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Partipilo M, Claassens NJ, Slotboom DJ. A Hitchhiker's Guide to Supplying Enzymatic Reducing Power into Synthetic Cells. ACS Synth Biol 2023; 12:947-962. [PMID: 37052416 PMCID: PMC10127272 DOI: 10.1021/acssynbio.3c00070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Indexed: 04/14/2023]
Abstract
The construction from scratch of synthetic cells by assembling molecular building blocks is unquestionably an ambitious goal from a scientific and technological point of view. To realize functional life-like systems, minimal enzymatic modules are required to sustain the processes underlying the out-of-equilibrium thermodynamic status hallmarking life, including the essential supply of energy in the form of electrons. The nicotinamide cofactors NAD(H) and NADP(H) are the main electron carriers fueling reductive redox reactions of the metabolic network of living cells. One way to ensure the continuous availability of reduced nicotinamide cofactors in a synthetic cell is to build a minimal enzymatic module that can oxidize an external electron donor and reduce NAD(P)+. In the diverse world of metabolism there is a plethora of potential electron donors and enzymes known from living organisms to provide reducing power to NAD(P)+ coenzymes. This perspective proposes guidelines to enable the reduction of nicotinamide cofactors enclosed in phospholipid vesicles, while avoiding high burdens of or cross-talk with other encapsulated metabolic modules. By determining key requirements, such as the feasibility of the reaction and transport of the electron donor into the cell-like compartment, we select a shortlist of potentially suitable electron donors. We review the most convenient proteins for the use of these reducing agents, highlighting their main biochemical and structural features. Noting that specificity toward either NAD(H) or NADP(H) imposes a limitation common to most of the analyzed enzymes, we discuss the need for specific enzymes─transhydrogenases─to overcome this potential bottleneck.
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Affiliation(s)
- Michele Partipilo
- Department
of Biochemistry, Groningen Institute of Biomolecular Sciences &
Biotechnology, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Nico J. Claassens
- Laboratory
of Microbiology, Wageningen University, Stippeneng 4, 6708 WE Wageningen, The Netherlands
| | - Dirk Jan Slotboom
- Department
of Biochemistry, Groningen Institute of Biomolecular Sciences &
Biotechnology, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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2
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Li G, Zhou K, Sun Q, Ma W, Liu X, Zhang X, Zhang L, Rao B, He YL, He G. Bacteria-Triggered Solar Hydrogen Production via Platinum(II)-Tethered Chalcogenoviologens. Angew Chem Int Ed Engl 2022; 61:e202115298. [PMID: 34982500 DOI: 10.1002/anie.202115298] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Indexed: 12/19/2022]
Abstract
Multifunctional solar energy conversion offers a feasible strategy to solve energy, environmental and water crises. Herein, a series of platinum(II)-tethered chalcogenoviologens (PtL+ -EV2+ , E=S, Se, Te) is reported, which integrate the functions of photosensitizer, electron mediator and catalyst. PtL+ -EV2+ (particularly for PtL+ -SeV2+ )-based one-component solar H2 production could be triggered not only by EDTA, but also by facultative anaerobic and aerobic bacteria relying on a simplified mechanism, along with efficient antibacterial activities. In addition, by using real pool water, PtL+ -SeV2+ achieved multiple functions, including H2 production, antibacterial action and acid removal, which supplied a new strategy to solve various problems in real life via a single system.
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Affiliation(s)
- Guoping Li
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, China.,Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Kun Zhou
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Qi Sun
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Wenqiang Ma
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Xu Liu
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Xuri Zhang
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Lei Zhang
- School of Physics and Optoelectronic Engineering, Xidian University, China
| | - Bin Rao
- Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
| | - Ya-Ling He
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, China
| | - Gang He
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education, School of Energy and Power Engineering, China.,Frontier Institute of Science and Technology, State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710054, China
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3
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Li G, Zhou K, Sun Q, Ma W, Liu X, Zhang X, Zhang L, Rao B, He Y, He G. Bacteria‐Triggered Solar Hydrogen Production via Platinum(II)‐Tethered Chalcogenoviologens. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Guoping Li
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power Engineering China
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Kun Zhou
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Qi Sun
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Wenqiang Ma
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Xu Liu
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Xuri Zhang
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Lei Zhang
- School of Physics and Optoelectronic Engineering Xidian University China
| | - Bin Rao
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Ya‐Ling He
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power Engineering China
| | - Gang He
- Key Laboratory of Thermo-Fluid Science and Engineering of Ministry of Education School of Energy and Power Engineering China
- Frontier Institute of Science and Technology State Key Laboratory for Strength and Vibration of Mechanical Structures Xi'an Jiaotong University Xi'an Shaanxi Province 710054 China
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4
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Zhou K, Tian R, Li G, Qiu X, Xu L, Guo M, Chigan D, Zhang Y, Chen X, He G. Cationic Chalcogenoviologen Derivatives for Photodynamic Antimicrobial Therapy and Skin Regeneration. Chemistry 2019; 25:13472-13478. [DOI: 10.1002/chem.201903278] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Kun Zhou
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Ran Tian
- School of Chemical Engineering and TechnologyShaanxi Key Laboratory of Energy Chemical Process IntensificationInstitute of Polymer Science in Chemical EngineeringXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Guoping Li
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Xinyu Qiu
- Center for Tissue Engineering, School of StomatologyFourth Military Medical University Xi'an Shaanxi Province 710032 China
| | - Letian Xu
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Mengying Guo
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Dongdong Chigan
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Yanfeng Zhang
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Xin Chen
- School of Chemical Engineering and TechnologyShaanxi Key Laboratory of Energy Chemical Process IntensificationInstitute of Polymer Science in Chemical EngineeringXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
| | - Gang He
- Frontier Institute of Science and TechnologyState Key Laboratory for Strength and Vibration of Mechanical StructuresXi'an Key Laboratory of Sustainable Energy Materials ChemistryXi'an Jiaotong University Xi'an Shaanxi Province 710054 China
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5
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Gureeva MV, Belousova EV, Dubinina GA, Novikov AA, Kopitsyn DS, Grabovich MY. Thioflexithrix psekupsensis gen. nov., sp. nov., a filamentous gliding sulfur bacterium from the family Beggiatoaceae. Int J Syst Evol Microbiol 2019; 69:798-804. [PMID: 30657444 DOI: 10.1099/ijsem.0.003240] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A sulfur-oxidizing, filamentous, gliding micro-organism, strain D3T, was isolated from a sulfidic spring in Goryachy Klyuch, Krasnodar, Russia. The cell walls were Gram-negative. The new isolate was a microaerophilic facultative anaerobe and an obligate chemolithoautotroph. The pH range for growth was pH 6.8-7.6, with an optimum at pH 7.2. The temperature range for growth was 10-46 °C, with an optimum at 32 °C. The G+C content of DNA was 42.1 mol%. Phylogenetic analysis of the 16S rRNA gene showed that strain D3T belongs to the family Beggiatoaceae, order Thiotrichales and was distantly related to the genera of the family Beggiatoaceae(86-88 % sequence similarity). The major respiratory quinone was ubiquinone-6. Major fatty acids were C18:1 ω7 (37.6 %), C16 : 0 (34.7 %) and C16: 1 ω7 (27.7 %). On the basis of its physiological properties and the results of phylogenetic analysis, strain D3T is considered to represent a novel species of a new genus, for which the name Thioflexithrix psekupsensis gen. nov., sp. nov. is proposed. The type strain is D3T (=KCTC 62399=UNIQEM U981).
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Affiliation(s)
- M V Gureeva
- 1Department of Biochemistry and Cell Physiology, Voronezh State University, Universitetskaya pl., 1, Voronezh 394018, Russia
| | - E V Belousova
- 1Department of Biochemistry and Cell Physiology, Voronezh State University, Universitetskaya pl., 1, Voronezh 394018, Russia
| | - G A Dubinina
- 2Federal State Institution 'Federal Research Centre "Fundamentals of Biotechnology" of the Russian Academy of Sciences', Prospect 60-letiya Oktyabrya, 7/2, 117312 Moscow, Russia
| | - A A Novikov
- 3Gubkin University, 65/1 Leninsky Prospekt, Moscow 119991, Russia
| | - D S Kopitsyn
- 3Gubkin University, 65/1 Leninsky Prospekt, Moscow 119991, Russia
| | - M Y Grabovich
- 1Department of Biochemistry and Cell Physiology, Voronezh State University, Universitetskaya pl., 1, Voronezh 394018, Russia
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6
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The structure of hydrogenase-2 from Escherichia coli: implications for H 2-driven proton pumping. Biochem J 2018; 475:1353-1370. [PMID: 29555844 PMCID: PMC5902676 DOI: 10.1042/bcj20180053] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/12/2018] [Accepted: 03/16/2018] [Indexed: 01/19/2023]
Abstract
Under anaerobic conditions, Escherichia coli is able to metabolize molecular hydrogen via the action of several [NiFe]-hydrogenase enzymes. Hydrogenase-2, which is typically present in cells at low levels during anaerobic respiration, is a periplasmic-facing membrane-bound complex that functions as a proton pump to convert energy from hydrogen (H2) oxidation into a proton gradient; consequently, its structure is of great interest. Empirically, the complex consists of a tightly bound core catalytic module, comprising large (HybC) and small (HybO) subunits, which is attached to an Fe–S protein (HybA) and an integral membrane protein (HybB). To date, efforts to gain a more detailed picture have been thwarted by low native expression levels of Hydrogenase-2 and the labile interaction between HybOC and HybA/HybB subunits. In the present paper, we describe a new overexpression system that has facilitated the determination of high-resolution crystal structures of HybOC and, hence, a prediction of the quaternary structure of the HybOCAB complex.
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7
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Yang Y, He P, Wang Y, Bai H, Wang S, Xu JF, Zhang X. Supramolecular Radical Anions Triggered by Bacteria In Situ for Selective Photothermal Therapy. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708971] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Yuchong Yang
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Ping He
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yunxia Wang
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Haotian Bai
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Shu Wang
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Jiang-Fei Xu
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
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8
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Yang Y, He P, Wang Y, Bai H, Wang S, Xu JF, Zhang X. Supramolecular Radical Anions Triggered by Bacteria In Situ for Selective Photothermal Therapy. Angew Chem Int Ed Engl 2017; 56:16239-16242. [DOI: 10.1002/anie.201708971] [Citation(s) in RCA: 186] [Impact Index Per Article: 26.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Yuchong Yang
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Ping He
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Yunxia Wang
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Haotian Bai
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Shu Wang
- Key Laboratory of Organic Solids; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Jiang-Fei Xu
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
| | - Xi Zhang
- Key Lab of Organic Optoelectronics and Molecular Engineering; Department of Chemistry; Tsinghua University; Beijing 100084 China
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9
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Tapia C, Milton RD, Pankratova G, Minteer SD, Åkerlund H, Leech D, De Lacey AL, Pita M, Gorton L. Wiring of Photosystem I and Hydrogenase on an Electrode for Photoelectrochemical H
2
Production by using Redox Polymers for Relatively Positive Onset Potential. ChemElectroChem 2016. [DOI: 10.1002/celc.201600506] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Cristina Tapia
- Instituto de Catalisis y Petroleoquimica CSIC, C/ Marie Curie 2, L10 28049 Madrid Spain
| | - Ross D. Milton
- Department of Chemistry University of Utah 315 S 1400 E Rm 2020 Salt Lake City Utah USA
- School of Chemistry National University of Ireland Galway University Road Galway Ireland
| | - Galina Pankratova
- Department of Biochemistry and Structural Biology Lund University P.O.Box 124 22100 Lund Sweden
| | - Shelley D. Minteer
- Department of Chemistry University of Utah 315 S 1400 E Rm 2020 Salt Lake City Utah USA
| | - Hans‐Erik Åkerlund
- Department of Biochemistry and Structural Biology Lund University P.O.Box 124 22100 Lund Sweden
| | - Dónal Leech
- School of Chemistry National University of Ireland Galway University Road Galway Ireland
| | - Antonio L. De Lacey
- Instituto de Catalisis y Petroleoquimica CSIC, C/ Marie Curie 2, L10 28049 Madrid Spain
| | - Marcos Pita
- Instituto de Catalisis y Petroleoquimica CSIC, C/ Marie Curie 2, L10 28049 Madrid Spain
| | - Lo Gorton
- Department of Biochemistry and Structural Biology Lund University P.O.Box 124 22100 Lund Sweden
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Schilter D, Camara JM, Huynh MT, Hammes-Schiffer S, Rauchfuss TB. Hydrogenase Enzymes and Their Synthetic Models: The Role of Metal Hydrides. Chem Rev 2016; 116:8693-749. [PMID: 27353631 PMCID: PMC5026416 DOI: 10.1021/acs.chemrev.6b00180] [Citation(s) in RCA: 397] [Impact Index Per Article: 49.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogenase enzymes efficiently process H2 and protons at organometallic FeFe, NiFe, or Fe active sites. Synthetic modeling of the many H2ase states has provided insight into H2ase structure and mechanism, as well as afforded catalysts for the H2 energy vector. Particularly important are hydride-bearing states, with synthetic hydride analogues now known for each hydrogenase class. These hydrides are typically prepared by protonation of low-valent cores. Examples of FeFe and NiFe hydrides derived from H2 have also been prepared. Such chemistry is more developed than mimicry of the redox-inactive monoFe enzyme, although functional models of the latter are now emerging. Advances in physical and theoretical characterization of H2ase enzymes and synthetic models have proven key to the study of hydrides in particular, and will guide modeling efforts toward more robust and active species optimized for practical applications.
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Affiliation(s)
- David Schilter
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - James M. Camara
- Department of Chemistry, Yeshiva University, 500 West 185th Street, New York, New York 10033, United States
| | - Mioy T. Huynh
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Sharon Hammes-Schiffer
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- Department of Chemistry, University of Illinois at Urbana–Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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11
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Gu W, Wang H, Wang K. Nickel L-edge and K-edge X-ray absorption spectroscopy of non-innocent Ni[S₂C₂(CF₃)₂]₂(n) series (n = -2, -1, 0): direct probe of nickel fractional oxidation state changes. Dalton Trans 2014; 43:6406-13. [PMID: 24604143 DOI: 10.1039/c4dt00308j] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of nickel dithiolene complexes Ni[S2C2(CF3)2]2(n) (n = -2, -1, 0) has been investigated using Ni L- and K-edge X-ray absorption spectroscopy (XAS). The L3 centroid shifts about 0.3 eV for a change of one unit in the formal oxidation state (or 0.3 eV per oxi), corresponding to ~33% of the shift for Ni oxides or fluorides (about 0.9 eV per oxi). The K-edge XAS edge position shifts about 0.7 eV per oxi, corresponding to ~38% of that for Ni oxides (1.85 eV per oxi). In addition, Ni L sum rule analysis found the Ni(3d) ionicity in the frontier orbitals being 50.5%, 44.0% and 38.5% respectively (for n = -2, -1, 0), in comparison with their formal oxidation states (of Ni(II), Ni(III), and Ni(IV)). For the first time, direct and quantitative measurement of the Ni fractional oxidation state changes becomes possible for Ni dithiolene complexes, illustrating the power of L-edge XAS and L sum rule analysis in such a study. The Ni L-edge and K-edge XAS can be used in a complementary manner to better assess the oxidation states for Ni.
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Affiliation(s)
- Weiwei Gu
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
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Affiliation(s)
- Wolfgang Lubitz
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Hideaki Ogata
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Olaf Rüdiger
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Edward Reijerse
- Max Planck Institute for Chemical Energy Conversion, Stiftstr. 34-36, 45470 Mülheim an der Ruhr, Germany
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13
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Reardon CL, Magnuson TS, Boyd ES, Leavitt WD, Reed DW, Geesey GG. Hydrogenase activity of mineral-associated and suspended populations of Desulfovibrio desulfuricans Essex 6. MICROBIAL ECOLOGY 2014; 67:318-326. [PMID: 24194097 DOI: 10.1007/s00248-013-0308-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 10/02/2013] [Indexed: 06/02/2023]
Abstract
The interactions between sulfate-reducing microorganisms and iron oxides influence a number of important redox-sensitive biogeochemical processes including the formation of iron sulfides. Enzymes, such as hydrogenase which catalyze the reversible oxidation of molecular hydrogen, are known to mediate electron transfer to metals and may contribute to the formation and speciation of ferrous sulfides formed at the cell-mineral interface. In the present study, we compared the whole cell hydrogenase activity of Desulfovibrio desulfuricans strain Essex 6 growing as biofilms on hematite (hematite-associated) or as suspended populations using different metabolic pathways. Hematite-associated cells exhibited significantly greater hydrogenase activity than suspended populations during sulfate respiration but not during pyruvate fermentation. The enhanced activity of the hematite-associated, sulfate-grown cells appears to be dependent on iron availability rather than a general response to surface attachment since the activity of glass-associated cells did not differ from that of suspended populations. Hydrogenase activity of pyruvate-fermenting cells was stimulated by addition of iron as soluble Fe(II)Cl2 and, in the absence of added iron, both sulfate-reducing and pyruvate-fermenting cells displayed similar rates of hydrogenase activity. These data suggest that iron exerts a stronger influence on whole cell hydrogenase activity than either metabolic pathway or mode of growth. The location of hydrogenase to the cell envelope and the enhanced activity at the hematite surface in sulfate-reducing cells may influence the redox conditions that control the species of iron sulfides on the mineral surface.
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Affiliation(s)
- C L Reardon
- Columbia Plateau Conservation Research Center, USDA Agricultural Research Service, Adams, OR, 97810, USA,
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14
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Yurkiw MA, Voordouw J, Voordouw G. Contribution of rubredoxin:oxygen oxidoreductases and hybrid cluster proteins of Desulfovibrio vulgaris Hildenborough to survival under oxygen and nitrite stress. Environ Microbiol 2012; 14:2711-25. [PMID: 22947039 DOI: 10.1111/j.1462-2920.2012.02859.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 07/24/2012] [Accepted: 07/26/2012] [Indexed: 11/28/2022]
Abstract
A genomic island (GEI) of the sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough, found to be able to migrate between two tRNA-Met loci of the genome, contains genes for rubredoxin:oxygen oxidoreductase-1 (roo1) and hybrid cluster protein-1 (hcp1) with additional copies for these genes (roo2 and hcp2) being found elsewhere on the chromosome. A suite of mutants was created in which roo2 and/or hcp2 and/or the GEI were either present or missing. The GEI and roo2 increased survival under microaerobic conditions and allowed growth in closer proximity to the air-water interface of soft agar tubes, two properties which appeared to be closely linked. When Hcp2(+) GEI(+) or Hcp2(-) GEI(+) cells, harbouring cytochrome c nitrite reductase (NrfHA) and growing on lactate and sulfate, were amended with 10 mM nitrite at mid-log phase (8-10 mM sulfide), all nitrite was reduced within 30 h with a rate of 3.0 mmol (g biomass)(-1) h(-1) after which sulfate reduction resumed. However, Hcp2(+) GEI(-) or Hcp2(-) GEI(-) cells were unable to use lactate, causing sulfide to be used as electron donor for nitrite reduction at a sixfold lower rate. Complementation studies indicated that hcp1, not roo1, enhanced the rate of nitrite reduction under these conditions. Hcp2 enhanced the rate of nitrite reduction when, in addition to lactate, hydrogen was also present as an electron donor. These results indicate a critical role of Hcps in alleviating nitrite stress in D. vulgaris Hildenborough by maintaining the integrity of electron transport chains from lactate or H(2) to NrfHA through removal of reactive nitrogen species. It thus appears that the GEI contributes considerably to the fitness of the organism, allowing improved growth in microaerobic environments found in sulfide-oxygen gradients and in environments, containing both sulfide and nitrite, through the action of Roo1 and Hcp1 respectively.
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Affiliation(s)
- Marcy A Yurkiw
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada, T2N 1N4
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Pandelia ME, Lubitz W, Nitschke W. Evolution and diversification of Group 1 [NiFe] hydrogenases. Is there a phylogenetic marker for O2-tolerance? BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2012; 1817:1565-75. [DOI: 10.1016/j.bbabio.2012.04.012] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2012] [Revised: 04/21/2012] [Accepted: 04/24/2012] [Indexed: 10/28/2022]
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16
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Fritsch J, Löscher S, Sanganas O, Siebert E, Zebger I, Stein M, Ludwig M, De Lacey AL, Dau H, Friedrich B, Lenz O, Haumann M. [NiFe] and [FeS] Cofactors in the Membrane-Bound Hydrogenase of Ralstonia eutropha Investigated by X-ray Absorption Spectroscopy: Insights into O2-Tolerant H2 Cleavage. Biochemistry 2011; 50:5858-69. [DOI: 10.1021/bi200367u] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Johannes Fritsch
- Humboldt-Universität zu Berlin, Institut für Biologie/Mikrobiologie, 10115 Berlin, Germany
| | - Simone Löscher
- Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany
| | - Oliver Sanganas
- Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany
| | - Elisabeth Siebert
- Technische Universität Berlin, Max-Volmer Institut, 10623 Berlin, Germany
| | - Ingo Zebger
- Technische Universität Berlin, Max-Volmer Institut, 10623 Berlin, Germany
| | - Matthias Stein
- Max-Planck-Institut für Dynamik komplexer technischer Systeme, 39106 Magdeburg, Germany
| | - Marcus Ludwig
- Humboldt-Universität zu Berlin, Institut für Biologie/Mikrobiologie, 10115 Berlin, Germany
| | | | - Holger Dau
- Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany
| | - Bärbel Friedrich
- Humboldt-Universität zu Berlin, Institut für Biologie/Mikrobiologie, 10115 Berlin, Germany
| | - Oliver Lenz
- Humboldt-Universität zu Berlin, Institut für Biologie/Mikrobiologie, 10115 Berlin, Germany
| | - Michael Haumann
- Freie Universität Berlin, Institut für Experimentalphysik, 14195 Berlin, Germany
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Rüdiger O, Gutiérrez-Sánchez C, Olea D, Pereira I, Vélez M, Fernández V, De Lacey A. Enzymatic Anodes for Hydrogen Fuel Cells based on Covalent Attachment of Ni-Fe Hydrogenases and Direct Electron Transfer to SAM-Modified Gold Electrodes. ELECTROANAL 2010. [DOI: 10.1002/elan.200880002] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Wan Y, Zhang D, Liu H, Li Y, Hou B. Influence of sulphate-reducing bacteria on environmental parameters and marine corrosion behavior of Q235 steel in aerobic conditions. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.10.009] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Millo D, Pandelia ME, Utesch T, Wisitruangsakul N, Mroginski MA, Lubitz W, Hildebrandt P, Zebger I. Spectroelectrochemical Study of the [NiFe] Hydrogenase from Desulfovibrio vulgaris Miyazaki F in Solution and Immobilized on Biocompatible Gold Surfaces. J Phys Chem B 2009; 113:15344-51. [DOI: 10.1021/jp906575r] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Diego Millo
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Maria-Eirini Pandelia
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Tillmann Utesch
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Nattawadee Wisitruangsakul
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Maria A. Mroginski
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Wolfgang Lubitz
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Peter Hildebrandt
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
| | - Ingo Zebger
- Institut für Chemie, Technische Universität Berlin, Str. des 17. Juni 135, Sekr. PC14, D-10623 Berlin, Germany, and Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34−36, D-45470 Mülheim/Ruhr, Germany
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20
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Presence and expression of terminal oxygen reductases in strictly anaerobic sulfate-reducing bacteria isolated from salt-marsh sediments. Anaerobe 2008; 14:145-56. [DOI: 10.1016/j.anaerobe.2008.03.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2007] [Revised: 03/08/2008] [Accepted: 03/14/2008] [Indexed: 11/23/2022]
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21
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Zumárraga M, Camarero S, Shleev S, Martínez-Arias A, Ballesteros A, Plou FJ, Alcalde M. Altering the laccase functionality byin vivo assembly of mutant libraries with different mutational spectra. Proteins 2008; 71:250-60. [DOI: 10.1002/prot.21699] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Baran P, Boca R, Chakraborty I, Giapintzakis J, Herchel R, Huang Q, McGrady JE, Raptis RG, Sanakis YO, Simopouloso A. Synthesis, characterization, and study of octanuclear iron-oxo clusters containing a redox-active Fe4O4-cubane core. Inorg Chem 2007; 47:645-55. [PMID: 18078337 DOI: 10.1021/ic7020337] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A one-pot synthetic procedure yields the octanuclear Fe(III) complexes Fe(8)(micro(4-)O)(4)(micro-pz(*))(12)X(40, where X = Cl and pz(*) = pyrazolate anion (pz = C(3)H(3)N(2)-) (1), 4-Cl-pz (2), and 4-Me-pz (3) or X = Br and pz(*) = pz (4). The crystal structures of complexes 1-4, determined by X-ray diffraction, show an Fe(4)O(4)-cubane core encapsulated in a shell composed of four interwoven Fe(micro-pz(*))(3)X units. Complexes 1-4 have been characterized by 1H NMR, infrared, and Raman spectroscopies. Mössbauer spectroscopic analysis distinguishes the cubane and outer Fe(III) centers by their different isomer shift and quadrupole splitting values. Electrochemical analyses by cyclic voltammetry show four consecutive, closely spaced, reversible reduction processes for each of the four complexes. Magnetic susceptibility studies, corroborated by density functional theory calculations, reveal weak antiferromagnetic coupling among the four cubane Fe centers and strong antiferromagnetic coupling between cubane and outer Fe atoms of 1. The structural similarity between the antiferromagnetic Fe(8)(micro(4-)O)(4) core of 1-4 and the antiferromagnetic units contained in the minerals ferrihydrite and maghemite is demonstrated by X-ray and Mössbauer data.
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Affiliation(s)
- Peter Baran
- Department of Chemistry and the Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, Puerto Rico 00931-3346, USA
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23
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Fontecilla-Camps JC, Volbeda A, Cavazza C, Nicolet Y. Structure/function relationships of [NiFe]- and [FeFe]-hydrogenases. Chem Rev 2007; 107:4273-303. [PMID: 17850165 DOI: 10.1021/cr050195z] [Citation(s) in RCA: 1004] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Juan C Fontecilla-Camps
- Laboratoire de Cristallographie et Cristallogenèse des Proteines, Institut de Biologie Structurale J. P. Ebel, CEA, CNRS, Universitè Joseph Fourier, 41 rue J. Horowitz, 38027 Grenoble Cedex 1, France.
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24
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Vincent KA, Parkin A, Armstrong FA. Investigating and Exploiting the Electrocatalytic Properties of Hydrogenases. Chem Rev 2007; 107:4366-413. [PMID: 17845060 DOI: 10.1021/cr050191u] [Citation(s) in RCA: 554] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kylie A Vincent
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
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25
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Lubitz W, Reijerse E, van Gastel M. [NiFe] and [FeFe] Hydrogenases Studied by Advanced Magnetic Resonance Techniques. Chem Rev 2007; 107:4331-65. [PMID: 17845059 DOI: 10.1021/cr050186q] [Citation(s) in RCA: 376] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wolfgang Lubitz
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D-45470 Mülheim an der Ruhr, Germany
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26
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Dolla A, Fournier M, Dermoun Z. Oxygen defense in sulfate-reducing bacteria. J Biotechnol 2006; 126:87-100. [PMID: 16713001 DOI: 10.1016/j.jbiotec.2006.03.041] [Citation(s) in RCA: 140] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2005] [Revised: 02/27/2006] [Accepted: 03/29/2006] [Indexed: 11/24/2022]
Abstract
Sulfate-reducing bacteria (SRB) are strict anaerobes that are often found in biotopes where oxic conditions can temporarily exist. The bacteria have developed several defense strategies in order to survive exposure to oxygen. These strategies includes peculiar behaviors in the presence of oxygen, like aggregation or aerotaxis, and enzymatic systems dedicated to the reduction and the elimination of oxygen and its reactive species. Sulfate-reducing bacteria, and specially Desulfovibrio species, possess a variety of enzymes acting together to achieve an efficient defense against oxidative stress. The function and occurrence of these enzymatic systems are described.
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Affiliation(s)
- Alain Dolla
- Laboratoire de Bioénergétique et Ingénierie des Protéines, CNRS - 31 chemin Joseph Aiguier, 13402 Marseille cedex 20, France.
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27
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Kutty R, Bennett GN. Studies on inhibition of transformation of 2,4,6-trinitrotoluene catalyzed by Fe-only hydrogenase from Clostridium acetobutylicum. J Ind Microbiol Biotechnol 2006; 33:368-76. [PMID: 16550436 DOI: 10.1007/s10295-005-0067-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Accepted: 12/03/2005] [Indexed: 10/25/2022]
Abstract
The major enzyme in Clostridium acetobutylicum ATCC 824 leading to transformation of TNT has been reported to be the Fe-only hydrogenase. In this study, we examine the effect of inhibitors of hydrogenase on TNT reduction by Clostridial extracts. These experiments further demonstrate the major role of hydrogenase in TNT transformation. The C. acetobutylicum hydrogenase is closely related to that of C. pasteurianum; and can be fitted to the X-ray crystal structure with a root mean square deviation of 1.18 angstroms for the Calpha atoms of the generated 3D simulation model. The Hyd1, Hyd2, and Hyd3 antibodies generated against hydrogenase reacted with both the hydrogenase in cell extracts and with C. acetobutylicum hydrogenase expressed in Escherichia coli. Inhibition studies using antibodies against Fe-only hydrogenase from C. acetobutylicum indicated that the transformation of TNT by crude cell extracts was completely inhibited by Hyd2 antibody (to amino acid 415-428) whereas antibodies Hyd1 (to residues 1-16) and Hyd3 (to amino acid 424-448) inhibited less effectively. The TNT transforming activity of the cell extract was retained when Hyd2 antibody pretreated with purified but enzymatically inactive recombinant hydrogenase was added to the extract. Addition of the transition metal Cu2+ to extracts completely inhibited the transformation of TNT suggesting the destruction of [4Fe-4S] centers which are essential for transfer of electrons from the H2-activating site to TNT. Growth of C. acetobutylicum was also inhibited by 0.5 mM Cu2+ and Hg2+ ions. The triazine dye, procion red and the nitroimidazole drug, metronidazole inhibit TNT reduction. The inhibition studies using antibodies, procion red, metronidazole, and transition metals suggest that different portions of hydrogenase are required for effective TNT reduction.
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Affiliation(s)
- Razia Kutty
- Department of Biochemistry and Cell Biology MS-140, Rice University, Houston, TX 77005-1892, USA
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28
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Maróti G, Fodor BD, Rákhely G, Kovács AT, Arvani S, Kovács KL. Accessory proteins functioning selectively and pleiotropically in the biosynthesis of [NiFe] hydrogenases in Thiocapsa roseopersicina. EUROPEAN JOURNAL OF BIOCHEMISTRY 2003; 270:2218-27. [PMID: 12752441 DOI: 10.1046/j.1432-1033.2003.03589.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
There are at least two membrane-bound (HynSL and HupSL) and one soluble (HoxEFUYH) [NiFe] hydrogenases in Thiocapsa roseopersicina BBS, a purple sulfur photosynthetic bacterium. Genes coding for accessory proteins that participate in the biosynthesis and maturation of hydrogenases seem to be scattered along the chromosome. Transposon-based mutagenesis was used to locate the hydrogenase accessory genes. Molecular analysis of strains showing mutant phenotypes led to the identification of hupK (hoxV ), hypC1, hypC2, hypD, hypE, and hynD genes. The roles of hynD, hupK and the two hypC genes were investigated in detail. The putative HynD was found to be a hydrogenase-specific endoprotease type protein, participating in the maturation of the HynSL enzyme. HupK plays an important role in the formation of the functionally active membrane-bound [NiFe] hydrogenases, but not in the biosynthesis of the soluble enzyme. In-frame deletion mutagenesis showed that HypC proteins were not specific for the maturation of either hydrogenase enzyme. The lack of either HypC protein drastically reduced the activity of every hydrogenase. Hence both HypCs might participate in the maturation of [NiFe] hydrogenases. Homologous complementation with the appropriate genes substantiated the physiological roles of the corresponding gene products in the H2 metabolism of T. roseopersicina.
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Affiliation(s)
- Gergely Maróti
- Institute of Biophysics, Biological Research Center, Hungarian Academy of Sciences, Hungary
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29
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Volbeda A, Fontecilla-Camps JC. The active site and catalytic mechanism of NiFe hydrogenases. Dalton Trans 2003. [DOI: 10.1039/b304316a] [Citation(s) in RCA: 114] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Andrade SL, Moura JJ. Hydrogen evolution and consumption in AOT–isooctane reverse micelles by Desulfovibrio gigas hydrogenase. Enzyme Microb Technol 2002. [DOI: 10.1016/s0141-0229(02)00076-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Fodor B, Rákhely G, Kovács KL. Transposon mutagenesis in purple sulfur photosynthetic bacteria: identification of hypF, encoding a protein capable of processing [NiFe] hydrogenases in alpha, beta, and gamma subdivisions of the proteobacteria. Appl Environ Microbiol 2001; 67:2476-83. [PMID: 11375153 PMCID: PMC92897 DOI: 10.1128/aem.67.6.2476-2483.2001] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A random transposon-based mutagenesis system was optimized for the purple sulfur phototrophic bacterium Thiocapsa roseopersicina BBS. Screening for hydrogenase-deficient phenotypes resulted in the isolation of six independent mutants in a mini-Tn5 library. One of the mutations was in a gene showing high amino acid sequence similarity to HypF proteins in other organisms. Inactivation of hydrogen uptake activity in the hypF-deficient mutant resulted in a dramatic increase in the hydrogen evolution capacity of T. roseopersicina under nitrogen-fixing conditions. This mutant is therefore a promising candidate for use in practical biohydrogen-producing systems. The reconstructed hypF gene was able to complement the hypF-deficient mutant of T. roseopersicina BBS. Heterologous complementation experiments, using hypF mutant strains of T. roseopersicina, Escherichia coli, and Ralstonia eutropha and various hypF genes, were performed. They were successful in all of the cases tested, although for E. coli, the regulatory region of the foreign gene had to be replaced in order to achieve partial complementation. RT-PCR data suggested that HypF has no effect on the transcriptional regulation of the structural genes of hydrogenases in this organism.
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Affiliation(s)
- B Fodor
- Institute of Biophysics, Biological Research Center, Hungarian Academy of Sciences, and Department of Biotechnology, University of Szeged, H-6726 Szeged, Hungary
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32
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Bingemann R, Klein A. Conversion of the central [4Fe-4S] cluster into a [3Fe-4S] cluster leads to reduced hydrogen-uptake activity of the F420-reducing hydrogenase of Methanococcus voltae. EUROPEAN JOURNAL OF BIOCHEMISTRY 2000; 267:6612-8. [PMID: 11054113 DOI: 10.1046/j.1432-1327.2000.01755.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
As in many other hydrogenases, the small subunit of the F420-reducing hydrogenase of Methanococcus voltae contains three iron-sulfur clusters. The arrangement of the three [4Fe-4S] clusters corresponds to the arrangement of [Fe-S] clusters in the [NiFeSe] hydrogenase of Desulfomicrobium baculatum. Many other hydrogenases contain two [4Fe-4S] clusters and one [3Fe-4S] cluster with a relatively high redox potential, which is located in the central position between a proximal and a distal [4Fe-4S] cluster. We have investigated the role of the central [4Fe-4S] cluster in M. voltae with regard to its effect on the enzyme activity and its spectroscopic properties. Using site-directed mutagenesis, we constructed a strain in which one cysteine ligand of the central [4Fe-4S] cluster was replaced by proline. The mutant protein was purified, and the [4Fe-4S] to [3Fe-4S] cluster conversion was confirmed by EPR spectroscopy. The conversion resulted in an increase in the redox potential of the [3Fe-4S] cluster by about 400 mV. The [NiFe] active site was not affected significantly by the mutation as assessed by the unchanged Ni EPR spectrum. The specific activity of the mutated enzyme did not show any significant differences with the artificial electron acceptor benzyl viologen, but its specific activity with the natural electron acceptor F420 decreased tenfold.
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Affiliation(s)
- R Bingemann
- Genetics, Department of Biology, Philipps-University, Marburg, Germany
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33
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De Lacey AL, Santamaria E, Hatchikian EC, Fernandez VM. Kinetic characterization of Desulfovibrio gigas hydrogenase upon selective chemical modification of amino acid groups as a tool for structure-function relationships. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1481:371-80. [PMID: 11018729 DOI: 10.1016/s0167-4838(00)00180-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of amino acid residues modification of Desulfovibrio gigas hydrogenase on different activity assays is reported. The first method consisted in the modification of glutamic and aspartic acid residues of the enzyme with ethylenediamine in order to change the polarity of certain regions of the protein surface. The second method consisted in the modification of histidine residues with a Ru complex in order to change the acid-base properties of the histidine residues. The implication of these modifications in the enzyme kinetics has been studied by measuring in parallel the activities of para/ortho hydrogen conversion, deuterium/hydrogen exchange and dyes reduction with hydrogen. Our experimental data support some hypothesis based on the three-dimensional structure of this enzyme: (a) electrostactic interactions between the hydrogenase and the redox partner play an essential role in the kinetics; (b) the histidine ligand and the surrounding acidic residues of the distal [4Fe4S] cluster form the recognition site of the redox partner of the hydrogenase; and (c) histidine residues are involved in the hydron transfer pathway of the hydrogenase.
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Affiliation(s)
- A L De Lacey
- Instituto de Catálisis, C.S.I.C., Campus Universidad Autónoma-Cantoblanco, Madrid, Spain.
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34
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De Lacey AL, Detcheverry M, Moiroux J, Bourdillon C. Construction of multicomponent catalytic films based on avidin-biotin technology for the electroenzymatic oxidation of molecular hydrogen. Biotechnol Bioeng 2000. [DOI: 10.1002/(sici)1097-0290(20000405)68:1%3c1::aid-bit1%3e3.0.co;2-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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De Lacey AL, Detcheverry M, Moiroux J, Bourdillon C. Construction of multicomponent catalytic films based on avidin-biotin technology for the electroenzymatic oxidation of molecular hydrogen. Biotechnol Bioeng 2000; 68:1-10. [PMID: 10699866 DOI: 10.1002/(sici)1097-0290(20000405)68:1<1::aid-bit1>3.0.co;2-a] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Two methods based on the avidin-biotin technology were developed for the multimonolayer immobilization of Desulfovibrio gigas hydrogenase on glassy carbon or gold electrodes. In both methods the molecular structure of the modified interface was the result of a step-by-step process. The first method alternates monolayers of avidin and biotinylated hydrogenase, the mediator (methyl viologen) being free to diffuse in the structure. In the second method, the avidin monolayers were used to immobilize both the biotinylated enzyme and a long-chain biotinylated viologen derivative. The viologen head of this hydrophilic arm shuttles the electrons between the electrode and the enzyme. The modified electrodes were evaluated for the electroenzymatic oxidation of molecular hydrogen, which has interest for the development of enzymatic fuel cells. The parameters that affect the current density of mediated oxidation of H(2) at the modified electrodes was studied. The second structure, which has given typical catalytic currents of 25 microA per cm(2) for 10 monolayers, was found clearly less efficient than the first structure (500 microA per cm(2) for 10 monolayers). In both methods the catalytic currents increased linearly with the number of monolayers of hydrogenase immobilized, which indicates that the multilayer structures are spatially ordered.
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Affiliation(s)
- A L De Lacey
- Laboratoire de Technologie Enzymatique, Unité associée au CNRS No. 6022, Université de Technologie de Compiègne, B.P. 20529, 60205 Compiègne Cedex, France
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36
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Brugna M, Nitschke W, Toci R, Bruschi M, Giudici-Orticoni MT. First evidence for the presence of a hydrogenase in the sulfur-reducing bacterium Desulfuromonas acetoxidans. J Bacteriol 1999; 181:5505-8. [PMID: 10464227 PMCID: PMC94062 DOI: 10.1128/jb.181.17.5505-5508.1999] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/1999] [Accepted: 06/22/1999] [Indexed: 11/20/2022] Open
Abstract
Hydrogenases, which are ubiquitous in sulfate-reducing bacteria, were previously thought to be absent from Desulfuromonas acetoxidans. For the first time, a hydrogenase from the strict anaerobic sulfur-respiring bacterium D. acetoxidans, grown on ethanol-malate, was detected and enriched. To assay the role of the hydrogenase in the energetic metabolism of D. acetoxidans, we examined the reactivity of the enzyme with polyheme cytochromes from the same bacterium.
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Affiliation(s)
- M Brugna
- Laboratoire de Bioénergétique et Ingénierie des Protéines, UPR 9036 CNRS, Institut de Biologie Structurale et Microbiologie, 13402 Marseille Cedex 20, France
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37
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Simple and Complex Iron-Sulfur Proteins in Sulfate Reducing Bacteria. ADVANCES IN INORGANIC CHEMISTRY 1999. [DOI: 10.1016/s0898-8838(08)60083-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Brugna M, Giudici-Orticoni M, Spinelli S, Brown K, Tegoni M, Bruschi M. Kinetics and interaction studies between cytochrome c3 and Fe-only hydrogenase fromDesulfovibrio vulgaris hildenborough. Proteins 1998. [DOI: 10.1002/(sici)1097-0134(19981201)33:4<590::aid-prot11>3.0.co;2-i] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Wang H, Ge P, Riordan CG, Brooker S, Woomer CG, Collins T, Melendres CA, Graudejus O, Bartlett N, Cramer SP. Integrated X-ray L Absorption Spectra. Counting Holes in Ni Complexes. J Phys Chem B 1998. [DOI: 10.1021/jp9821026] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongxin Wang
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - Pinghua Ge
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - C. G. Riordan
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - S. Brooker
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - C. G. Woomer
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - T. Collins
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - C. A. Melendres
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - O. Graudejus
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - N. Bartlett
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
| | - S. P. Cramer
- Department of Applied Science, University of California, Davis, California 95616, Structural Biology Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, Department of Chemistry, University of Otago, P.O. Box 56, Dunedin, New Zealand, Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, Materials Science and Chemical Technology Division, Argonne National
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Massanz C, Schmidt S, Friedrich B. Subforms and in vitro reconstitution of the NAD-reducing hydrogenase of Alcaligenes eutrophus. J Bacteriol 1998; 180:1023-9. [PMID: 9495738 PMCID: PMC106987 DOI: 10.1128/jb.180.5.1023-1029.1998] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The cytoplasmic, NAD-reducing hydrogenase (SH) of Alcaligenes eutrophus H16 is a heterotetrameric enzyme which contains several cofactors and undergoes a complex maturation during biogenesis. HoxH is the Ni-carrying subunit, and together with HoxY it forms the hydrogenase dimer. HoxF and HoxU represent the flavin-containing diaphorase moiety, which is closely related to NADH:ubiquinone oxidoreductase and mediates NADH oxidation. A variety of mutations were introduced into the four SH structural genes to obtain mutant enzymes composed of monomeric and dimeric forms. A deletion removing most of hoxF, hoxU, and hoxY led to the expression of a HoxH monomer derivative which was proteolytically processed at the C terminus like the wild-type polypeptide. While the hydrogenase dimer, produced by a strain deleted of hoxF and hoxU, displayed H2-dependent dye-reducing activity, the monomeric form did not mediate the activation of H2, although nickel was incorporated into HoxH. Deletion of hoxH and hoxY led to the production of HoxFU dimers which displayed NADH:oxidoreductase activity. Mixing the hydrogenase and the diaphorase moieties in vitro reconstituted the structure and catalytic function of the SH holoenzyme.
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Affiliation(s)
- C Massanz
- Institut für Biologie, Humboldt-Universität zu Berlin, Germany
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Magro V, Pieulle L, Forget N, Guigliarelli B, Petillot Y, Hatchikian EC. Further characterization of the two tetraheme cytochromes c3 from Desulfovibiro africanus: nucleotide sequences, EPR spectroscopy and biological activity. BIOCHIMICA ET BIOPHYSICA ACTA 1997; 1342:149-63. [PMID: 9392524 DOI: 10.1016/s0167-4838(97)00096-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The genes encoding the basic and acidic tetraheme cytochromes c3 from Desulfovibrio africanus have been sequenced. The corresponding amino acid sequences of the basic and acidic cytochromes c3 indicate that the mature proteins consist of a single polypeptide chain of 117 and 103 residues, respectively. Their molecular masses, 15102 and 13742 Da, respectively, determined by mass spectrometry, are in perfect agreement with those calculated from their amino acid sequences. Both D. africanus cytochromes c3 are synthesized as precursor proteins with signal peptides of 23 and 24 residues for the basic and acidic cytochromes, respectively. These cytochromes c3 exhibit the main structural features of the cytochrome c3 family and contain the 16 strictly conserved cysteine + histidine residues directly involved in the heme binding sites. The D. africanus acidic cytochrome c3 differs from all the other homologous cytochromes by its low content of basic residues and its distribution of charged residues in the amino acid sequence. The presence of four hemes per molecule was confirmed by EPR spectroscopy in both cytochromes c3. The g-value analysis suggests that in both cytochromes, the angle between imidazole planes of the axial histidine ligands is close to 90 degrees for one heme and much lower for the three others. Moreover, an unusually high exchange interaction (approximately 10[-2] cm[-1]) was evidenced between the highest potential heme (-90 mV) and one of the low potential hemes in the basic cytochrome c3. The reactivity of D. africanus cytochromes c3 with heterologous [NiFe] and [Fe] hydrogenases was investigated. Only the basic one interacts with the two types of hydrogenase to achieve efficient electron transfer, whereas the acidic cytochrome c3 exchanges electrons specifically with the basic cytochrome c3. The difference in the specificity of the two D. africanus cytochromes c3 has been correlated with their highly different content of basic and acidic residues.
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Affiliation(s)
- V Magro
- Unité de Bioénergétique et Ingénierie des protéines, Institut de Biologie Structurale et Microbiologie, CNRS, Marseille, France
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Massanz C, Fernandez VM, Friedrich B. C-terminal extension of the H2-activating subunit, HoxH, directs maturation of the NAD-reducing hydrogenase in Alcaligenes eutrophus. EUROPEAN JOURNAL OF BIOCHEMISTRY 1997; 245:441-8. [PMID: 9151977 DOI: 10.1111/j.1432-1033.1997.t01-3-00441.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Formation of enzymatically active [NiFe] hydrogenases is dependent on a number of posttranslational steps, including metal attachment to a precursor of the catalytic subunit, truncation of a small C-terminal peptide from the precursor, and oligomerisation of the subunits. Two amino acid replacements were introduced by site-directed mutagenesis at the C-terminal proteolytic cleavage site of HoxH, the Ni-containing subunit of the cytoplasmic NAD-reducing hydrogenase of Alcaligenes eutrophus H16. Replacement of Ala465, the first residue of the 24-amino-acid cleaved polypeptide, by Pro yielded a form of HoxH that was blocked in C-terminal proteolysis. This HoxH subunit, although capable of binding Ni, was blocked in formation of a stable tetrameric holoenzyme. In the second mutant, the C-terminal extension of HoxH was eliminated by substituting the Ala codon for a translational stop codon. Although this mutant subunit was able to form the oligomeric holoenzyme, it was devoid of Ni. Both mutant proteins contained only traces of H2-activating functions. H2-dependent reduction of NAD and benzylviologen, and D2/H+-exchange activity were almost completely abolished, while the NADH oxidoreductase activity, mediated by the diaphorase moiety of the hydrogenase, was retained. These results allow the following conclusions: the C-terminal extension of HoxH is neccessary to direct specific Ni insertion into the hydrogenase; subunit assembly to the holoenzyme is not dependent on Ni insertion; and a precursor with the C-terminal peptide is not competent for assembly.
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Affiliation(s)
- C Massanz
- Institut für Biologie der Humboldt-Universitat zu Berlin, Germany
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Zorin NA, Dimon B, Gagnon J, Gaillard J, Carrier P, Vignais PM. Inhibition by iodoacetamide and acetylene of the H-D-exchange reaction catalyzed by Thiocapsa roseopersicina hydrogenase. EUROPEAN JOURNAL OF BIOCHEMISTRY 1996; 241:675-81. [PMID: 8917471 DOI: 10.1111/j.1432-1033.1996.00675.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The kinetics of H-D isotope exchange catalyzed by the thermostable hydrogenase from Thiocapsa roseopersicina have been studied by analysis of the exchange between D2 and H2O. The pH dependence of the exchange reaction was examined between pH 2.5 and pH 11. Over the whole pH range, HD was produced at a higher initial velocity than H2, with a marked optimum at pH 5.5; a second peak in the pH profile was observed at around pH 8.5. The rapid formation of H2 with respect to HD in the D2/H2O system is consistent with a heterolytic cleavage of D2 into D+ and an enzyme hydride that can both exchange with the solvent. The H-D-exchange activity was lower in the H2/D2O system than in the D2/H2O system. The other reactions catalyzed by the hydrogenase, H2 oxidation and H2 evolution, are pH dependent; the optimal pH were 9.5 for H2 uptake and 4.0 for H2 production. Treatment of the active form of hydrogenase by iodoacetamide led to a slow and irreversible inhibition of the H-D exchange. When iodo[1-14C]acetamide was incubated with hydrogenase, the radioactive labeling of the large subunit was higher for the enzyme activated under H2 than for the inactive oxidized form. Cysteine residues were identified as the alkylated derivative by amino acid analysis. Acetylene, which inhibits H-D exchange and abolishes the Ni-C EPR signal, protected the enzyme from irreversible inhibition by iodoacetamide. These data indicate that iodoacetamide can reach the active site of the H2-activated hydrogenase from T. roseopersicina. This was not found to be the case with the seleno hydrogenase from Desulfovibrio baculatus (now Desulfomicrobium baculatus). Cysteine modification by iodoacetamide upon activation of the enzyme concomitant with loss of H-D exchange indicates that reductive activation makes at least one Cys residue of the active site available for alkylation.
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Affiliation(s)
- N A Zorin
- CEA/Grenoble, Laboratoire de Biochimie Microbienne (CNRS URA 1130 alliée à I'INSERM), Département de Biologie Moléculaire et Structurale, Grenoble, France
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Zorin NA, Medina M, Pusheva MA, Gogotov IN, Cammack R. Hydrogenase from the thermophilic bacteriumThermococcus stetteri: isolation and characterisation of EPR-detectable redox centres. FEMS Microbiol Lett 1996. [DOI: 10.1111/j.1574-6968.1996.tb08410.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Medina M, Claude Hatchikian E, Cammack R. Studies of light-induced nickel EPR signals in hydrogenase: comparison of enzymes with and without selenium. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 1996. [DOI: 10.1016/0005-2728(96)00007-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Serebryakova LT, Medina M, Zorin NA, Gogotov IN, Cammack R. Reversible hydrogenase of Anabaena variabilis ATCC 29413: catalytic properties and characterization of redox centres. FEBS Lett 1996; 383:79-82. [PMID: 8612797 DOI: 10.1016/0014-5793(96)00228-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The catalytic and spectroscopic properties of the reversible hydrogenase from the cyanobacterium Anabaena variabilis have been examined. The hydrogenase required reductive activation in order to elicit hydrogen-oxidation activity. Carbon monoxide was a weak (Ki=35 microM), reversible and competitive inhibitor. A flavin with the chromatographic properties of FMN, and nickel were detected in the purified enzyme. A. variabilis hydrogenase exhibited electron paramagnetic resonance (EPR) spectra in its hydrogen-reduced state, indicative of [2Fe-2S] and [4Fe-4S] clusters. Although no EPR signals due to nickel were detected, the results are consistent with the enzyme being a flavin-containing hydrogenase of the nickel-iron type.
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Affiliation(s)
- L T Serebryakova
- Institute of Soil Science and Photosynthesis, Russian Academy of Sciences, Pushchino, Moscow Region, Russia
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