This is ubiquitin-binding zinc finger (UBZ) domain found in DNA polymerase eta (EC:2.7.7.7). It is important in the recruitment of the polymerase to the stalled replication machinery in translesion synthesis. The UBZ domain adopts a classical C2H2 zinc-finger structure characterized by a beta-beta-alpha fold [1].

1: Structure of the ubiquitin-binding zinc finger domain of human DNA Y-polymerase eta. Bomar MG, Pai MT, Tzeng SR, Li SS, Zhou P; EMBO Rep. 2007;8:247-251. PMID:17304240