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Background
Methylated-DNA-protein-cysteine methytransferase (MGMT) is an enzyme that in humans is encoded by the MGMT gene. O(6)-alkylguanine is the major mutagenic and carcinogenic lesion in DNA induced by simple alkylating mutagens. MGMT gene is mapped to chromosome 10. Rydberg et al. (1990) concluded that the methyltransferase gene spans at least 15 kb. Gardner et al. (1991) refined the localization of the gene to 10q24.33-qter. Methylation of the gene's promoter plays a significant role in carcinogenesis.