منابع مشابه
Hydrogenases of Methanococcus maripaludis
The methanogens catalyze a major component of the Earth’s H2 cycle. They are especially active in anaerobic environments where they are the primary consumers of fermentatively produced H2. These strictly anaerobic Archaea have evolved unique adaptations to H2 metabolism, many of which are poorly understood. Our research examines the enzymes and pathways in H2 metabolism in methanogens, especial...
متن کاملChemistry and the hydrogenases.
The reversible reduction protons to dihydrogen: 2H+ + 2e [symbol: see text] H2 is deceptively the simplest of reactions but one that requires multistep catalysis to proceed at practical rates. How the metal-sulfur clusters of the hydrogenases catalyse this interconversion is currently the subject of extensive structural, spectroscopic and mechanistic studies of the enzymes, of synthetic assembl...
متن کاملArtificial Hydrogenases : Utilization of Redox Non - Innocent Ligands in Iron Complexes for Hydrogen Production
Here we report the synthesis and characterization of functional models of hydrogenases for electrocatalytic prouduction of hydrogen from weak acids. The complexes employ iron in bio-inspired coordination environments yielding catalysts that are fast and require very little electrochemical overpotential to support turnover. Progress Report Electrocatalysis by an Asymmetrically Disubstituted Diir...
متن کاملMetal insertion into NiFe-hydrogenases.
The synthesis and the insertion of the metallocentre of NiFe-hydrogenases is a complex process, in which seven maturation enzymes plus ATP, GTP and carbamoyl phosphate are involved. The review summarizes what is known about the properties and activities of these auxiliary proteins, and postulates a pathway along which maturation may take place.
متن کاملMolecular biology of microbial hydrogenases.
Hydrogenases (H2ases) are metalloproteins. The great majority of them contain iron-sulfur clusters and two metal atoms at their active center, either a Ni and an Fe atom, the [NiFe]-H2ases, or two Fe atoms, the [FeFe]-H2ases. Enzymes of these two classes catalyze the reversible oxidation of hydrogen gas (H2 <--> 2 H+ + 2 e-) and play a central role in microbial energy metabolism; in addition to...
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ژورنال
عنوان ژورنال: Current Opinion in Biotechnology
سال: 2010
ISSN: 0958-1669
DOI: 10.1016/j.copbio.2010.03.003