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Information on EC 1.12.98.4 - sulfhydrogenase

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IUBMB Comments
An iron-sulfur protein. The enzyme from the hyperthermophilic archaeon Pyrococcus furiosus is part of two heterotetrameric complexes where the beta and gamma subunits function as sulfur reductase and the alpha and delta subunits function as hydrogenases (EC 1.12.1.3, hydrogen dehydrogenase [NADP+] and EC 1.12.1.4, hydrogen dehydrogenase [NAD(P)+], respectively). Sulfur can also be used as substrate, but since it is insoluble in aqueous solution and polysulfide is generated abiotically by the reaction of hydrogen sulfide and sulfur, polysulfide is believed to be the true substrate .
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The expected taxonomic range for this enzyme is: Archaea, Bacteria
Reaction Schemes
Synonyms
H-II, H2:sulfuroxidoreductase complex, hydrogenase II, NiFe sulfhydrogenase, polysulfide dehydrogenase, polysulfide reductase, reductase, sulfur, SH2ase, sulfhydrogenase, sulfur reductase, more
REACTION
REACTION DIAGRAM
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UNIPROT
LITERATURE
H2 + (sulfide)n = hydrogen sulfide + (sulfide)n-1
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