151
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Smith SE, Yang JY, DuBois DL, Bullock RM. Reversible Electrocatalytic Production and Oxidation of Hydrogen at Low Overpotentials by a Functional Hydrogenase Mimic. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108461] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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152
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Smith SE, Yang JY, DuBois DL, Bullock RM. Reversible Electrocatalytic Production and Oxidation of Hydrogen at Low Overpotentials by a Functional Hydrogenase Mimic. Angew Chem Int Ed Engl 2012; 51:3152-5. [DOI: 10.1002/anie.201108461] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Indexed: 12/21/2022]
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153
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Sakamoto R, Tsukada S, Nishihara H. Multinuclear metalladithiolenes: focusing on electronic communication in mixed-valent states. Dalton Trans 2012; 41:10123-35. [DOI: 10.1039/c2dt30787a] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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154
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Abstract
Nickel-containing carbon monoxide dehydrogenases, acetyl-CoA synthases, nickel-iron hydrogenases, and diron hydrogenases are distinct metalloenzymes yet they share a number of important characteristics. All are O(2)-sensitive, with active-sites composed of iron and/or nickel ions coordinated primarily by sulfur ligands. In each case, two metals are juxtaposed at the "heart" of the active site, within range of forming metal-metal bonds. These active-site clusters exhibit multielectron redox abilities and must be reductively activated for catalysis. Reduction potentials are milder than expected based on formal oxidation state changes. When reductively activated, each cluster attacks an electrophilic substrate via an oxidative addition reaction. This affords a two-electron-reduced substrate bound to one or both metals of an oxidized cluster. M-M bonds have been established in hydrogenases where they serve to initiate the oxidative addition of protons and perhaps stabilize active sites in multiple redox states. The same may be true of the CODH and ACS active sites-Ni-Fe and Ni-Ni bonds in these sites may play critical roles in catalysis, stabilizing low-valence states and initiating oxidative addition of CO(2) and methyl group cations, respectively. In this article, the structural and functional commonalities of these metalloenzyme active sites are described, and the case is made for the formation and use of metal-metal bonds in each enzyme mentioned. As a post-script, the importance of Fe-Fe bonds in the nitrogenase FeMoco active site is discussed.
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Affiliation(s)
- Paul A Lindahl
- Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
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155
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Krishnan S, Armstrong FA. Order-of-magnitude enhancement of an enzymatic hydrogen-air fuel cell based on pyrenyl carbon nanostructures. Chem Sci 2012. [DOI: 10.1039/c2sc01103d] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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156
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Gao MR, Lin ZY, Zhuang TT, Jiang J, Xu YF, Zheng YR, Yu SH. Mixed-solution synthesis of sea urchin-like NiSe nanofiber assemblies as economical Pt-free catalysts for electrochemical H2 production. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31916k] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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157
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Lakadamyali F, Kato M, Reisner E. Colloidal metal oxide particles loaded with synthetic catalysts for solar H2production. Faraday Discuss 2012; 155:191-205; discussion 207-22. [DOI: 10.1039/c1fd00077b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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158
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Lojou E. Hydrogenases as catalysts for fuel cells: Strategies for efficient immobilization at electrode interfaces. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.03.002] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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159
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Frielingsdorf S, Schubert T, Pohlmann A, Lenz O, Friedrich B. A Trimeric Supercomplex of the Oxygen-Tolerant Membrane-Bound [NiFe]-Hydrogenase from Ralstonia eutropha H16. Biochemistry 2011; 50:10836-43. [DOI: 10.1021/bi201594m] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefan Frielingsdorf
- Institut für Biologie-Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestraβe
117, 10115 Berlin, Germany
| | - Torsten Schubert
- Institut für Biologie-Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestraβe
117, 10115 Berlin, Germany
| | - Anne Pohlmann
- Institut für Biologie-Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestraβe
117, 10115 Berlin, Germany
| | - Oliver Lenz
- Institut für Biologie-Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestraβe
117, 10115 Berlin, Germany
| | - Bärbel Friedrich
- Institut für Biologie-Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestraβe
117, 10115 Berlin, Germany
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160
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Ash PA, Vincent KA. Spectroscopic analysis of immobilised redox enzymes under direct electrochemical control. Chem Commun (Camb) 2011; 48:1400-9. [PMID: 22057715 DOI: 10.1039/c1cc15871f] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article reviews recent developments in spectroscopic analysis of electrode-immobilised enzymes under direct, unmediated electrochemical control. These methods unite the suite of spectroscopic methods available for characterisation of structural, electronic and coordination changes in proteins with the exquisite control over complex redox enzymes that can be achieved in protein film electrochemistry in which immobilised protein molecules exchange electrons directly with an electrode. This combination is particularly powerful in studies of highly active enzymes where redox states can be controlled even under fast electrocatalytic turnover. We examine examples in which UV-visible, IR, Raman and MCD spectroscopy have been combined with direct electrochemistry to probe redox-dependent chemistry, and consider future opportunities for 'direct' spectroelectrochemistry of immobilised enzymes.
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Affiliation(s)
- Philip A Ash
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
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161
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Hopkins RC, Sun J, Jenney FE, Chandrayan SK, McTernan PM, Adams MWW. Homologous expression of a subcomplex of Pyrococcus furiosus hydrogenase that interacts with pyruvate ferredoxin oxidoreductase. PLoS One 2011; 6:e26569. [PMID: 22039508 PMCID: PMC3200332 DOI: 10.1371/journal.pone.0026569] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Accepted: 09/29/2011] [Indexed: 11/18/2022] Open
Abstract
Hydrogen gas is an attractive alternative fuel as it is carbon neutral and has higher energy content per unit mass than fossil fuels. The biological enzyme responsible for utilizing molecular hydrogen is hydrogenase, a heteromeric metalloenzyme requiring a complex maturation process to assemble its O(2)-sensitive dinuclear-catalytic site containing nickel and iron atoms. To facilitate their utility in applied processes, it is essential that tools are available to engineer hydrogenases to tailor catalytic activity and electron carrier specificity, and decrease oxygen sensitivity using standard molecular biology techniques. As a model system we are using hydrogen-producing Pyrococcus furiosus, which grows optimally at 100°C. We have taken advantage of a recently developed genetic system that allows markerless chromosomal integrations via homologous recombination. We have combined a new gene marker system with a highly-expressed constitutive promoter to enable high-level homologous expression of an engineered form of the cytoplasmic NADP-dependent hydrogenase (SHI) of P. furiosus. In a step towards obtaining 'minimal' hydrogenases, we have successfully produced the heterodimeric form of SHI that contains only two of the four subunits found in the native heterotetrameric enzyme. The heterodimeric form is highly active (150 units mg(-1) in H(2) production using the artificial electron donor methyl viologen) and thermostable (t(1/2) ∼0.5 hour at 90°C). Moreover, the heterodimer does not use NADPH and instead can directly utilize reductant supplied by pyruvate ferredoxin oxidoreductase from P. furiosus. The SHI heterodimer and POR therefore represent a two-enzyme system that oxidizes pyruvate and produces H(2) in vitro without the need for an intermediate electron carrier.
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Affiliation(s)
- R. Christopher Hopkins
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Junsong Sun
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Francis E. Jenney
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Sanjeev K. Chandrayan
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Patrick M. McTernan
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Michael W. W. Adams
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
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162
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Matsumoto T, Nagahama T, Cho J, Hizume T, Suzuki M, Ogo S. Preparation and Reactivity of a Nickel Dihydride Complex. Angew Chem Int Ed Engl 2011; 50:10578-80. [DOI: 10.1002/anie.201104918] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Indexed: 12/22/2022]
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163
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Matsumoto T, Nagahama T, Cho J, Hizume T, Suzuki M, Ogo S. Preparation and Reactivity of a Nickel Dihydride Complex. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104918] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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164
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Hawkins AS, Han Y, Lian H, Loder AJ, Menon AL, Iwuchukwu IJ, Keller M, Leuko TT, Adams MW, Kelly RM. Extremely Thermophilic Routes to Microbial Electrofuels. ACS Catal 2011. [DOI: 10.1021/cs2003017] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aaron S. Hawkins
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Yejun Han
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Hong Lian
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Andrew J. Loder
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
| | - Angeli L. Menon
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Ifeyinwa J. Iwuchukwu
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Matthew Keller
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Therese T. Leuko
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Michael W.W. Adams
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia 30602, United States
| | - Robert M. Kelly
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695-7905, United States
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165
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McIntosh CL, Germer F, Schulz R, Appel J, Jones AK. The [NiFe]-hydrogenase of the cyanobacterium Synechocystis sp. PCC 6803 works bidirectionally with a bias to H2 production. J Am Chem Soc 2011; 133:11308-19. [PMID: 21675712 DOI: 10.1021/ja203376y] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein film electrochemistry (PFE) was utilized to characterize the catalytic activity and oxidative inactivation of a bidirectional [NiFe]-hydrogenase (HoxEFUYH) from the cyanobacterium Synechocystis sp. PCC 6803. PFE provides precise control of the redox potential of the adsorbed enzyme so that its activity can be monitored under changing experimental conditions as current. The properties of HoxEFUYH are different from those of both the standard uptake and the "oxygen-tolerant" [NiFe]-hydrogenases. First, HoxEFUYH is biased toward proton reduction as opposed to hydrogen oxidation. Second, despite being expressed under aerobic conditions in vivo, HoxEFUYH is clearly not oxygen-tolerant. Aerobic inactivation of catalytic hydrogen oxidation by HoxEFUYH is total and nearly instantaneous, producing two inactive states. However, unlike the Ni-A and Ni-B inactive states of standard [NiFe]-hydrogenases, both of these states are quickly (<90 s) reactivated by removal of oxygen and exposure to reducing conditions. Third, proton reduction continues at 25-50% of the maximal rate in the presence of 1% oxygen. Whereas most previously characterized [NiFe]-hydrogenases seem to be preferential hydrogen oxidizing catalysts, the cyanobacterial enzyme works effectively in both directions. This unusual catalytic bias as well as the ability to be quickly reactivated may be essential to fulfilling the physiological role in cyanobacteria, organisms expected to experience swings in cellular reduction potential as they switch between aerobic conditions in the light and dark anaerobic conditions. Our results suggest that the uptake [NiFe]-hydrogenases alone are not representative of the catalytic diversity of [NiFe]-hydrogenases, and the bidirectional heteromultimeric enzymes may serve as valuable models to understand the diverse mechanisms of tuning the reactivity of the hydrogen activating site.
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Affiliation(s)
- Chelsea L McIntosh
- Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287, USA
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166
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Merki D, Fierro S, Vrubel H, Hu X. Amorphous molybdenum sulfide films as catalysts for electrochemical hydrogen production in water. Chem Sci 2011. [DOI: 10.1039/c1sc00117e] [Citation(s) in RCA: 1134] [Impact Index Per Article: 87.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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167
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Wang PH, Best RB, Blumberger J. A microscopic model for gas diffusion dynamics in a [NiFe]-hydrogenase. Phys Chem Chem Phys 2011; 13:7708-19. [PMID: 21409188 DOI: 10.1039/c0cp02098b] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We describe and apply a microscopic model for the calculation of gas diffusion rates in a [NiFe]-hydrogenase. This enzyme has attracted much interest for use as a H(2) oxidising catalyst in biofuel cells, but a major problem is their inhibition by CO and O(2). In our model, the diffusive hopping of gas molecules in the protein interior is coarse grained using a master equation approach with transition rates estimated from equilibrium and non-equilibrium pulling simulations. Propagating the rate matrix in time, we find that the probability for a gas molecule to reach the enzyme active site follows a mono-exponential increase. Fits to a phenomenological rate law give an effective diffusion rate constant for CO that is in very good agreement with experimental measurements. We find that CO prefers to move along the canonical 'hydrophobic' main channel towards the active site, in contrast to O(2) and H(2), which were previously shown to explore larger fractions of the protein. Differences in the diffusion of the three gases are discussed in light of recent efforts to engineer a gas selectivity filter in the enzyme.
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Affiliation(s)
- Po-hung Wang
- Department of Physics and Astronomy, University College London, London WC1E 6BT, UK
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168
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Svedružić D, Blackburn JL, Tenent RC, Rocha JDR, Vinzant TB, Heben MJ, King PW. High-Performance Hydrogen Production and Oxidation Electrodes with Hydrogenase Supported on Metallic Single-Wall CarbonNanotube Networks. J Am Chem Soc 2011; 133:4299-306. [DOI: 10.1021/ja104785e] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | | | | | - Michael J. Heben
- Department of Physics and Astronomy, University of Toledo, 2600 Dorr Sreet, Toledo, Ohio 43607, United States
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169
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Hydrogen bioelectrooxidation in ionic liquids: From cytochrome c3 redox behavior to hydrogenase activity. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2010.12.104] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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170
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Wang PH, Best RB, Blumberger J. Multiscale simulation reveals multiple pathways for H2 and O2 transport in a [NiFe]-hydrogenase. J Am Chem Soc 2011; 133:3548-56. [PMID: 21341658 DOI: 10.1021/ja109712q] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogenases are enzymes that catalyze the reversible conversion of hydrogen molecules to protons and electrons. The mechanism by which the gas molecules reach the active site is important for understanding the function of the enzyme and may play a role in the selectivity for hydrogen over inhibitor molecules. Here, we develop a general multiscale molecular simulation approach for the calculation of diffusion rates and determination of pathways by which substrate or inhibitor gases can reach the protein active site. Combining kinetic data from both equilibrium simulations and enhanced sampling, we construct a master equation describing the movement of gas molecules within the enzyme. We find that the time-dependent gas population of the active site can be fit to the same phenomenological rate law used to interpret experiments, with corresponding diffusion rates in very good agreement with experimental data. However, in contrast to the conventional picture, in which the gases follow a well-defined hydrophobic tunnel, we find that there is a diverse network of accessible pathways by which the gas molecules can reach the active site. The previously identified tunnel accounts for only about 60% of the total flux. Our results suggest that the dramatic decrease in the diffusion rate for mutations involving the residue Val74 could be in part due to the narrowing of the passage Val74-Arg476, immediately adjacent to the binding site, explaining why mutations of Leu122 had only a negligible effect in experiment. Our method is not specific to the [NiFe]-hydrogenase and should be generally applicable to the transport of small molecules in proteins.
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Affiliation(s)
- Po-hung Wang
- Department of Physics and Astronomy, University College London, London WC1E 6BT, United Kingdom
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171
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Villano M, De Bonis L, Rossetti S, Aulenta F, Majone M. Bioelectrochemical hydrogen production with hydrogenophilic dechlorinating bacteria as electrocatalytic agents. BIORESOURCE TECHNOLOGY 2011; 102:3193-3199. [PMID: 21129958 DOI: 10.1016/j.biortech.2010.10.146] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2010] [Revised: 10/06/2010] [Accepted: 10/07/2010] [Indexed: 05/30/2023]
Abstract
Hydrogenophilic dechlorinating bacteria were shown to catalyze H(2) production by proton reduction, with electrodes serving as electron donors, either in the presence or in the absence of a redox mediator. In the presence of methyl viologen, Desulfitobacterium- and Dehalococcoides-enriched cultures produced H(2) at rates as high as 12.4 μeq/mgVSS (volatile suspended solids)/d, with the cathode set at -450 mV vs. the standard hydrogen electrode (SHE), hence very close to the reversible H(+)/H(2) potential value of -414 mV at pH 7. Notably, the Desulfitobacterium-enriched culture was capable of catalyzing H(2) production without mediators at cathode potentials lower than -700 mV. At -750 mV, the H(2) production rate with Desulfitobacterium spp. was 13.5 μeq/mgVSS/d (or 16 μeq/cm(2)/d), nearly four times higher than that of the abiotic controls. Overall, this study suggests the possibility of employing dechlorinating bacteria as hydrogen catalysts in new energy technologies such as microbial electrolysis cells.
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Affiliation(s)
- Marianna Villano
- Department of Chemistry, Sapienza University of Rome, Rome, Italy
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172
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Baltazar CSA, Marques MC, Soares CM, DeLacey AM, Pereira IAC, Matias PM. Nickel–Iron–Selenium Hydrogenases – An Overview. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001127] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Carla S. A. Baltazar
- Protein Modeling Laboratory, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐443‐3644
| | - Marta C. Marques
- Bacterial Energy Metabolism Laboratory, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐441‐1277
- Laboratory of Industry and Medicine Applied Crystallography, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐443‐3644
| | - Cláudio M. Soares
- Protein Modeling Laboratory, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐443‐3644
| | - Antonio M. DeLacey
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, Spain, Fax: +34‐915854760
| | - Inês A. C. Pereira
- Bacterial Energy Metabolism Laboratory, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐441‐1277
| | - Pedro M. Matias
- Laboratory of Industry and Medicine Applied Crystallography, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Av. da República, EAN, 2780‐157 Oeiras, Portugal, Fax: +351‐21‐443‐3644
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173
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Wait AF, Brandmayr C, Stripp ST, Cavazza C, Fontecilla-Camps JC, Happe T, Armstrong FA. Formaldehyde—A Rapid and Reversible Inhibitor of Hydrogen Production by [FeFe]-Hydrogenases. J Am Chem Soc 2011; 133:1282-5. [DOI: 10.1021/ja110103p] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Annemarie F. Wait
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Caterina Brandmayr
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
| | - Sven T. Stripp
- Lehrstuhl fur Biochemie der Pflanzen, AG Photobiotechnologie, Ruhr-Universität, 44780 Bochum, Germany
| | - Christine Cavazza
- Laboratoire de Crystallographie et Crystallographie des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horowitz, 38027 Grenoble Cedex 1, France
| | - Juan C. Fontecilla-Camps
- Laboratoire de Crystallographie et Crystallographie des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horowitz, 38027 Grenoble Cedex 1, France
| | - Thomas Happe
- Lehrstuhl fur Biochemie der Pflanzen, AG Photobiotechnologie, Ruhr-Universität, 44780 Bochum, Germany
| | - Fraser A. Armstrong
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, U.K
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174
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Morra S, Valetti F, Sadeghi SJ, King PW, Meyer T, Gilardi G. Direct electrochemistry of an [FeFe]-hydrogenase on a TiO2 Electrode. Chem Commun (Camb) 2011; 47:10566-8. [DOI: 10.1039/c1cc14535e] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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175
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Reisner E, Armstrong FA. A TiO₂ nanoparticle system for sacrificial solar H₂ production prepared by rational combination of a hydrogenase with a ruthenium photosensitizer. Methods Mol Biol 2011; 743:107-117. [PMID: 21553186 DOI: 10.1007/978-1-61779-132-1_9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A hybrid system comprising a hydrogenase and a photosensitizer co-attached to a nanoparticle serves as a rational model for fast dihydrogen (H(2)) production using visible light. This chapter describes a stepwise procedure for preparing TiO(2) nanoparticles functionalized with a hydrogenase from Desulfomicrobium baculatum (Db [NiFeSe]-H) and a tris(bipyridyl)ruthenium photosensitizer (RuP). Upon irradiation with visible light, these particles produce H(2) from neutral water at room temperature in the presence of a sacrificial electron donor - a test-system for the cathodic half reaction of water splitting. In particular, we describe how a hydrogenase and a photosensitizer with desired properties, including strong adsorption on TiO(2), can be selected by electrochemical methods. The catalyst Db [NiFeSe]-H is selected for its high H(2) production activity even when H(2) and traces of O(2) are present. Adsorption of Db [NiFeSe]-H and RuP on TiO(2) electrodes results in high electrochemical and photocatalytic activities that translate into nanoparticles exhibiting efficient light harvesting, charge separation, and sacrificial H(2) generation.
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Affiliation(s)
- Erwin Reisner
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, CB2 1EW, UK
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176
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Liebgott PP, de Lacey AL, Burlat B, Cournac L, Richaud P, Brugna M, Fernandez VM, Guigliarelli B, Rousset M, Léger C, Dementin S. Original Design of an Oxygen-Tolerant [NiFe] Hydrogenase: Major Effect of a Valine-to-Cysteine Mutation near the Active Site. J Am Chem Soc 2010; 133:986-97. [PMID: 21175174 DOI: 10.1021/ja108787s] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Pierre-Pol Liebgott
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | | | - Bénédicte Burlat
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
- Aix-Marseille Université, 3 place Victor-Hugo, 13331 Marseille, France
| | - Laurent Cournac
- CEA, DSV, IBEB, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, 13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, 3 place Victor-Hugo, 13331 Marseille, France
- CNRS, UMR, Biologie Végétale et Microbiologie Environnementales, 13108 Saint Paul Lez Durance, France
| | - Pierre Richaud
- CEA, DSV, IBEB, Laboratoire de Bioénergétique et Biotechnologie des Bactéries et Microalgues, 13108 Saint-Paul-lez-Durance, France
- Aix-Marseille Université, 3 place Victor-Hugo, 13331 Marseille, France
- CNRS, UMR, Biologie Végétale et Microbiologie Environnementales, 13108 Saint Paul Lez Durance, France
| | - Myriam Brugna
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
- Aix-Marseille Université, 3 place Victor-Hugo, 13331 Marseille, France
| | | | - Bruno Guigliarelli
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
- Aix-Marseille Université, 3 place Victor-Hugo, 13331 Marseille, France
| | - Marc Rousset
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Christophe Léger
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | - Sébastien Dementin
- CNRS, Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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177
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Ciaccafava A, Infossi P, Giudici-Orticoni MT, Lojou E. Stabilization role of a phenothiazine derivative on the electrocatalytic oxidation of hydrogen via Aquifex aeolicus hydrogenase at graphite membrane electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18534-18541. [PMID: 21043442 DOI: 10.1021/la103714n] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The [NiFe] membrane-bound hydrogenase from the microaerophilic, hyperthermophilic Aquifex aeolicus bacterium (Aa Hase) presents oxygen, carbon monoxide, and temperature resistances. Since it oxidizes hydrogen with high turnover, this enzyme is thus of particular interest for biotechnological applications, such as biofuel cells. Efficient immobilization of the enzyme onto electrodes is however a mandatory step. To gain further insight into the parameters governing the interfacial electron process, cyclic voltammetry was performed combining the use of a phenothiazine dye with a membrane electrode design where the enzyme is entrapped in a thin layer. In the absence of the phenothiazine dye, direct electron transfer (DET) for H(2) oxidation is observed due to Aa Hase adsorbed onto the PG electrode. An unexpected loss of the catalytic current with time is however observed. The effect of toluidine blue O (TBO) on the catalytic process is first studied with TBO in solution. In addition to the expected mediated electron transfer process (MET), TBO is demonstrated to reconnect directly some Aa Hase molecules possibly released from the electrode but still entrapped in the thin layer. On adsorbed TBO the two same processes occur demonstrating the ability of the TBO film to connect Aa Hase via a DET process. Loss of activity is however observed due to the poor stability of adsorbed TBO at high temperatures. Aa Hase immobilization is then studied on electropolymerized TBO (pTBO). The effect of film thickness, temperature, presence of inhibitors and pH is evaluated. Given a film thickness less than 20 nm, H(2) oxidation proceeds via a mixed DET/MET process through the pTBO film. A high and very stable H(2) oxidation activity is reached, showing the potential applicability of the bioelectrode for biotechnologies. Finally, the multifunctional roles of TBO-based matrix are underlined, including redox mediator, Aa Hase anchor, but also buffering and ROS scavenger capabilities to drive pH local changes and avoid oxidative damage.
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Affiliation(s)
- Alexandre Ciaccafava
- Unité de Bioénergétique et Ingénierie des Protéines, UPR 9036, Institut de Microbiologie de la Méditerranée-CNRS, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
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178
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Reisner E. Solar Hydrogen Evolution with Hydrogenases: From Natural to Hybrid Systems. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000986] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Erwin Reisner
- School of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, UK
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179
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Brown KA, Dayal S, Ai X, Rumbles G, King PW. Controlled assembly of hydrogenase-CdTe nanocrystal hybrids for solar hydrogen production. J Am Chem Soc 2010; 132:9672-80. [PMID: 20583755 DOI: 10.1021/ja101031r] [Citation(s) in RCA: 222] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We present a study of the self-assembly, charge-transfer kinetics, and catalytic properties of hybrid complexes of CdTe nanocrystals (nc-CdTe) and Clostridium acetobutylicum [FeFe]-hydrogenase I (H(2)ase). Molecular assembly of nc-CdTe and H(2)ase was mediated by electrostatic interactions and resulted in stable, enzymatically active complexes. The assembly kinetics was monitored by nc-CdTe photoluminescence (PL) spectroscopy and exhibited first-order Langmuir adsorption behavior. PL was also used to monitor the transfer of photogenerated electrons from nc-CdTe to H(2)ase. The extent to which the intramolecular electron transfer (ET) contributed to the relaxation of photoexcited nc-CdTe relative to the intrinsic radiative and nonradiative (heat dissipation and surface trapping) recombination pathways was shown by steady-state PL spectroscopy to be a function of the nc-CdTe/H(2)ase molar ratio. When the H(2)ase concentration was lower than the nc-CdTe concentration during assembly, the resulting contribution of ET to PL bleaching was enhanced, which resulted in maximal rates of H(2) photoproduction. Photoproduction of H(2) was also a function of the nc-CdTe PL quantum efficiency (PLQE), with higher-PLQE nanocrystals producing higher levels of H(2), suggesting that photogenerated electrons are transferred to H(2)ase directly from core nanocrystal states rather than from surface-trap states. The duration of H(2) photoproduction was limited by the stability of nc-CdTe under the reactions conditions. A first approach to optimization with ascorbic acid present as a sacrificial donor resulted in photon-to-H(2) efficiencies of 9% under monochromatic light and 1.8% under AM 1.5 white light. In summary, nc-CdTe and H(2)ase spontaneously assemble into complexes that upon illumination transfer photogenerated electrons from core nc-CdTe states to H(2)ase, with low H(2)ase coverages promoting optimal orientations for intramolecular ET and solar H(2) production.
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Affiliation(s)
- Katherine A Brown
- Biosciences Center, National Renewable Energy Laboratory, Golden, Colorado 80401, USA
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180
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Dey A. Density Functional Theory Calculations on the Mononuclear Non-Heme Iron Active Site of Hmd Hydrogenase: Role of the Internal Ligands in Tuning External Ligand Binding and Driving H2 Heterolysis. J Am Chem Soc 2010; 132:13892-901. [DOI: 10.1021/ja1041918] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Abhishek Dey
- Indian Association for the Cultivation of Science, 2A Raja S. C. Mullick Road, Kolkata, India 700032
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181
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Allakhverdiev SI, Thavasi V, Kreslavski VD, Zharmukhamedov SK, Klimov VV, Ramakrishna S, Los DA, Mimuro M, Nishihara H, Carpentier R. Photosynthetic hydrogen production. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2010. [DOI: 10.1016/j.jphotochemrev.2010.07.002] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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182
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Wiedner ES, Yang JY, Dougherty WG, Kassel WS, Bullock RM, DuBois MR, DuBois DL. Comparison of Cobalt and Nickel Complexes with Sterically Demanding Cyclic Diphosphine Ligands: Electrocatalytic H2 Production by [Co(PtBu2NPh2)(CH3CN)3](BF4)2. Organometallics 2010. [DOI: 10.1021/om100395r] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eric S. Wiedner
- Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - Jenny Y. Yang
- Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | | | - W. Scott Kassel
- Department of Chemistry, Villanova University, Villanova, Pennsylvania 19085
| | - R. Morris Bullock
- Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - M. Rakowski DuBois
- Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
| | - Daniel L. DuBois
- Chemical and Materials Sciences Division, Pacific Northwest National Laboratory, P.O. Box 999, K2-57, Richland, Washington 99352
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183
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Pandelia ME, Fourmond V, Tron-Infossi P, Lojou E, Bertrand P, Léger C, Giudici-Orticoni MT, Lubitz W. Membrane-bound hydrogenase I from the hyperthermophilic bacterium Aquifex aeolicus: enzyme activation, redox intermediates and oxygen tolerance. J Am Chem Soc 2010; 132:6991-7004. [PMID: 20441192 DOI: 10.1021/ja910838d] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The membrane-bound hydrogenase (Hase I) of the hyperthermophilic bacterium Aquifex aeolicus belongs to an intriguing class of redox enzymes that show enhanced thermostability and oxygen tolerance. Protein film electrochemistry is employed here to portray the interaction of Hase I with molecular oxygen and obtain an overall picture of the catalytic activity. Fourier transform infrared (FTIR) spectroscopy integrated with in situ electrochemistry is used to identify structural details of the [NiFe] site and the intermediate states involved in its redox chemistry. We found that the active site coordination is similar to that of standard hydrogenases, with a conserved Fe(CN)(2)CO moiety. However, only four catalytic intermediates could be detected; these correspond structurally to the Ni-B, Ni-SI(a), Ni-C, and Ni-R states of standard hydrogenases. The Ni-SI/Ni-C and Ni-C/Ni-R midpoint potentials are approximately 100 mV more positive than those observed in mesophilic hydrogenases, which may be the reason that A. aeolicus Hase I is more suitable as a catalyst for H(2) oxidation than production. Protein film electrochemistry shows that oxygen inhibits the enzyme by reacting at the active site to form a single species (Ni-B); the same inactive state is obtained under oxidizing, anaerobic conditions. The mechanism of anaerobic inactivation and reactivation in A. aeolicus Hase I is similar to that in standard hydrogenases. However, the reactivation of the former is more than 2 orders of magnitude faster despite the fact that reduction of Ni-B is not thermodynamically more favorable. A scheme for the enzymatic mechanism of A. aeolicus Hase I is presented, and the results are discussed in relation to the proposed models of oxygen tolerance.
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Affiliation(s)
- Maria-Eirini Pandelia
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D45470, Mülheim a.d. Ruhr, Germany
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184
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Pandelia ME, Ogata H, Lubitz W. Intermediates in the catalytic cycle of [NiFe] hydrogenase: functional spectroscopy of the active site. Chemphyschem 2010; 11:1127-40. [PMID: 20301175 DOI: 10.1002/cphc.200900950] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The [NiFe] hydrogenase from the anaerobic sulphate reducing bacterium Desulfovibrio vulgaris Miyazaki F is an excellent model for constructing a mechanism for the function of the so-called 'oxygen-sensitive' hydrogenases. The present review focuses on spectroscopic investigations of the active site intermediates playing a role in the activation/deactivation and catalytic cycle of this enzyme as well as in the inhibition by carbon monoxide or molecular oxygen and the light-sensitivity of the hydrogenase. The methods employed include magnetic resonance and vibrational (FTIR) techniques combined with electrochemistry that deliver information about details of the geometrical and electronic structure of the intermediates and their redox behaviour. Based on these data a mechanistic scheme is developed.
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Affiliation(s)
- Maria-Eirini Pandelia
- Max-Planck Institut für Bioanorganische Chemie, Stiftstrasse 34-36, 45470, Mülheim an der Ruhr, Germany
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185
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A molecular molybdenum-oxo catalyst for generating hydrogen from water. Nature 2010; 464:1329-33. [PMID: 20428167 DOI: 10.1038/nature08969] [Citation(s) in RCA: 464] [Impact Index Per Article: 33.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Accepted: 02/26/2010] [Indexed: 11/09/2022]
Abstract
A growing awareness of issues related to anthropogenic climate change and an increase in global energy demand have made the search for viable carbon-neutral sources of renewable energy one of the most important challenges in science today. The chemical community is therefore seeking efficient and inexpensive catalysts that can produce large quantities of hydrogen gas from water. Here we identify a molybdenum-oxo complex that can catalytically generate gaseous hydrogen either from water at neutral pH or from sea water. This work shows that high-valency metal-oxo species can be used to create reduction catalysts that are robust and functional in water, a concept that has broad implications for the design of 'green' and sustainable chemistry cycles.
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186
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Sun J, Hopkins RC, Jenney FE, McTernan PM, Adams MWW. Heterologous expression and maturation of an NADP-dependent [NiFe]-hydrogenase: a key enzyme in biofuel production. PLoS One 2010; 5:e10526. [PMID: 20463892 PMCID: PMC2865534 DOI: 10.1371/journal.pone.0010526] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2010] [Accepted: 04/02/2010] [Indexed: 11/25/2022] Open
Abstract
Hydrogen gas is a major biofuel and is metabolized by a wide range of microorganisms. Microbial hydrogen production is catalyzed by hydrogenase, an extremely complex, air-sensitive enzyme that utilizes a binuclear nickel-iron [NiFe] catalytic site. Production and engineering of recombinant [NiFe]-hydrogenases in a genetically-tractable organism, as with metalloprotein complexes in general, has met with limited success due to the elaborate maturation process that is required, primarily in the absence of oxygen, to assemble the catalytic center and functional enzyme. We report here the successful production in Escherichia coli of the recombinant form of a cytoplasmic, NADP-dependent hydrogenase from Pyrococcus furiosus, an anaerobic hyperthermophile. This was achieved using novel expression vectors for the co-expression of thirteen P. furiosus genes (four structural genes encoding the hydrogenase and nine encoding maturation proteins). Remarkably, the native E. coli maturation machinery will also generate a functional hydrogenase when provided with only the genes encoding the hydrogenase subunits and a single protease from P. furiosus. Another novel feature is that their expression was induced by anaerobic conditions, whereby E. coli was grown aerobically and production of recombinant hydrogenase was achieved by simply changing the gas feed from air to an inert gas (N2). The recombinant enzyme was purified and shown to be functionally similar to the native enzyme purified from P. furiosus. The methodology to generate this key hydrogen-producing enzyme has dramatic implications for the production of hydrogen and NADPH as vehicles for energy storage and transport, for engineering hydrogenase to optimize production and catalysis, as well as for the general production of complex, oxygen-sensitive metalloproteins.
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Affiliation(s)
- Junsong Sun
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Robert C. Hopkins
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Francis E. Jenney
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Patrick M. McTernan
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
| | - Michael W. W. Adams
- Department of Biochemistry and Molecular Biology, University of Georgia, Athens, Georgia, United States of America
- * E-mail:
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187
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Ly HK, Marti MA, Martin DF, Alvarez-Paggi D, Meister W, Kranich A, Weidinger IM, Hildebrandt P, Murgida DH. Thermal Fluctuations Determine the Electron-Transfer Rates of Cytochrome c in Electrostatic and Covalent Complexes. Chemphyschem 2010; 11:1225-35. [DOI: 10.1002/cphc.200900966] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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188
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Zheng C, Kim K, Matsumoto T, Ogo S. The useful properties of H2O as a ligand of a hydrogenase mimic. Dalton Trans 2010; 39:2218-25. [PMID: 20162194 DOI: 10.1039/b921273f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper investigates the required properties of Ru-coordinated ligands of a Ni-Ru based hydrogenase mimic. A series of ligands, including MeCN, pyridine, H(2)O and OH(-) were coordinated to Ru, with H(2)O being the only ligand to promote H(2)-activation. In addition, a tethered pyridyl moiety was synthesised and found to completely inhibit H(2)-activation. We conclude, therefore, that H(2)O is the ideal ligand for this mimic as a result of both its mild basicity and the availability of two lone pairs for simultaneous binding to Ru and H(2).
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Affiliation(s)
- Chunbai Zheng
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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189
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Ichikawa K, Nonaka K, Matsumoto T, Kure B, Yoon KS, Higuchi Y, Yagi T, Ogo S. Concerto catalysis--harmonising [NiFe]hydrogenase and NiRu model catalysts. Dalton Trans 2010; 39:2993-4. [PMID: 20221530 DOI: 10.1039/b926061g] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This communication reports the successful merging of the chemical properties of a natural [NiFe]hydrogenase (Desulfovibrio vulgaris Miyazaki F) and our previously reported [NiRu] hydrogenase-mimic. The catalytic activity of both the natural enzyme and the mimic is almost identical, with the exception of working pH ranges, and this allows us to use them simultaneously in the same reaction flask. In such a manner, isotope exchange between D(2) and H(2)O could be conducted over an extended pH range (about 2-10) in one pot under mild conditions at ambient temperature and pressure.
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Affiliation(s)
- Koji Ichikawa
- Department of Chemistry and Biochemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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190
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Goldet G, Brandmayr C, Stripp ST, Happe T, Cavazza C, Fontecilla-Camps JC, Armstrong FA. Electrochemical kinetic investigations of the reactions of [FeFe]-hydrogenases with carbon monoxide and oxygen: comparing the importance of gas tunnels and active-site electronic/redox effects. J Am Chem Soc 2010; 131:14979-89. [PMID: 19824734 DOI: 10.1021/ja905388j] [Citation(s) in RCA: 130] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A major obstacle for future biohydrogen production is the oxygen sensitivity of [FeFe]-hydrogenases, the highly active catalysts produced by bacteria and green algae. The reactions of three representative [FeFe]-hydrogenases with O(2) have been studied by protein film electrochemistry under conditions of both H(2) oxidation and H(2) production, using CO as a complementary probe. The hydrogenases are DdHydAB and CaHydA from the bacteria Desulfovibrio desulfuricans and Clostridium acetobutylicum , and CrHydA1 from the green alga Chlamydomonas reinhardtii . Rates of inactivation depend on the redox state of the active site 'H-cluster' and on transport through the protein to reach the pocket in which the H-cluster is housed. In all cases CO reacts much faster than O(2). In the model proposed, CaHydA shows the most sluggish gas transport and hence little dependence of inactivation rate on H-cluster state, whereas DdHydAB shows a large dependence on H-cluster state and the least effective barrier to gas transport. All three enzymes show a similar rate of reactivation from CO inhibition, which increases upon illumination: the rate-determining step is thus assigned to cleavage of the labile Fe-CO bond, a reaction likely to be intrinsic to the atomic and electronic state of the H-cluster and less sensitive to the surrounding protein.
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Affiliation(s)
- Gabrielle Goldet
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
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191
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Zampella G, Fantucci P, De Gioia L. DFT characterization of the reaction pathways for terminal- to μ-hydride isomerisation in synthetic models of the [FeFe]-hydrogenase active site. Chem Commun (Camb) 2010; 46:8824-6. [DOI: 10.1039/c0cc02821e] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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192
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Cracknell JA, Friedrich B, Armstrong FA. Gas pressure effects on the rates of catalytic H2 oxidation by hydrogenases. Chem Commun (Camb) 2010; 46:8463-5. [DOI: 10.1039/c0cc03292a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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193
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Reisner E, Powell DJ, Cavazza C, Fontecilla-Camps JC, Armstrong FA. Visible Light-Driven H2 Production by Hydrogenases Attached to Dye-Sensitized TiO2 Nanoparticles. J Am Chem Soc 2009; 131:18457-66. [DOI: 10.1021/ja907923r] [Citation(s) in RCA: 362] [Impact Index Per Article: 24.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Erwin Reisner
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, United Kingdom, and Laboratoire de Crystallographie et Crystallogènese des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horrowitz, 38027 Grenoble Cedex 1, France
| | - Daniel J. Powell
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, United Kingdom, and Laboratoire de Crystallographie et Crystallogènese des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horrowitz, 38027 Grenoble Cedex 1, France
| | - Christine Cavazza
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, United Kingdom, and Laboratoire de Crystallographie et Crystallogènese des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horrowitz, 38027 Grenoble Cedex 1, France
| | - Juan C. Fontecilla-Camps
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, United Kingdom, and Laboratoire de Crystallographie et Crystallogènese des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horrowitz, 38027 Grenoble Cedex 1, France
| | - Fraser A. Armstrong
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QR, United Kingdom, and Laboratoire de Crystallographie et Crystallogènese des Protéines, Institut de Biologie Structurale, J.P. Ebel, CEA, CNRS, Université Joseph Fourier, 41, rue J. Horrowitz, 38027 Grenoble Cedex 1, France
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194
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A kinetic and thermodynamic understanding of O2 tolerance in [NiFe]-hydrogenases. Proc Natl Acad Sci U S A 2009; 106:20681-6. [PMID: 19934053 DOI: 10.1073/pnas.0905959106] [Citation(s) in RCA: 120] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In biology, rapid oxidation and evolution of H(2) is catalyzed by metalloenzymes known as hydrogenases. These enzymes have unusual active sites, consisting of iron complexed by carbonyl, cyanide, and thiolate ligands, often together with nickel, and are typically inhibited or irreversibly damaged by O(2). The Knallgas bacterium Ralstonia eutropha H16 (Re) uses H(2) as an energy source with O(2) as a terminal electron acceptor, and its membrane-bound uptake [NiFe]-hydrogenase (MBH) is an important example of an "O(2)-tolerant" hydrogenase. The mechanism of O(2) tolerance of Re MBH has been probed by measuring H(2) oxidation activity in the presence of O(2) over a range of potential, pH and temperature, and comparing with the same dependencies for individual processes involved in the attack by O(2) and subsequent reactivation of the active site. Most significantly, O(2) tolerance increases with increasing temperature and decreasing potentials. These trends correlate with the trends observed for reactivation kinetics but not for H(2) affinity or the kinetics of O(2) attack. Clearly, the rate of recovery is a crucial factor. We present a kinetic and thermodynamic model to account for O(2) tolerance in Re MBH that may be more widely applied to other [NiFe]-hydrogenases.
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195
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Armstrong FA. Dynamic electrochemical experiments on hydrogenases. PHOTOSYNTHESIS RESEARCH 2009; 102:541-550. [PMID: 19455401 DOI: 10.1007/s11120-009-9428-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2008] [Accepted: 04/23/2009] [Indexed: 05/27/2023]
Abstract
A powerful approach for studying hydrogenases, applying a suite of dynamic electrochemical techniques known as protein film electrochemistry, is trailblazing fresh discoveries and providing a wealth of quantitative data on these complex enzymes. The information now stemming from experiments on tiny quantities of hydrogenases ranges from their kinetics and catalytic bias (a preference to operate in H(2) oxidation vs. H(2) production) to wide differences in the ways they react with oxygen and other inhibitors. Tolerance of hydrogenase catalysis to oxygen is essential if organisms are to be exploited for photosynthetic hydrogen production, and is crucial in enabling aerobes to use trace H(2) as an energy source. Experiments described in this article may be adapted for other complex enzymes.
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Affiliation(s)
- Fraser A Armstrong
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford OX1 3QR, UK.
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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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Stripp ST, Goldet G, Brandmayr C, Sanganas O, Vincent KA, Haumann M, Armstrong FA, Happe T. How oxygen attacks [FeFe] hydrogenases from photosynthetic organisms. Proc Natl Acad Sci U S A 2009; 106:17331-6. [PMID: 19805068 PMCID: PMC2765078 DOI: 10.1073/pnas.0905343106] [Citation(s) in RCA: 219] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2009] [Indexed: 12/31/2022] Open
Abstract
Green algae such as Chlamydomonas reinhardtii synthesize an [FeFe] hydrogenase that is highly active in hydrogen evolution. However, the extreme sensitivity of [FeFe] hydrogenases to oxygen presents a major challenge for exploiting these organisms to achieve sustainable photosynthetic hydrogen production. In this study, the mechanism of oxygen inactivation of the [FeFe] hydrogenase CrHydA1 from C. reinhardtii has been investigated. X-ray absorption spectroscopy shows that reaction with oxygen results in destruction of the [4Fe-4S] domain of the active site H-cluster while leaving the di-iron domain (2Fe(H)) essentially intact. By protein film electrochemistry we were able to determine the order of events leading up to this destruction. Carbon monoxide, a competitive inhibitor of CrHydA1 which binds to an Fe atom of the 2Fe(H) domain and is otherwise not known to attack FeS clusters in proteins, reacts nearly two orders of magnitude faster than oxygen and protects the enzyme against oxygen damage. These results therefore show that destruction of the [4Fe-4S] cluster is initiated by binding and reduction of oxygen at the di-iron domain-a key step that is blocked by carbon monoxide. The relatively slow attack by oxygen compared to carbon monoxide suggests that a very high level of discrimination can be achieved by subtle factors such as electronic effects (specific orbital overlap requirements) and steric constraints at the active site.
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Affiliation(s)
- Sven T. Stripp
- Lehrstuhl Biochemie der Pflanzen, AG Photobiotechnologie, Ruhr Universität Bochum, Universitätsstrasse 150, 44801 Bochum, Germany
| | - Gabrielle Goldet
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom; and
| | - Caterina Brandmayr
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom; and
| | - Oliver Sanganas
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Kylie A. Vincent
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom; and
| | - Michael Haumann
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Fraser A. Armstrong
- Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom; and
| | - Thomas Happe
- Lehrstuhl Biochemie der Pflanzen, AG Photobiotechnologie, Ruhr Universität Bochum, Universitätsstrasse 150, 44801 Bochum, Germany
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Immobilization of the hyperthermophilic hydrogenase from Aquifex aeolicus bacterium onto gold and carbon nanotube electrodes for efficient H2 oxidation. J Biol Inorg Chem 2009; 14:1275-88. [DOI: 10.1007/s00775-009-0572-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2009] [Accepted: 07/04/2009] [Indexed: 10/20/2022]
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