16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase (EC 2.1.1.182 S-adenosylmethionine-6-N’N’-adenosyl (rRNA) dimethyltransferase KsgA ksgA methyltransferase) is an enzyme with system name S-adenosyl-L-methionine:16S rRNA (adenine1518-N6/adenine1519-N6)-dimethyltransferase.