1
|
Fasano A, Fourmond V, Léger C. Outer-sphere effects on the O 2 sensitivity, catalytic bias and catalytic reversibility of hydrogenases. Chem Sci 2024; 15:5418-5433. [PMID: 38638217 PMCID: PMC11023054 DOI: 10.1039/d4sc00691g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Accepted: 03/15/2024] [Indexed: 04/20/2024] Open
Abstract
The comparison of homologous metalloenzymes, in which the same inorganic active site is surrounded by a variable protein matrix, has demonstrated that residues that are remote from the active site may have a great influence on catalytic properties. In this review, we summarise recent findings on the diverse molecular mechanisms by which the protein matrix may define the oxygen tolerance, catalytic directionality and catalytic reversibility of hydrogenases, enzymes that catalyse the oxidation and evolution of H2. These mechanisms involve residues in the second coordination sphere of the active site metal ion, more distant residues affecting protein flexibility through their side chains, residues lining the gas channel and even accessory subunits. Such long-distance effects, which contribute to making enzymes efficient, robust and different from one another, are a source of wonder for biochemists and a challenge for synthetic bioinorganic chemists.
Collapse
Affiliation(s)
- Andrea Fasano
- Laboratoire de Bioénergétique et Ingénierie des Protéines, CNRS, Aix Marseille Université, UMR 7281 Marseille France
| | - Vincent Fourmond
- Laboratoire de Bioénergétique et Ingénierie des Protéines, CNRS, Aix Marseille Université, UMR 7281 Marseille France
| | - Christophe Léger
- Laboratoire de Bioénergétique et Ingénierie des Protéines, CNRS, Aix Marseille Université, UMR 7281 Marseille France
| |
Collapse
|
2
|
Schumann C, Fernández Méndez J, Berggren G, Lindblad P. Novel concepts and engineering strategies for heterologous expression of efficient hydrogenases in photosynthetic microorganisms. Front Microbiol 2023; 14:1179607. [PMID: 37502399 PMCID: PMC10369191 DOI: 10.3389/fmicb.2023.1179607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Accepted: 06/09/2023] [Indexed: 07/29/2023] Open
Abstract
Hydrogen is considered one of the key enablers of the transition towards a sustainable and net-zero carbon economy. When produced from renewable sources, hydrogen can be used as a clean and carbon-free energy carrier, as well as improve the sustainability of a wide range of industrial processes. Photobiological hydrogen production is considered one of the most promising technologies, avoiding the need for renewable electricity and rare earth metal elements, the demands for which are greatly increasing due to the current simultaneous electrification and decarbonization goals. Photobiological hydrogen production employs photosynthetic microorganisms to harvest solar energy and split water into molecular oxygen and hydrogen gas, unlocking the long-pursued target of solar energy storage. However, photobiological hydrogen production has to-date been constrained by several limitations. This review aims to discuss the current state-of-the art regarding hydrogenase-driven photobiological hydrogen production. Emphasis is placed on engineering strategies for the expression of improved, non-native, hydrogenases or photosynthesis re-engineering, as well as their combination as one of the most promising pathways to develop viable large-scale hydrogen green cell factories. Herein we provide an overview of the current knowledge and technological gaps curbing the development of photobiological hydrogenase-driven hydrogen production, as well as summarizing the recent advances and future prospects regarding the expression of non-native hydrogenases in cyanobacteria and green algae with an emphasis on [FeFe] hydrogenases.
Collapse
Affiliation(s)
- Conrad Schumann
- Molecular Biomimetics, Department of Chemistry - Ångström, Uppsala University, Uppsala, Sweden
| | - Jorge Fernández Méndez
- Microbial Chemistry, Department of Chemistry - Ångström, Uppsala University, Uppsala, Sweden
| | - Gustav Berggren
- Molecular Biomimetics, Department of Chemistry - Ångström, Uppsala University, Uppsala, Sweden
| | - Peter Lindblad
- Microbial Chemistry, Department of Chemistry - Ångström, Uppsala University, Uppsala, Sweden
| |
Collapse
|
3
|
Graham JE, Niks D, Zane GM, Gui Q, Hom K, Hille R, Wall JD, Raman CS. How a Formate Dehydrogenase Responds to Oxygen: Unexpected O 2 Insensitivity of an Enzyme Harboring Tungstopterin, Selenocysteine, and [4Fe–4S] Clusters. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joel E. Graham
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
| | - Dimitri Niks
- Department of Biochemistry, University of California, Riverside, California92521, United States
| | - Grant M. Zane
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - Qin Gui
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - Kellie Hom
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
| | - Russ Hille
- Department of Biochemistry, University of California, Riverside, California92521, United States
| | - Judy D. Wall
- Department of Biochemistry, University of Missouri, Columbia, Missouri65211, United States
| | - C. S. Raman
- Department of Pharmaceutical Sciences, University of Maryland, Baltimore, Maryland21201, United States
| |
Collapse
|
4
|
Assil-Companioni L, Schmidt S, Heidinger P, Schwab H, Kourist R. Hydrogen-Driven Cofactor Regeneration for Stereoselective Whole-Cell C=C Bond Reduction in Cupriavidus necator. CHEMSUSCHEM 2019; 12:2361-2365. [PMID: 30889304 DOI: 10.1002/cssc.201900327] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 03/18/2019] [Indexed: 06/09/2023]
Abstract
The coupling of recombinantly expressed oxidoreductases to endogenous hydrogenases for cofactor recycling permits the omission of organic cosubstrates as sacrificial electron donors in whole-cell biotransformations. This increases atom efficiency and simplifies the reaction. A recombinant ene-reductase was expressed in the hydrogen-oxidizing proteobacterium Cupriavidus necator H16. In hydrogen-driven biotransformations, whole cells catalyzed asymmetric C=C bond reduction of unsaturated cyclic ketones with stereoselectivities up to >99 % enantiomeric excess. The use of hydrogen as a substrate for growth and cofactor regeneration is particularly attractive because it represents a strategy for improving atom efficiency and reducing side product formation associated with the recycling of organic cofactors.
Collapse
Affiliation(s)
- Leen Assil-Companioni
- Institute for Molecular Biotechnology, Graz University of Technology, Petersgasse 14/I, 8010, Graz, Austria
| | - Sandy Schmidt
- Institute for Molecular Biotechnology, Graz University of Technology, Petersgasse 14/I, 8010, Graz, Austria
| | - Petra Heidinger
- ACIB-Austrian Centre of Industrial Biotechnology, Petersgasse 14/V, 8010, Graz, Austria
| | - Helmut Schwab
- Institute for Molecular Biotechnology, Graz University of Technology, Petersgasse 14/I, 8010, Graz, Austria
| | - Robert Kourist
- Institute for Molecular Biotechnology, Graz University of Technology, Petersgasse 14/I, 8010, Graz, Austria
| |
Collapse
|
5
|
Abstract
Obtaining abundant pure hydrogen by reduction of water has an important implication in the development of clean and renewable energy. Hence research focused on the development of non-noble metal based facile and energy efficient catalysts for proton reduction is on the rise. However, for practical utilization, it is necessary that these complexes function unabated in the presence of atmospheric oxygen and other common contaminants in abundant water sources. There has been very little activity towards the development of oxygen-tolerant hydrogen producing catalysts. This article aims to draw attention to this issue of oxygen sensitivity in the HER and highlights the development of a few air-stable HER catalysts (enzymatic as well as artificial) elaborating the challenges involved and the techniques discovered to overcome this significant deterrent to large-scale hydrogen production by electrolysis from abundant water sources.
Collapse
Affiliation(s)
- Biswajit Mondal
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science, 2A&2B Raja S.C. Mullick Road, Jadavpur, Kolkata-700032, India.
| | | |
Collapse
|
6
|
|
7
|
Ghirardi ML. Implementation of photobiological H2 production: the O 2 sensitivity of hydrogenases. PHOTOSYNTHESIS RESEARCH 2015; 125:383-93. [PMID: 26022106 DOI: 10.1007/s11120-015-0158-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Accepted: 05/13/2015] [Indexed: 05/10/2023]
Abstract
The search for the ultimate carbon-free fuel has intensified in recent years, with a major focus on photoproduction of H2. Biological sources of H2 include oxygenic photosynthetic green algae and cyanobacteria, both of which contain hydrogenase enzymes. Although algal and cyanobacterial hydrogenases perform the same enzymatic reaction through metallo-clusters, their hydrogenases have evolved separately, are expressed differently (transcription of algal hydrogenases is anaerobically induced, while bacterial hydrogenases are constitutively expressed), and display different sensitivity to O2 inactivation. Among various physiological factors, the sensitivity of hydrogenases to O2 has been one of the major factors preventing implementation of biological systems for commercial production of renewable H2. This review addresses recent strategies aimed at engineering increased O2 tolerance into hydrogenases (as of now mainly unsuccessful), as well as towards the development of methods to bypass the O2 sensitivity of hydrogenases (successful but still yielding low solar conversion efficiencies). The author concludes with a description of current approaches from various laboratories to incorporate multiple genetic traits into either algae or cyanobacteria to jointly address limiting factors other than the hydrogenase O2 sensitivity and achieve more sustained H2 photoproduction activity.
Collapse
Affiliation(s)
- Maria L Ghirardi
- National Renewable Energy Laboratory, 15013 Denver West Pkway, Golden, CO, 80401, USA,
| |
Collapse
|
8
|
Vedha SA, Velmurugan G, Jagadeesan R, Venuvanalingam P. Insights from the computational studies on the oxidized as-isolated state of [NiFeSe] hydrogenase from D. vulgaris Hildenborough. Phys Chem Chem Phys 2015. [PMID: 26205195 DOI: 10.1039/c5cp03071d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A density functional theory study of the active site structure and features of the oxygen tolerant [NiFeSe] Hase in the oxidized as-isolated state of the enzyme D. vulgaris Hildenborough (DvH) is reported here. The three conformers reported to be present in the X-ray structure (PDB ID: ) have been studied. The novel bidentate interchalcogen ligand (S-Se) in Conf-I of the [NiFeSe] Hase reported for the first time in hydrogenases (Hase) is found to be of donor-acceptor type with an uneven η(2) L → M σ-bond. The symmetry mismatch at the sp orbital of Se and at the dz(2) orbital of Ni has been identified to be the reason for the inability of Conf-II to convert to Conf-I. NBO analysis shows that the sulfinate ligand peculiar to the state stabilizes the active site through n →π* interactions. The results reveal that the isolated oxidized state of the [NiFeSe] Hase is significantly different from the well-known [NiFe] Hase.
Collapse
Affiliation(s)
- Swaminathan Angeline Vedha
- Theoretical and Computational Chemistry Laboratory, School of Chemistry, Bharathidasan University, Tiruchirappalli-620 024, India.
| | | | | | | |
Collapse
|
9
|
Finkelmann AR, Stiebritz MT, Reiher M. Activation Barriers of Oxygen Transformation at the Active Site of [FeFe] Hydrogenases. Inorg Chem 2014; 53:11890-902. [DOI: 10.1021/ic501049z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Arndt R. Finkelmann
- Laboratorium
für Physikalische
Chemie, ETH Zürich, Valdimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Martin T. Stiebritz
- Laboratorium
für Physikalische
Chemie, ETH Zürich, Valdimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Markus Reiher
- Laboratorium
für Physikalische
Chemie, ETH Zürich, Valdimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| |
Collapse
|
10
|
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
| |
Collapse
|
11
|
[NiFe] hydrogenases: a common active site for hydrogen metabolism under diverse conditions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2013; 1827:986-1002. [PMID: 23399489 DOI: 10.1016/j.bbabio.2013.01.015] [Citation(s) in RCA: 160] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 12/06/2012] [Accepted: 01/26/2013] [Indexed: 01/05/2023]
Abstract
Hydrogenase proteins catalyze the reversible conversion of molecular hydrogen to protons and electrons. The most abundant hydrogenases contain a [NiFe] active site; these proteins are generally biased towards hydrogen oxidation activity and are reversibly inhibited by oxygen. However, there are [NiFe] hydrogenase that exhibit unique properties, including aerobic hydrogen oxidation and preferential hydrogen production activity; these proteins are highly relevant in the context of biotechnological devices. This review describes four classes of these "nonstandard" [NiFe] hydrogenases and discusses the electrochemical, spectroscopic, and structural studies that have been used to understand the mechanisms behind this exceptional behavior. A revised classification protocol is suggested in the conclusions, particularly with respect to the term "oxygen-tolerance". This article is part of a special issue entitled: metals in bioenergetics and biomimetics systems.
Collapse
|
12
|
Abou Hamdan A, Dementin S, Liebgott PP, Gutierrez-Sanz O, Richaud P, De Lacey AL, Rousset M, Bertrand P, Cournac L, Léger C. Understanding and tuning the catalytic bias of hydrogenase. J Am Chem Soc 2012; 134:8368-71. [PMID: 22540997 DOI: 10.1021/ja301802r] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
When enzymes are optimized for biotechnological purposes, the goal often is to increase stability or catalytic efficiency. However, many enzymes reversibly convert their substrate and product, and if one is interested in catalysis in only one direction, it may be necessary to prevent the reverse reaction. In other cases, reversibility may be advantageous because only an enzyme that can operate in both directions can turnover at a high rate even under conditions of low thermodynamic driving force. Therefore, understanding the basic mechanisms of reversibility in complex enzymes should help the rational engineering of these proteins. Here, we focus on NiFe hydrogenase, an enzyme that catalyzes H(2) oxidation and production, and we elucidate the mechanism that governs the catalytic bias (the ratio of maximal rates in the two directions). Unexpectedly, we found that this bias is not mainly determined by redox properties of the active site, but rather by steps which occur on sites of the proteins that are remote from the active site. We evidence a novel strategy for tuning the catalytic bias of an oxidoreductase, which consists in modulating the rate of a step that is limiting only in one direction of the reaction, without modifying the properties of the active site.
Collapse
Affiliation(s)
- Abbas Abou Hamdan
- Laboratoire de Bioénergétique et Ingénierie des Protéines, Institut de Microbiologie de la Méditerranée, CNRS and Aix-Marseille Université , 31 chemin Joseph Aiguier, 13402 Marseille Cedex 20, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
X-ray crystallographic and computational studies of the O2-tolerant [NiFe]-hydrogenase 1 from Escherichia coli. Proc Natl Acad Sci U S A 2012; 109:5305-10. [PMID: 22431599 DOI: 10.1073/pnas.1119806109] [Citation(s) in RCA: 162] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The crystal structure of the membrane-bound O(2)-tolerant [NiFe]-hydrogenase 1 from Escherichia coli (EcHyd-1) has been solved in three different states: as-isolated, H(2)-reduced, and chemically oxidized. As very recently reported for similar enzymes from Ralstonia eutropha and Hydrogenovibrio marinus, two supernumerary Cys residues coordinate the proximal [FeS] cluster in EcHyd-1, which lacks one of the inorganic sulfide ligands. We find that the as-isolated, aerobically purified species contains a mixture of at least two conformations for one of the cluster iron ions and Glu76. In one of them, Glu76 and the iron occupy positions that are similar to those found in O(2)-sensitive [NiFe]-hydrogenases. In the other conformation, this iron binds, besides three sulfur ligands, the amide N from Cys20 and one Oε of Glu76. Our calculations show that oxidation of this unique iron generates the high-potential form of the proximal cluster. The structural rearrangement caused by oxidation is confirmed by our H(2)-reduced and oxidized EcHyd-1 structures. Thus, thanks to the peculiar coordination of the unique iron, the proximal cluster can contribute two successive electrons to secure complete reduction of O(2) to H(2)O at the active site. The two observed conformations of Glu76 are consistent with this residue playing the role of a base to deprotonate the amide moiety of Cys20 upon iron binding and transfer the resulting proton away, thus allowing the second oxidation to be electroneutral. The comparison of our structures also shows the existence of a dynamic chain of water molecules, resulting from O(2) reduction, located near the active site.
Collapse
|
14
|
Yang H, Gandhi H, Shi L, Kreuzer HW, Ostrom NE, Hegg EL. Using gas chromatography/isotope ratio mass spectrometry to determine the fractionation factor for H2 production by hydrogenases. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2012; 26:61-68. [PMID: 22215579 DOI: 10.1002/rcm.5298] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hydrogenases catalyze the reversible formation of H(2), and they are key enzymes in the biological cycling of H(2). H isotopes have the potential to be a very useful tool in quantifying hydrogen ion trafficking in biological H(2) production processes, but there are several obstacles that have thus far limited the application of this tool. Here, we describe a new method that overcomes some of these barriers and is specifically designed to measure isotopic fractionation during enzyme-catalyzed H(2) evolution. A key feature of this technique is that purified hydrogenases are employed, allowing precise control over the reaction conditions and therefore a high level of precision. In addition, a custom-designed high-throughput gas chromatograph/isotope ratio mass spectrometer is employed to measure the isotope ratio of the H(2). Using our new approach, we determined that the fractionation factor for H(2) production by the [NiFe]-hydrogenase from Desulfovibrio fructosovorans is 0.273 ± 0.006. This result indicates that, as expected, protons are highly favored over deuterium ions during H(2) evolution. Potential applications of this newly developed method are discussed.
Collapse
Affiliation(s)
- Hui Yang
- Department of Biochemistry & Molecular Biology, Michigan State University, East Lansing, MI 48824-1319, USA
| | | | | | | | | | | |
Collapse
|
15
|
Abstract
The H(2)-evolving potential of [FeFe] hydrogenases is severely limited by the oxygen sensitivity of this class of enzymes. Recent experimental studies on hydrogenase from C. reinhardtii point to O(2)-induced structural changes in the [Fe(4)S(4)] subsite of the H cluster. Here, we investigate the mechanistic basis of this observation by means of density functional theory. Unexpectedly, we find that the isolated H cluster shows a pathological catalytic activity for the formation of reactive oxygen species such as O(2)(-) and HO(2)(-). After protonation of O(2)(-), an OOH radical may coordinate to the Fe atoms of the cubane, whereas H(2)O(2) specifically reacts with the S atoms of the cubane-coordinating cysteine residues. Both pathways are accompanied by significant structural distortions that compromise cluster integrity and thus catalytic activity. These results explain the experimental observation that O(2)-induced inhibition is accompanied by distortions of the [Fe(4)S(4)] moiety and account for the irreversibility of this process.
Collapse
Affiliation(s)
- Marta K. Bruska
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10 8093 Zürich, Switzerland
| | - Martin T. Stiebritz
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10 8093 Zürich, Switzerland
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zurich, Wolfgang-Pauli-Strasse 10 8093 Zürich, Switzerland
| |
Collapse
|
16
|
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]
|
17
|
Reeve HA, Lauterbach L, Ash PA, Lenz O, Vincent KA. A modular system for regeneration of NAD cofactors using graphite particles modified with hydrogenase and diaphorase moieties. Chem Commun (Camb) 2011; 48:1589-91. [PMID: 21986817 DOI: 10.1039/c1cc14826e] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pyrolytic graphite particles modified with hydrogenase and an NAD(+)/NADH cycling enzyme provide a modular heterogeneous catalyst system for regeneration of oxidised or reduced nicotinamide cofactors using H(2) and H(+) as electron source or sink. Particles can be tuned for cofactor supply under different conditions by appropriate choice of hydrogenase.
Collapse
Affiliation(s)
- Holly A Reeve
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | | | | | | | | |
Collapse
|
18
|
Lukey MJ, Roessler MM, Parkin A, Evans RM, Davies RA, Lenz O, Friedrich B, Sargent F, Armstrong FA. Oxygen-Tolerant [NiFe]-Hydrogenases: The Individual and Collective Importance of Supernumerary Cysteines at the Proximal Fe-S Cluster. J Am Chem Soc 2011; 133:16881-92. [DOI: 10.1021/ja205393w] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | - Oliver Lenz
- Department of Microbiology, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Baerbel Friedrich
- Department of Microbiology, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Frank Sargent
- College of Life Sciences, University of Dundee, Dow Street, Dundee DD1 5EH, U.K
| | | |
Collapse
|
19
|
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
| |
Collapse
|
20
|
Fontecave M, Artero V. Bioinspired catalysis at the crossroads between biology and chemistry: A remarkable example of an electrocatalytic material mimicking hydrogenases. CR CHIM 2011. [DOI: 10.1016/j.crci.2010.01.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
21
|
Goris T, Wait AF, Saggu M, Fritsch J, Heidary N, Stein M, Zebger I, Lendzian F, Armstrong FA, Friedrich B, Lenz O. A unique iron-sulfur cluster is crucial for oxygen tolerance of a [NiFe]-hydrogenase. Nat Chem Biol 2011; 7:310-8. [PMID: 21390036 DOI: 10.1038/nchembio.555] [Citation(s) in RCA: 196] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2010] [Accepted: 03/01/2011] [Indexed: 12/11/2022]
Abstract
Hydrogenases are essential for H(2) cycling in microbial metabolism and serve as valuable blueprints for H(2)-based biotechnological applications. However, most hydrogenases are extremely oxygen sensitive and prone to inactivation by even traces of O(2). The O(2)-tolerant membrane-bound [NiFe]-hydrogenase of Ralstonia eutropha H16 is one of the few examples that can perform H(2) uptake in the presence of ambient O(2). Here we show that O(2) tolerance is crucially related to a modification of the internal electron-transfer chain. The iron-sulfur cluster proximal to the active site is surrounded by six instead of four conserved coordinating cysteines. Removal of the two additional cysteines alters the electronic structure of the proximal iron-sulfur cluster and renders the catalytic activity sensitive to O(2) as shown by physiological, biochemical, spectroscopic and electrochemical studies. The data indicate that the mechanism of O(2) tolerance relies on the reductive removal of oxygenic species guided by the unique architecture of the electron relay rather than a restricted access of O(2) to the active site.
Collapse
Affiliation(s)
- Tobias Goris
- Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Berlin, Germany
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Stiebritz MT, Finkelmann AR, Reiher M. Oxygen Coordination to the Active Site of Hmd in Relation to [FeFe] Hydrogenase. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001161] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
23
|
Genorio B, Strmcnik D, Subbaraman R, Tripkovic D, Karapetrov G, Stamenkovic VR, Pejovnik S, Marković NM. Selective catalysts for the hydrogen oxidation and oxygen reduction reactions by patterning of platinum with calix[4]arene molecules. NATURE MATERIALS 2010; 9:998-1003. [PMID: 21037564 DOI: 10.1038/nmat2883] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2010] [Accepted: 09/17/2010] [Indexed: 05/30/2023]
Abstract
The design of new catalysts for polymer electrolyte membrane fuel cells must be guided by two equally important fundamental principles: optimization of their catalytic behaviour as well as the long-term stability of the metal catalysts and supports in hostile electrochemical environments. The methods used to improve catalytic activity are diverse, ranging from the alloying and de-alloying of platinum to the synthesis of platinum core-shell catalysts. However, methods to improve the stability of the carbon supports and catalyst nanoparticles are limited, especially during shutdown (when hydrogen is purged from the anode by air) and startup (when air is purged from the anode by hydrogen) conditions when the cathode potential can be pushed up to 1.5 V (ref. 11). Under the latter conditions, stability of the cathode materials is strongly affected (carbon oxidation reaction) by the undesired oxygen reduction reaction (ORR) on the anode side. This emphasizes the importance of designing selective anode catalysts that can efficiently suppress the ORR while fully preserving the Pt-like activity for the hydrogen oxidation reaction. Here, we demonstrate that chemically modified platinum with a self-assembled monolayer of calix[4]arene molecules meets this challenging requirement.
Collapse
|
24
|
Ferentinos E, Maganas D, Raptopoulou CP, Terzis A, Psycharis V, Robertson N, Kyritsis P. Conversion of tetrahedral to octahedral structures upon solvent coordination: studies on the M[(OPPh2)(SePPh2)N]2 (M = Co, Ni) and [Ni{(OPPh2)(EPPh2)N}2(dmf)2] (E = S, Se) complexes. Dalton Trans 2010; 40:169-80. [PMID: 21076739 DOI: 10.1039/c0dt00928h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The synthesis of the M[(OPPh(2))(SePPh(2))N](2), M = Co (1), Ni (2) complexes was accomplished by metathetical reactions between the corresponding M(II) salts and the deprotonated form of the dichalcogenated imidodiphosphinato ligand [(OPPh(2))(SePPh(2))N](-). X-Ray crystallography revealed a pseudo-tetrahedral MO(2)Se(2) coordination sphere, owing to the asymmetric (O,Se) nature of the chelating ligand. Slow diffusion of the coordinating solvent dimethylformamide into dichloromethane solutions of Ni[(OPPh(2))(SPPh(2))N](2) or 2, afforded the pseudo-octahedral trans-[Ni{(OPPh(2))(EPPh(2))N}(2)(dmf)(2)], E = S (3), Se (4) complexes, respectively. UV-vis spectra provided evidence that, in solution, complexes 3 and 4 revert to the corresponding pseudo-tetrahedral complexes, most likely due to the removal of the dmf molecules from the coordination sphere. The IR spectra of all complexes reflect the structural features observed by X-ray crystallography. The magnetic properties of the S = 3/2 complex 1, as well as the S = 1 complexes 2, 3 and 4, were extensively studied, and the magnitude of their g and zero-field splitting D parameters was estimated. The reported structures establish a structural transformation of tetrahedral to octahedral geometry of Ni(II) complexes bearing asymmetric imidodiphosphinate ligands, upon recrystallization from coordinating solvents. The structural correlations between the Ni(II) coordination spheres are aided by DFT and ab initio multi-configuration MCSCF calculations, which investigate the corresponding interconversion pathways. In addition, the calculations provide descriptions of the bonding interactions in the octahedral Ni(II) complexes, as well as predictions of their D values.
Collapse
Affiliation(s)
- Eleftherios Ferentinos
- Inorganic Chemistry Laboratory, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, 15771, Athens, Greece
| | | | | | | | | | | | | |
Collapse
|
25
|
Barz M, Beimgraben C, Staller T, Germer F, Opitz F, Marquardt C, Schwarz C, Gutekunst K, Vanselow KH, Schmitz R, LaRoche J, Schulz R, Appel J. Distribution analysis of hydrogenases in surface waters of marine and freshwater environments. PLoS One 2010; 5:e13846. [PMID: 21079771 PMCID: PMC2974642 DOI: 10.1371/journal.pone.0013846] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2010] [Accepted: 09/17/2010] [Indexed: 12/31/2022] Open
Abstract
Background Surface waters of aquatic environments have been shown to both evolve and consume hydrogen and the ocean is estimated to be the principal natural source. In some marine habitats, H2 evolution and uptake are clearly due to biological activity, while contributions of abiotic sources must be considered in others. Until now the only known biological process involved in H2 metabolism in marine environments is nitrogen fixation. Principal Findings We analyzed marine and freshwater environments for the presence and distribution of genes of all known hydrogenases, the enzymes involved in biological hydrogen turnover. The total genomes and the available marine metagenome datasets were searched for hydrogenase sequences. Furthermore, we isolated DNA from samples from the North Atlantic, Mediterranean Sea, North Sea, Baltic Sea, and two fresh water lakes and amplified and sequenced part of the gene encoding the bidirectional NAD(P)-linked hydrogenase. In 21% of all marine heterotrophic bacterial genomes from surface waters, one or several hydrogenase genes were found, with the membrane-bound H2 uptake hydrogenase being the most widespread. A clear bias of hydrogenases to environments with terrestrial influence was found. This is exemplified by the cyanobacterial bidirectional NAD(P)-linked hydrogenase that was found in freshwater and coastal areas but not in the open ocean. Significance This study shows that hydrogenases are surprisingly abundant in marine environments. Due to its ecological distribution the primary function of the bidirectional NAD(P)-linked hydrogenase seems to be fermentative hydrogen evolution. Moreover, our data suggests that marine surface waters could be an interesting source of oxygen-resistant uptake hydrogenases. The respective genes occur in coastal as well as open ocean habitats and we presume that they are used as additional energy scavenging devices in otherwise nutrient limited environments. The membrane-bound H2-evolving hydrogenases might be useful as marker for bacteria living inside of marine snow particles.
Collapse
Affiliation(s)
- Martin Barz
- Botanisches Institut, Christian-Albrechts-Universität, Kiel, Germany
| | | | - Torsten Staller
- Forschungs- und Technologiezentrum Westküste (FTZ) der Christian-Albrechts-Universität, Büsum, Germany
| | - Frauke Germer
- Botanisches Institut, Christian-Albrechts-Universität, Kiel, Germany
| | - Friederike Opitz
- Botanisches Institut, Christian-Albrechts-Universität, Kiel, Germany
| | - Claudia Marquardt
- Botanisches Institut, Christian-Albrechts-Universität, Kiel, Germany
| | - Christoph Schwarz
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
| | - Kirstin Gutekunst
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
| | - Klaus Heinrich Vanselow
- Forschungs- und Technologiezentrum Westküste (FTZ) der Christian-Albrechts-Universität, Büsum, Germany
| | - Ruth Schmitz
- Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität, Kiel, Germany
| | - Julie LaRoche
- Leibniz-Institute of Marine Sciences, IFM-GEOMAR, Kiel, Germany
| | - Rüdiger Schulz
- Botanisches Institut, Christian-Albrechts-Universität, Kiel, Germany
| | - Jens Appel
- School of Life Sciences, Arizona State University, Tempe, Arizona, United States of America
- * E-mail:
| |
Collapse
|
26
|
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.
Collapse
Affiliation(s)
- Maria-Eirini Pandelia
- Max-Planck-Institut für Bioanorganische Chemie, Stiftstrasse 34-36, D45470, Mülheim a.d. Ruhr, Germany
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Lenz O, Ludwig M, Schubert T, Bürstel I, Ganskow S, Goris T, Schwarze A, Friedrich B. H2 conversion in the presence of O2 as performed by the membrane-bound [NiFe]-hydrogenase of Ralstonia eutropha. Chemphyschem 2010; 11:1107-19. [PMID: 20186906 DOI: 10.1002/cphc.200901002] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
[NiFe]-hydrogenases catalyze the oxidation of H(2) to protons and electrons. This reversible reaction is based on a complex interplay of metal cofactors including the Ni-Fe active site and several [Fe-S] clusters. H(2) catalysis of most [NiFe]-hydrogenases is sensitive to dioxygen. However, some bacteria contain hydrogenases that activate H(2) even in the presence of O(2). There is now compelling evidence that O(2) affects hydrogenase on three levels: 1) H(2) catalysis, 2) hydrogenase maturation, and 3) H(2)-mediated signal transduction. Herein, we summarize the genetic, biochemical, electrochemical, and spectroscopic properties related to the O(2) tolerance of hydrogenases resident in the facultative chemolithoautotroph Ralstonia eutropha H16. A focus is given to the membrane-bound [NiFe]-hydogenase, which currently represents the best-characterized member of O(2)-tolerant hydrogenases.
Collapse
Affiliation(s)
- Oliver Lenz
- Department of Microbiology, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
28
|
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]
|
29
|
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.
Collapse
|
30
|
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.
Collapse
Affiliation(s)
- Fraser A Armstrong
- Department of Chemistry, Inorganic Chemistry Laboratory, University of Oxford, Oxford OX1 3QR, UK.
| |
Collapse
|
31
|
|
32
|
Baker SE, Hopkins RC, Blanchette CD, Walsworth VL, Sumbad R, Fischer NO, Kuhn EA, Coleman M, Chromy BA, Létant SE, Hoeprich PD, Adams MWW, Henderson PT. Hydrogen Production by a Hyperthermophilic Membrane-Bound Hydrogenase in Water-Soluble Nanolipoprotein Particles. J Am Chem Soc 2009; 131:7508-9. [DOI: 10.1021/ja809251f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sarah E. Baker
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Robert C. Hopkins
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Craig D. Blanchette
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Vicki L. Walsworth
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Rhoda Sumbad
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Nicholas O. Fischer
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Edward A. Kuhn
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Matt Coleman
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Brett A. Chromy
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Sonia E. Létant
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Paul D. Hoeprich
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Michael W. W. Adams
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| | - Paul T. Henderson
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, and Department of Biochemistry, University of Georgia
| |
Collapse
|
33
|
Hambourger M, Kodis G, Vaughn MD, Moore GF, Gust D, Moore AL, Moore TA. Solar energy conversion in a photoelectrochemical biofuel cell. Dalton Trans 2009:9979-89. [DOI: 10.1039/b912170f] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Armstrong FA, Belsey NA, Cracknell JA, Goldet G, Parkin A, Reisner E, Vincent KA, Wait AF. Dynamic electrochemical investigations of hydrogen oxidation and production by enzymes and implications for future technology. Chem Soc Rev 2008; 38:36-51. [PMID: 19088963 DOI: 10.1039/b801144n] [Citation(s) in RCA: 205] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This tutorial review describes studies of hydrogen production and oxidation by biological catalysts--metalloenzymes known as hydrogenases--attached to electrodes. It explains how the electrocatalytic properties of hydrogenases are studied using specialised electrochemical techniques and how the data are interpreted to allow assessments of catalytic rates and performance under different conditions, including the presence of O2, CO and H2S. It concludes by drawing some comparisons between the enzyme active sites and platinum catalysts and describing some novel proof-of-concept applications that demonstrate the high activities and selectivities of these 'alternative' catalysts for promoting H2 as a fuel.
Collapse
Affiliation(s)
- Fraser A Armstrong
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, UK OX1 3QR.
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Ludwig M, Cracknell JA, Vincent KA, Armstrong FA, Lenz O. Oxygen-tolerant H2 oxidation by membrane-bound [NiFe] hydrogenases of ralstonia species. Coping with low level H2 in air. J Biol Chem 2008; 284:465-477. [PMID: 18990688 DOI: 10.1074/jbc.m803676200] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Knallgas bacteria such as certain Ralstonia spp. are able to obtain metabolic energy by oxidizing trace levels of H2 using O2 as the terminal electron acceptor. The [NiFe] hydrogenases produced by these organisms are unusual in their ability to oxidize H2 in the presence of O2, which is a potent inactivator of most hydrogenases through attack at the active site. To probe the origin of this unusual O2 tolerance, we conducted a study on the membrane-bound hydrogenase from Ralstonia eutropha H16 and that of the closely related organism Ralstonia metallidurans CH34, which was purified using a new heterologous overproduction system. Direct electrochemical methods were used to determine apparent inhibition constants for O2 inhibition of H2 oxidation (K I(app)O2) for each enzyme. These values were at least 2 orders of magnitude higher than those of "standard" [NiFe] hydrogenases. Amino acids close to the active site were exchanged in the membrane-bound hydrogenase of R. eutropha H16 for those from standard hydrogenases to probe the role of individual residues in conferring O2 sensitivity. Michaelis constants for H2 (K M H2) were determined, and for some mutants these were increased more than 20-fold relative to the wild type. Mutations resulting in membrane-bound hydrogenase enzymes with increased K M H2 or decreased K I(app)O2 values were associated with impaired lithoautotrophic growth in the presence of high O2 concentrations.
Collapse
Affiliation(s)
- Marcus Ludwig
- Institut fu¨r Biologie/Mikrobiologie, Humboldt-Universita¨t zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany and the Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - James A Cracknell
- Institut fu¨r Biologie/Mikrobiologie, Humboldt-Universita¨t zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany and the Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Kylie A Vincent
- Institut fu¨r Biologie/Mikrobiologie, Humboldt-Universita¨t zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany and the Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Fraser A Armstrong
- Institut fu¨r Biologie/Mikrobiologie, Humboldt-Universita¨t zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany and the Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Oliver Lenz
- Institut fu¨r Biologie/Mikrobiologie, Humboldt-Universita¨t zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany and the Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom.
| |
Collapse
|
36
|
Koay M, Antonkine M, Gärtner W, Lubitz W. Modelling Low-Potential [Fe4S4] Clusters in Proteins. Chem Biodivers 2008; 5:1571-1587. [DOI: 10.1002/cbdv.200890145] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
37
|
Goldet G, Wait AF, Cracknell JA, Vincent KA, Ludwig M, Lenz O, Friedrich B, Armstrong FA. Hydrogen Production under Aerobic Conditions by Membrane-Bound Hydrogenases from Ralstonia Species. J Am Chem Soc 2008; 130:11106-13. [DOI: 10.1021/ja8027668] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabrielle Goldet
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Annemarie F. Wait
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - James A. Cracknell
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Kylie A. Vincent
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Marcus Ludwig
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Oliver Lenz
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Bärbel Friedrich
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| | - Fraser A. Armstrong
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom, and Institut für Biologie/Mikrobiologie, Humboldt-Universität zu Berlin, Chausseestrasse 117, 10115 Berlin, Germany
| |
Collapse
|
38
|
Léger C, Bertrand P. Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies. Chem Rev 2008; 108:2379-438. [DOI: 10.1021/cr0680742] [Citation(s) in RCA: 594] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
39
|
Cracknell JA, Vincent KA, Armstrong FA. Enzymes as Working or Inspirational Electrocatalysts for Fuel Cells and Electrolysis. Chem Rev 2008; 108:2439-61. [DOI: 10.1021/cr0680639] [Citation(s) in RCA: 846] [Impact Index Per Article: 52.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|