Methylamine-corrinoid protein Co-methyltransferase

Methylamine-corrinoid protein Co-methyltransferase (EC 2.1.1.248, mtmB (gene), monomethylamine methyltransferase) is an enzyme with systematic name monomethylamine:5-hydroxybenzimidazolylcobamide Co-methyltransferase.^[1]^[2]^[3] This enzyme catalyses the following chemical reaction

methylamine + [Co(I) methylamine-specific corrinoid protein]

\rightleftharpoons

[methyl-Co(III) methylamine-specific corrinoid protein] + ammonia

This enzyme is involved in methanogenesis from methylamine.

References

↑ Burke, S.A. and Krzycki, J.A. (1997). "Reconstitution of Monomethylamine:Coenzyme M methyl transfer with a corrinoid protein and two methyltransferases purified from Methanosarcina barkeri". J. Biol. Chem. 272: 16570–16577. doi:10.1074/jbc.272.26.16570. PMID 9195968.
↑ Burke, S.A., Lo, S.L. and Krzycki, J.A. (1998). "Clustered genes encoding the methyltransferases of methanogenesis from monomethylamine". J. Bacteriol. 180: 3432–3440. PMID 9642198.
↑ Krzycki, J.A. (2004). "Function of genetically encoded pyrrolysine in corrinoid-dependent methylamine methyltransferases". Curr. Opin. Chem. Biol. 8: 484–491. doi:10.1016/j.cbpa.2004.08.012. PMID 15450490.

External links

Methylamine---corrinoid protein Co-methyltransferase at the US National Library of Medicine Medical Subject Headings (MeSH)

Transferase: one carbon transferases (EC 2.1)

2.1.1: Methyl-

N-	Histamine N-methyltransferase Phenylethanolamine N-methyltransferase Amine N-methyltransferase Phosphatidylethanolamine N-methyltransferase

O-	5-hydroxyindole-O-methyltransferase/Acetylserotonin O-methyltransferase Catechol-O-methyl transferase

Homocysteine	Betaine-homocysteine methyltransferase Homocysteine methyltransferase Methionine synthase

Other	Phosphatidyl ethanolamine methyltransferase DNMT3B Histone methyltransferase Thymidylate synthase DNA methyltransferase Thiopurine methyltransferase

2.1.2: Hydroxymethyl-,
Formyl- and Related

Hydroxymethyltransferase	Serine hydroxymethyltransferase 3-methyl-2-oxobutanoate hydroxymethyltransferase

Formyltransferase	Phosphoribosylglycinamide formyltransferase Inosine monophosphate synthase

Other	Glutamate formimidoyltransferase Aminomethyltransferase

2.1.3: Carboxy-
and Carbamoyl

Carboxy	methylmalonyl-CoA carboxytransferase

Carbamoyl	Aspartate carbamoyltransferase Ornithine carbamoyltransferase Oxamate carbamoyltransferase Putrescine carbamoyltransferase 3-hydroxymethylcephem carbamoyltransferase Lysine carbamoyltransferase N-acetylornithine carbamoyltransferase

2.1.4: Amidine

Arginine:glycine amidinotransferase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases(list) EC2 Transferases(list) EC3 Hydrolases(list) EC4 Lyases(list) EC5 Isomerases(list) EC6 Ligases(list)

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