Tags: Enzyme.
In enzymology a methylated-DNA-[protein]-cysteine S-methyltransferase (EC 2.1.1.63) is an enzyme that catalyzes the chemical reactionDNA (containing 6-O-methylguanine) + protein L-cysteine DNA (without 6-O-methylguanine) + protein S-methyl-L-cysteineThus the two substrates of this enzyme are DNA containing 6-O-methylguanine and protein L-cysteine whereas its two products are DNA and protein S-methyl-L-cysteine.