methionine adenosyltransferase activity https://github.com/geneontology/go-ontology/issues/30193 MetaCyc:S-ADENMETSYN-RXN RHEA:21080 methionine-activating enzyme EC:2.5.1.6 S-adenosylmethionine synthase activity molecular_function AdoMet synthetase activity S-adenosylmethionine synthetase activity Reactome:R-HSA-5603087 ATP-methionine adenosyltransferase activity Catalysis of the reaction: ATP + L-methionine + H2O = phosphate + diphosphate + S-adenosyl-L-methionine. Reactome:R-HSA-5603114 methionine S-adenosyltransferase activity GO:0004478 Reactome:R-HSA-174391 ATP:L-methionine S-adenosyltransferase activity S-adenosyl-L-methionine synthetase activity adenosylmethionine synthetase activity transferase activity, transferring alkyl or aryl (other than methyl) groups