Crystal structure of a suicidal DNA repair protein: the Ada O6-methylguanine-DNA methyltransferase from E. coli.
Moore, M.H., Gulbis, J.M., Dodson, E.J., Demple, B., Moody, P.C.(1994) EMBO J 13: 1495-1501
- PubMed: 8156986 
- Primary Citation of Related Structures:  
1SFE - PubMed Abstract: 
The mutagenic and carcinogenic effects of simple alkylating agents are mainly due to methylation at the O6 position of guanine in DNA. O6-methylguanine directs the incorporation of either thymine or cytosine without blocking DNA replication, resulting in GC to AT transition mutations ...