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Methyl-coenzyme M reductase I subunit alpha

UniProtKB accession:  P11558
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Go to UniProtKB:  P11558
UniProtKB description:  Component of the methyl-coenzyme M reductase (MCR) I that catalyzes the reductive cleavage of methyl-coenzyme M (CoM-S-CH3 or 2-(methylthio)ethanesulfonate) using coenzyme B (CoB or 7-mercaptoheptanoylthreonine phosphate) as reductant which results in the production of methane and the mixed heterodisulfide of CoB and CoM (CoM-S-S-CoB). This is the final step in methanogenesis (PubMed:2269306, PubMed:27140643, PubMed:3350018). Neither N-6-mercaptohexanoylthreonine phosphate (H-S-HxoTP) nor N-8-mercaptooctanoylthreonine phosphate (H-SOcoTP) nor any other thiol compound such as CoA or CoM can substitute for CoB as the electron donor (PubMed:3350018).
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