Protein
Methylcobamide:CoM methyltransferase MtaA
Organism
Methanosarcina barkeri (strain Fusaro / DSM 804)
Function
Methyltransferase involved in methanogenesis in the methanol pathway. Catalyzes the transfer of the methyl group from the methylated corrinoid protein MtaC to coenzyme M, forming the substrate for coenzyme-B sulfoethylthiotransferase. MtaC can be substituted by free cob(I)alamin in vitro.
Similarity
Belongs to the uroporphyrinogen decarboxylase family. MtbA/mtaA subfamily.
Sequence
MSEFTLKTRLLAALEGKPVDKVPVCSVTQTGIVELMDKVGAAWPEAHTNPELMAKLAIANYELSGLEAVRLPYCLTVLGEAMGCEINMGTKNRQPSVTASPYPKNLDGAVVPADLLQRNRIPAVLEAIKIVREKVGPDVPIIGGMEGPVTLASDLISVKSFMKWSIKKTDLFEQALDISAEAAIAYANAMVEAGADVIAIADPVASPDLMSPETFKQFLQSRLQKFSAGVNSVTVLHICGKVNAILSDMADCGFEGLSVEEKIGTAAEGKKIIGDRARLVGNISSPFTLLPGPIDKIKAEAKVALEGGIDVLAPGCGIAPMTPLENVKALVAARDEYYA