The molecule is a zwitterionic tautomer of S-adenosyl-L-methionine arising from shift of the proton from the carboxy group to the amino group. It has a role as a cofactor. It is a sulfonium compound and an organic cation. It is a tautomer of a S-adenosyl-L-methionine.
(2S)-4-[[(2S,3S,4R,5R)-5-(6-aminopurin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl-methylsulfonio]-2-azaniumylbutanoate