IUBMB Enzyme Nomenclature


Accepted name: 5-methyltetrahydrosarcinapterin:corrinoid—iron-sulfur protein Co-methyltransferase

Reaction: a [methyl-Co(III) corrinoid Fe-S protein] + tetrahydrosarcinapterin = a [Co(I) corrinoid Fe-S protein] + 5-methyltetrahydrosarcinapterin

Other name(s): cdhD (gene name); cdhE (gene name)

Systematic name: 5-methyltetrahydrosarcinapterin:corrinoid/iron-sulfur protein methyltransferase

Comments: Catalyses the transfer of a methyl group from the cobamide cofactor of a corrinoid/Fe-S protein to the N5 group of tetrahydrosarcinapterin. Forms, together with EC, carbon-monoxide dehydrogenase (ferredoxin) and EC, CO-methylating acetyl-CoA synthase, the acetyl-CoA decarbonylase/synthase complex that catalyses the demethylation of acetyl-CoA in a reaction that also forms CO2. This reaction is a key step in methanogenesis from acetate.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:


1. Maupin-Furlow, J. and Ferry, J.G. Characterization of the cdhD and cdhE genes encoding subunits of the corrinoid/iron-sulfur enzyme of the CO dehydrogenase complex from Methanosarcina thermophila. J. Bacteriol. 178 (1996) 340-346. [PMID: 8550451]

2. Grahame, D.A. and DeMoll, E. Partial reactions catalyzed by protein components of the acetyl-CoA decarbonylase synthase enzyme complex from Methanosarcina barkeri. J. Biol. Chem. 271 (1996) 8352-8358. [PMID: 8626532]

[EC created 2012]

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