Tags: Enzyme.
In enzymology a methionine S-methyltransferase (EC 2.1.1.12) is an enzyme that catalyzes the chemical reactionS-adenosyl-L-methionine + L-methionine S-adenosyl-L-homocysteine + S-methyl-L-methionineThus 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.