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Methyl-coenzyme M reductase (MCR) gamma subunit. MCR catalyzes the terminal step of methane formation in the energy metabolism of all methanogenic archaea, in which methyl-coenzyme M and coenzyme B are converted to methane and the heterodisulfide of coenzyme M and coenzyme B (CoM-S-S-CoB). MCR is a dimer of trimers, each of which consists of one alpha, one beta, and one gamma subunit, with two identical active sites containing nickel porphinoid factor 430 (F430).
Jiyao W et al.(2023). "The conserved domain database in 2023.",