. "Catalysis of the reaction: 5-methyltetrahydromethanopterin + coenzyme M = 5,6,7,8-tetrahydromethanopterin + methyl-coenzyme M. 2-(methylthio)ethanesulfonate is also known as methyl-CoM." . . . "tetrahydromethanopterin S-methyltransferase activity" . "5-methyl-5,6,7,8-tetrahydromethanopterin:2-mercaptoethanesulfonate 2-methyltransferase activity" . "N(5)-methyltetrahydromethanopterin--coenzyme M methyltransferase activity" . "N5-methyltetrahydromethanopterin--coenzyme M methyltransferase activity" . "tetrahydromethanopterin methyltransferase activity" . . . .