Methionine S-methyltransferase

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methionine S-methyltransferase
Identifiers
EC no. 2.1.1.12
CAS no. 9027-77-4
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MetaCyc metabolic pathway
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In enzymology, a methionine S-methyltransferase (EC 2.1.1.12) is an enzyme that catalyzes the chemical reaction

S-adenosyl-L-methionine + L-methionine S-adenosyl-L-homocysteine + S-methyl-L-methionine

Thus, the two substrates of this enzyme are S-adenosyl methionine and L-methionine, whereas its two products are S-adenosylhomocysteine and S-methyl-L-methionine.

This enzyme belongs to the family of transferases, specifically those transferring one-carbon group methyltransferases. The systematic name of this enzyme class is S-adenosyl-L-methionine:L-methionine S-methyltransferase. Other names in common use include S-adenosyl methionine:methionine methyl transferase, methionine methyltransferase, S-adenosylmethionine transmethylase, and S-adenosylmethionine-methionine methyltransferase. This enzyme participates in selenoamino acid metabolism. It has 2 cofactors: manganese [ citation needed ], and zinc.

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References