This is the C-terminal domain of Ubiquitin carboxyl-terminal hydrolase 47 (USP47), a ubiquitin-specific protease involved in deubiquitinating of monoubiquitinated DNA polymerase beta (Polbeta), being required for its stability and, therefore, plays a role in DNA base excision repair (BER) [1]. The C-terminal domains in USPs mediate protein- protein interactions [2].

1: USP47 is a deubiquitylating enzyme that regulates base excision repair by controlling steady-state levels of DNA polymerase beta. Parsons JL, Dianova II, Khoronenkova SV, Edelmann MJ, Kessler BM, Dianov GL; Mol Cell. 2011;41:609-615. PMID:21362556

2: Regulation of proteolysis by human deubiquitinating enzymes. Eletr ZM, Wilkinson KD; Biochim Biophys Acta. 2014;1843:114-128. PMID:23845989