disease risk. Biosens Bioelectron 2017; 89:334-342. [DOI: 10.1016/j.bios.2016.07.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 06/24/2016] [Accepted: 07/07/2016] [Indexed: 10/21/2022]
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Budanur BM, Khan FA. Superoxide chemistry revisited: synthesis of tetrachloro-substituted methylenenortricyclenes. Beilstein J Org Chem 2014; 10:2531-8. [PMID: 25383124 PMCID: PMC4222393 DOI: 10.3762/bjoc.10.264] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2014] [Accepted: 10/21/2014] [Indexed: 11/26/2022] Open
Abstract
An unexpected reactivity of the superoxide ion leading to the synthesis of tetrachloroaryl/vinyl-substituted nortricyclenes through its dual mode of action has been reported. KO2 was found to be superior and the only reagent to perform this kind of reaction over other conventional bases. Addition of the antioxidant BHT (2,6-di-tert-butyl-4-methylphenol) improved the yields of methylenenortricyclenes. A complete deuterium incorporation was observed in the superoxide-mediated reaction in DMSO-d 6. Friedel-Crafts acylation reactions of 3-methylenenorticyclenes yielded 2-propanone-substituted pentachloronorbornenes.
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Affiliation(s)
- Basavaraj M Budanur
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Faiz Ahmed Khan
- Department of Chemistry, Indian Institute of Technology Hyderabad, Ordnance Factory Estate, Yeddumailaram-502205, India
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Abstract
From a generated PES, one can determine the relative energies of species involved, the sequence in which they occur, and the activation barrier(s) associated with individual steps or the overall mechanism. Furthermore, they can provide more insights than a simple indication of a path of sequential mechanistic structures and their energetic relationships. The investigation into the activation of O2 by alpha-ketoglutarate-dependent dioxygenase (AlkB) clearly shows the opportunity for spin inversion, where one can see that the lowest energy product may be formed via several possible routes. In the investigation of uroporphyrinogen decarboxylase III (UROD), the use of QM/MM methods allowed for the inclusion of the anisotropic protein environment providing greater insight into the rate-limiting barrier. Lastly, the mechanism of 6-phospho-α-glucosidase (GlvA) was discussed using different active site models. In particular, a continuum model PES was compared to the gas-phase PES.
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Application of 12CaO•7Al2O3 electride as a new electrode for superoxide ion generation and hydroxylation of an arylboronic acid. Electrochem commun 2012. [DOI: 10.1016/j.elecom.2012.01.024] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Kotani H, Ohkubo K, Crossley MJ, Fukuzumi S. An Efficient Fluorescence Sensor for Superoxide with an Acridinium Ion-Linked Porphyrin Triad. J Am Chem Soc 2011; 133:11092-5. [DOI: 10.1021/ja204161j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiroaki Kotani
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, and ALCA, Japan Science and Technology (JST), Suita, Osaka 565-0871, Japan
| | - Kei Ohkubo
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, and ALCA, Japan Science and Technology (JST), Suita, Osaka 565-0871, Japan
| | - Maxwell J. Crossley
- School of Chemistry, Building F11, The University of Sydney, NSW 2006, Australia
| | - Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, and ALCA, Japan Science and Technology (JST), Suita, Osaka 565-0871, Japan
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
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Jana R, Pathak TP, Sigman MS. Advances in transition metal (Pd, Ni, Fe)-catalyzed cross-coupling reactions using alkyl-organometallics as reaction partners. Chem Rev 2011; 111:1417-92. [PMID: 21319862 PMCID: PMC3075866 DOI: 10.1021/cr100327p] [Citation(s) in RCA: 1651] [Impact Index Per Article: 127.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Ranjan Jana
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Tejas P. Pathak
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
| | - Matthew S. Sigman
- Department of Chemistry, University of Utah, 315 South 1400 East, Salt Lake City, Utah 84112-8500
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Liu H, Llano J, Gauld JW. A DFT study of nucleobase dealkylation by the DNA repair enzyme AlkB. J Phys Chem B 2009; 113:4887-98. [PMID: 19338370 DOI: 10.1021/jp810715t] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxidative dealkylation is a unique mechanistic pathway found in the alpha-ketoglutarate-Fe(II)-dependent AlkB family of enzymes to remove the alkylation damage to DNA bases and regenerate nucleobases to their native state. The B3LYP density functional combined with a self-consistent reaction field was used to explore the triplet, quintet, and septet spin-state potential energy surfaces of the multistep catalytic mechanism of AlkB. The mechanism was found to consist of four stages. First, binding of dioxygen to iron in the active-site complex occurs concerted with electron transfer, thereby yielding a ferric-superoxido species. Second, competing initiation for the activation of oxygen to generate the high-valent iron-oxygen intermediates (ferryl-oxo Fe(IV)O and ferric-oxyl Fe(III)O(*) species) was found to occur on the quintet and septet surfaces. Then, conformational reorientation of the activated iron-oxygen ligand was found to be nearly thermoneutral with a barrier of ca. 50 kJ mol(-1). The final stage is the oxidative dealkylation of the damaged nucleobase with the rate-controlling step being the abstraction of a hydrogen atom from the damaging methyl group by the ferryl-oxo ligand. For this step, the calculated barrier of 87.4 kJ mol(-1) is in good agreement with the experimental activation energy of ca. 83 kJ mol(-1) for the enzyme-catalyzed reaction.
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Affiliation(s)
- Haining Liu
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, Ontario N9B 3P4, Canada
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Voß J, Wiegand G, Hülsmeyer K. Elektroreduktion organischer Verbindungen, 6. Elektroreduktion
N
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N
‐disubstituierter Thioamide in Gegenwart von Elektrophilen. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/cber.19851181215] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jürgen Voß
- Institut für Organische Chemie der Universität Hamburg, Martin‐Luther‐King‐Platz 6, D‐2000 Hamburg 13
| | - Gabriele Wiegand
- Institut für Organische Chemie der Universität Hamburg, Martin‐Luther‐King‐Platz 6, D‐2000 Hamburg 13
| | - Karin Hülsmeyer
- Institut für Organische Chemie der Universität Hamburg, Martin‐Luther‐King‐Platz 6, D‐2000 Hamburg 13
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Costas M, Mehn MP, Jensen MP, Que L. Dioxygen Activation at Mononuclear Nonheme Iron Active Sites: Enzymes, Models, and Intermediates. Chem Rev 2004; 104:939-86. [PMID: 14871146 DOI: 10.1021/cr020628n] [Citation(s) in RCA: 2014] [Impact Index Per Article: 100.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Miquel Costas
- Departament de Quimica, Universitat de Girona, 17071, Girona, Spain
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Chai W, Sakamaki H, Kitanaka S, Horiuchi CA. Biotransformation of Cycloalkanediones byCaragana chamlagu. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.177] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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12
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Harata M, Hasegawa K, Jitsukawa K, Masuda H, Einaga H. Preparations, Structures, and Properties of Copper(II) Complexes with a New Tripodal Tetradentate Ligand,N-(2-Pyridylmethyl)bis(6-pivalamido-2-pyridylmethyl)amine, and Reactivities of the Cu(I) Complex with Dioxygen. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1998. [DOI: 10.1246/bcsj.71.1031] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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13
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Yang DTC, Cao YH, Evans TT, Kabalka GW. The Ultrasound Assisted Oxidation of α-Substituted Carbonyl Compounds to Carboxylic Acids. SYNTHETIC COMMUN 1996. [DOI: 10.1080/00397919608004665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Tournaire C, Hocquaux M, Beck I, Oliveros E, Maurette MT. Activité anti-oxydante de flavonoïdes réactivitë avec le superoxyde de potassium en phase hétérogène. Tetrahedron 1994. [DOI: 10.1016/s0040-4020(01)85507-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abdel-Baky S, Sotiriou-Leventis C, Giese RW. Superoxide oxidation of 1-nitropyrene-cis-dihydrodiols. Tetrahedron 1991. [DOI: 10.1016/s0040-4020(01)86519-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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17
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Prell GD, Khandelwal JK, Burns RS, Blandina P, Morrishow AM, Green JP. Levels of pros-methylimidazoleacetic acid: correlation with severity of Parkinson's disease in CSF of patients and with the depletion of striatal dopamine and its metabolites in MPTP-treated mice. JOURNAL OF NEURAL TRANSMISSION. PARKINSON'S DISEASE AND DEMENTIA SECTION 1991; 3:109-25. [PMID: 1910485 DOI: 10.1007/bf02260886] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The cerebrospinal fluid (CSF) levels of pros-methylimidazoleacetic acid (p-MIAA) in thirteen medication-free patients with mild to moderate Parkinson's disease were highly correlated (Spearman's rho = 0.749, p less than 0.005) with the severity of signs of the disease as scored on the Columbia University Rating Scale. Levels of p-MIAA in males (n = 8) and females (n = 5) were each significantly correlated with scores of severity (rho = 0.78, p less than 0.05 and rho = 1.0, p less than 0.05, respectively). In C57BL/6 mice treated with 1-methyl-4-phenyl-1,2,3,6-tetra-hydropyridine (MPTP), levels of p-MIAA were significantly correlated with the depleted levels of dopamine (r = 0.85, p less than 0.01), homovanillic acid (r = 0.79, p less than 0.02), 3,4-dihydroxyphenylacetic acid (r = 0.84, p less than 0.01) and norepinephrine (r = 0.91, p less than 0.002) in striatum, but not in cortex of the same mice. No such correlations were observed in either striatum or cortex of saline-treated control mice. Mean levels of p-MIAA in CSF did not differ significantly between patients and age-matched controls; and mean levels of p-MIAA in striatum did not differ between MPTP-treated mice and controls. The simplest hypothesis to account for these strong correlations in the absence of differences in mean levels of p-MIAA is that accumulation of p-MIAA [or process(es) that govern its accumulation] influences a failing nigrostriatal system. It is also possible (in analogy with findings in other diseases and with other drugs) that measurements of the putative metabolite(s) of p-MIAA may distinguish the patients and the MPTP-treated mice from their respective controls. Elucidation of the processes that regulate formation and disposition of p-MIAA in brain and information on the neural effects of p-MIAA, its precursors and its putative metabolites may yield insight into factors that regulate the progression of Parkinson's disease, and may shed additional light on the cause(s) of this disease.
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Affiliation(s)
- G D Prell
- Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, NY
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Prell GD, Green JP. Histamine metabolites and pros-methylimidazoleacetic acid in human cerebrospinal fluid. AGENTS AND ACTIONS. SUPPLEMENTS 1991; 33:343-63. [PMID: 1828934 DOI: 10.1007/978-3-0348-7309-3_25] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In cerebrospinal fluid, levels of the histamine metabolites, tele-methylhistamine and tele-methylimidazole-acetic acid, were higher in elderly than in young people, and women had higher levels than men. Therefore, age and gender should be considered in studies of histamine metabolites as exemplified by their measurements in cerebrospinal fluid of patients with Huntington's disease. Levels of pros-methylimidazoleacetic acid, an isomer of tele-methylimidazoleacetic acid and not a metabolite of histamine, were higher in cerebrospinal fluid of men than of women. Levels of pros-methylimidazoleacetic acid in cerebrospinal fluid were highly positively correlated with the severity of Parkinson's disease in a group of non-medicated, mildly to moderately affected patients.
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Affiliation(s)
- G D Prell
- Department of Pharmacology, Mount Sinai School of Medicine, City University of New York, New York 10029
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Gallemann D, Eyer P. Formation of hydrogen peroxide during precipitation of red cells with perchloric acid. A cautionary note for precise determination of pyruvate, GSH, and NAD(P)H. Anal Biochem 1990; 191:347-53. [PMID: 1964767 DOI: 10.1016/0003-2697(90)90230-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The instability of pyruvate in neutralized perchloric acid extracts of erythrocytes is well-known from the literature. As shown in this study, the main reason for this phenomenon is a reaction of pyruvate with hydrogen peroxide, which is formed from oxyhemoglobin during acid precipitation. Thereby, pyruvate is oxidized to carbon dioxide and acetate. This decomposition is easily prevented by addition of catalase to the neutralized extracts, whereby authentic pyruvate can be determined precisely. Similarly, GSH and NAD(P)H oxidation in the extracts is prevented by addition of catalase.
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Affiliation(s)
- D Gallemann
- Institut für Pharmakologie, Toxikologie der Universität München, Federal Republic of Germany
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Deby C, Goutier R. New perspectives on the biochemistry of superoxide anion and the efficiency of superoxide dismutases. Biochem Pharmacol 1990; 39:399-405. [PMID: 2154984 DOI: 10.1016/0006-2952(90)90043-k] [Citation(s) in RCA: 119] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- C Deby
- Laboratoire de Biochimie et Radiobiologie, Institut de Chimie, Liège, Belgium
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Ménassa PE, Mak MK, Langford CH. A study of the photodecomposition of different polychlorinated biphenyls by surface modified titanium (iv) oxide particles. ACTA ACUST UNITED AC 1988. [DOI: 10.1080/09593338809384638] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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22
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Sackett DD, Fox MA. Effect of cosolvent additives on relative rates of photooxidation on semiconductor surfaces. J PHYS ORG CHEM 1988. [DOI: 10.1002/poc.610010206] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Hanauske-Abel HM, Günzler V. A stereochemical concept for the catalytic mechanism of prolylhydroxylase: applicability to classification and design of inhibitors. J Theor Biol 1982; 94:421-55. [PMID: 6281585 DOI: 10.1016/0022-5193(82)90320-4] [Citation(s) in RCA: 212] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Dureja P, Casida JE, Ruzo LO. Superoxide-mediated dehydrohalogenation reactions of the pyrethroid permethrin and other chlorinated pesticides. Tetrahedron Lett 1982. [DOI: 10.1016/s0040-4039(00)85557-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Alvarez E, Betancor C, Freire R, Martin A, Suárez E. Reaction of 5α, and 5β,3-keto-steroids with potassium superoxide. Tetrahedron Lett 1981. [DOI: 10.1016/s0040-4039(01)82949-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Sakuragi M, Sakuragi H. PHOTOSENSITIZED OXIDATION OF 1-PHENYLCYCLOBUTENE. THE ROLE OF REACTIVE OXYGEN SPECIES OTHER THAN SINGLET OXYGEN. CHEM LETT 1980. [DOI: 10.1246/cl.1980.1017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Jefford CW, Cadby PA. Chemistry of Superoxide Ion as Revealed by the Differential Oxidation of Arylpyruvates. Helv Chim Acta 1979. [DOI: 10.1002/hlca.19790620615] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Boujlel K, Simonet J. On the electrochemical reduction of α-diketones in the presence of oxygen. Tetrahedron Lett 1979. [DOI: 10.1016/s0040-4039(01)87192-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Jefford CW, Boschung AF. The Reaction of Biadamantylidene with Singlet Oxygen in the Presence of Dyes [1]. Helv Chim Acta 1977. [DOI: 10.1002/hlca.19770600818] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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