has participant hydron S-adenosyl-L-homocysteine zwitterion S-adenosyl-L-methionine zwitterion adenosine 5'-monophosphate(1-) residue N(6)-methyladenosine 5'-monophosphate(1-) residue mRNA m(6)A methyltransferase activity https://github.com/geneontology/go-ontology/issues/27389 EC:2.1.1.348 MetaCyc:RXN-19346 GO:0001734 molecular_function mRNA (N6-adenosine)-methyltransferase activity RHEA:55584 Catalysis of the reaction: an adenosine in mRNA + S-adenosyl-L-methionine = an N(6)-methyladenosine in mRNA + H+ + S-adenosyl-L-homocysteine. This activity is the methylation of adenines in mRNA with the consensus sequence RRACH, where R is a purine, and H is C, A, or U. Reactome:R-HSA-72095 mRNA methyltransferase activity