The function of Ensembl gene identifier ENSG00000196810 (CTBP1-DT, CTBP1 divergent transcript) is as follows. Promotes DNA damage repair through both homologous recombination repair (HRR) and post-replication repair (PRR) mechanisms (PubMed:35849344). Enhances the retention of DNA damage response protein RAD18 at sites of DNA damage (PubMed:35849344). This allows for HRR via association of RAD18 with RAD51C and for PRR via RAD18-mediated promotion of PCNA monoubiquitination (PubMed:35849344). .