MetaCyc Reaction:

Superclasses: Reactions Classified By Conversion TypeSimple ReactionsChemical ReactionsProtein-Modification Reactions
Reactions Classified By SubstrateMacromolecule ReactionsProtein-ReactionsProtein-Modification Reactions

EC Number:

Enzymes and Genes:

Methanosarcina barkeri: methylated [methylamine-specific corrinoid protein]:coenzyme M methyltransferaseInferred from experiment: mtbA

In Pathway: methanogenesis from trimethylamine

Note that this reaction equation differs from the official Enzyme Commission reaction equation for this EC number, which can be found here .

The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the Enzyme Commission system.

Most BioCyc compounds have been protonated to a reference pH value of 7.3. Please see the PGDB Concepts Guide for more information.

Mass balance status: Balanced.

Enzyme Commission Primary Name: [methyl-Co(III) methylamine-specific corrinoid protein]:coenzyme M methyltransferase

Enzyme Commission Synonyms: methyltransferase 2 (ambiguous), MT2 (ambiguous), MT2-A, mtbA (gene name)

Standard Gibbs Free Energy (ΔrG in kcal/mol): 30.793365Inferred by computational analysis [Latendresse13]

Enzyme Commission Summary:
Contains zinc [LeClerc96]. The enzyme, which is involved in methanogenesis from mono-, di-, and trimethylamine, catalyses the transfer of a methyl group bound to the cobalt cofactor of several corrinoid proteins (mono-, di-, and trimethylamine-specific corrinoid proteins (cf. EC, methylamine—corrinoid protein Co-methyltransferase, EC, dimethylamine—corrinoid protein Co-methyltransferase, and EC, trimethylamine—corrinoid protein Co-methyltransferase) to coenzyme M, forming the substrate for EC, coenzyme-B sulfoethylthiotransferase, the enzyme that catalyses the final step in methanogenesis.

Citations: [Burke95, Ferguson97, Burke98, Ferguson00]

Gene-Reaction Schematic

Gene-Reaction Schematic

Relationship Links: BRENDA:EC:, ENZYME:EC:, IUBMB-ExplorEnz:EC:


Burke95: Burke SA, Krzycki JA (1995). "Involvement of the "A" isozyme of methyltransferase II and the 29-kilodalton corrinoid protein in methanogenesis from monomethylamine." J Bacteriol 177(15);4410-6. PMID: 7635826

Burke98: Burke SA, Lo SL, Krzycki JA (1998). "Clustered genes encoding the methyltransferases of methanogenesis from monomethylamine." J Bacteriol 180(13);3432-40. PMID: 9642198

Ferguson00: Ferguson DJ, Gorlatova N, Grahame DA, Krzycki JA (2000). "Reconstitution of dimethylamine:coenzyme M methyl transfer with a discrete corrinoid protein and two methyltransferases purified from Methanosarcina barkeri." J Biol Chem 275(37);29053-60. PMID: 10852929

Ferguson97: Ferguson DJ, Krzycki JA (1997). "Reconstitution of trimethylamine-dependent coenzyme M methylation with the trimethylamine corrinoid protein and the isozymes of methyltransferase II from Methanosarcina barkeri." J Bacteriol 179(3);846-52. PMID: 9006042

Latendresse13: Latendresse M. (2013). "Computing Gibbs Free Energy of Compounds and Reactions in MetaCyc."

LeClerc96: LeClerc GM, Grahame DA (1996). "Methylcobamide:coenzyme M methyltransferase isozymes from Methanosarcina barkeri. Physicochemical characterization, cloning, sequence analysis, and heterologous gene expression." J Biol Chem 1996;271(31);18725-31. PMID: 8702528

Report Errors or Provide Feedback
Please cite the following article in publications resulting from the use of MetaCyc: Caspi et al, Nucleic Acids Research 42:D459-D471 2014
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