H2TH domain
The two DNA-binding motifs ( a zinc finger and the H2TH ( helix-two-turns-helix ) motifs ) suggest that the oxidised base is flipped out from double-stranded DNA in the binding mode and excised by a catalytic mechanism similar to that of bifunctional base excision repair enzymes . 
<triplet> zinc finger <subj> motif <obj> instance of <triplet> enzymes <subj> catalytic mechanism <obj> molecular function