FEATURES

FAMILY

vitamin-B12 dependent methionine synthase family

DESCRIPTION

Also known as METH_HUMAN, MTR. Catalyzes the transfer of a methyl group from methylcob(III)alamin (MeCbl) to homocysteine, yielding enzyme-bound cob(I)alamin and methionine in the cytosol (PubMed:27771510). MeCbl is an active form of cobalamin (vitamin B12) used as a cofactor for methionine biosynthesis. Cob(I)alamin form is regenerated to MeCbl by a transfer of a methyl group from 5-methyltetrahydrofolate (PubMed:27771510). The processing of cobalamin in the cytosol occurs in a multiprotein complex composed of at least MMACHC, MMADHC, MTRR (methionine synthase reductase) and MTR which may contribute to shuttle safely and efficiently cobalamin towards MTR in order to produce methionine (PubMed:27771510). Monomer (PubMed:17288554). Dimer (PubMed:17288554). Forms a multiprotein complex with MMACHC, MMADHC AND MTRR (PubMed:17288554, PubMed:27771510).

EXTERNAL LINKS

MTR

Methionine synthase

MTR

Molecular Synopsis