Tags: Chemical Compound, Chemical Substance.
S-Methylmethionine (SMM) is a derivative of methionine with the chemical formula (CH3)2S+CH2CH2CH(NH3+)CO2–. This cation is an intermediate in many biosynthetic pathways owing to the sulfonium functional group. The natural derivative S-methylmethionine is biosynthesized from L-methionine which is first converted to S-adenosylmethionine. The subsequent conversion involving replacement of the adenosyl group by a methyl group is catalyzed by the enzyme methionine S-methyltransferase.
