The presence of 8-oxoguanine residues in DNA can give rise to G-C to T-A transversion mutations. This enzyme is found in archaeal, bacterial and eukaryotic species, and is specifically responsible for the process which leads to the removal of 8-oxoguanine residues. It has DNA glycosylase activity (EC:3.2.2.23) and DNA lyase activity (EC:4.2.99.18) [1]. The region featured in this family is the N-terminal domain, which is organised into a single copy of a TBP-like fold. The domain contributes residues to the 8-oxoguanine binding pocket [2].

1: Structural basis for recognition and repair of the endogenous mutagen 8-oxoguanine in DNA. Bruner SD, Norman DP, Verdine GL; Nature 2000;403:859-866. PMID:10706276

2: Reciprocal "flipping" underlies substrate recognition and catalytic activation by the human 8-oxo-guanine DNA glycosylase. Bjoras M, Seeberg E, Luna L, Pearl LH, Barrett TE; J Mol Biol 2002;317:171-177. PMID:11902834