ID 2.1.1.63 DE methylated-DNA--[protein]-cysteine S-methyltransferase. AN 6-O-methylguanine-DNA methyltransferase. AN O-6-methylguanine-DNA-alkyltransferase. CA (1) a 6-O-methyl-2'-deoxyguanosine in DNA + L-cysteinyl-[protein] = CA a 2'-deoxyguanosine in DNA + S-methyl-L-cysteinyl-[protein]. CA (2) a 4-O-methyl-thymidine in DNA + L-cysteinyl-[protein] = a thymidine CA in DNA + S-methyl-L-cysteinyl-[protein]. CC -!- This protein is involved in the repair of methylated DNA. CC -!- Unlike EC 3.2.2.20 and EC 3.2.2.21, which remove the methylated base CC leaving an apurinic/apyrimidinic site, this enzyme transfers the CC methyl group from the methylated DNA to an internal cysteine residue, CC leaving an intact nucleotide. CC -!- Since the methyl transfer is irreversible, the enzyme can only CC catalyze a single turnover. DR P19220, ADAB_BACSU ; P06134, ADA_ECOLI ; P26189, ADA_SALTY ; DR P29177, MGMT_BOVIN ; Q5A0Y8, MGMT_CANAL ; Q6FNR0, MGMT_CANGA ; DR Q6TDU1, MGMT_CANLF ; P26186, MGMT_CRIGR ; Q6BVY4, MGMT_DEBHA ; DR P16455, MGMT_HUMAN ; Q6CPW2, MGMT_KLULA ; A5E7M8, MGMT_LODEL ; DR Q5UNU9, MGMT_MIMIV ; P26187, MGMT_MOUSE ; A3LZM4, MGMT_PICST ; DR P24528, MGMT_RAT ; A6ZXD3, MGMT_YEAS7 ; P26188, MGMT_YEAST ; DR O27970, OGT_ARCFU ; P11742, OGT_BACSU ; P0AFH0, OGT_ECOLI ; DR P44687, OGT_HAEIN ; Q8TI34, OGT_METAC ; Q46EW4, OGT_METBF ; DR Q58924, OGT_METJA ; Q8TZ11, OGT_METKA ; Q8PY44, OGT_METMA ; DR A4YH39, OGT_METS5 ; O26715, OGT_METTH ; C9RE37, OGT_METVM ; DR P0A697, OGT_MYCBO ; P52982, OGT_MYCLE ; Q9ZET8, OGT_MYCPA ; DR P9WJW4, OGT_MYCTO ; P9WJW5, OGT_MYCTU ; Q9V1N7, OGT_PYRAB ; DR O93728, OGT_PYRAE ; Q8TZV2, OGT_PYRFU ; O59499, OGT_PYRHO ; DR F4HK38, OGT_PYRSN ; Q97VW7, OGT_SACS2 ; P0A2U1, OGT_SALTI ; DR P0A2U0, OGT_SALTY ; P0AFH1, OGT_SHIFL ; Q4J9C6, OGT_SULAC ; DR C3N1B4, OGT_SULIA ; C4KKV8, OGT_SULIK ; C3MKT6, OGT_SULIL ; DR C3MUC6, OGT_SULIM ; C3NMY2, OGT_SULIN ; C3N9B4, OGT_SULIY ; DR Q973C7, OGT_SULTO ; F0LIT8, OGT_THEBM ; C5A3L5, OGT_THEGJ ; DR O74023, OGT_THEKO ; C6A382, OGT_THESM ; //