NCIt definition : S-adenosylmethionine synthase isoform type-1 (395 aa, 44 kDa) is encoded by the human
MAT1A gene. This protein is involved in catalyzing the transfer of the adenosyl moiety
of ATP to methionine, which yields S-adenosylmethionine, diphosphate (PPi) and phosphate
(Pi).;
NCIt note : Endogenous S-adenosylmethionine synthase isoform type-1 occurs as a homotetramer (MAT-I)
and a homodimer (MAT-III).;