O(6)-Methylguanine-DNA Methyltransferase

**Definition:** An enzyme that transfers methyl groups from O(6)-methylguanine, and other methylated moieties of DNA, to a cysteine residue in itself, thus repairing alkylated DNA in a single-step reaction. EC 2.1.1.63.

**Tree numbers:** - D08.811.913.555.500.800.650

**Synonyms:** - Guanine-O(6)-Alkyltransferase - Methylated-DNA-Protein-Cysteine S-Methyltransferase - O(6)-AGT - O(6)-Alkylguanine-DNA Alkyltransferase - O(6)-MeG-DNA Methyltransferase - O(6)-Methylguanine DNA Transmethylase - O(6)-Methylguanine Methyltransferase