catalytic activity:ATP + L-methionine + H(2)O = phosphate + diphosphate + S-adenosyl-L-methionine.,cofactor:Binds 1 potassium ion per subunit.,cofactor:Binds 2 divalent ions per subunit. Magnesium or cobalt.,function:Catalyzes the formation of S-adenosylmethionine from methionine and ATP.,pathway:Amino-acid biosynthesis; S-adenosyl-L-methionine biosynthesis; S-adenosyl-L-methionine from L-methionine: step 1/1.,PTM:The alpha' subunit is a post-translationally modified version of MAT2A.,similarity:Belongs to the AdoMet synthetase family.,subunit:Heterotetramer composed of 2 catalytic alpha subunits (alpha and alpha') (MAT2A) and 1 copy of beta subunit (MAT2B).,
cytosol,methionine adenosyltransferase complex,
Detected in kidney.
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