Required to suppress inappropriate homologous recombination, thereby playing a central role DNA repair and in the maintenance of genomic stability. Antagonizes homologous recombination by interfering with the formation of the RAD51-DNA homologous recombination structure. Binds single-strand DNA and poly(A) homopolymers. Positively regulate the poly(ADP-ribosyl)ation activity of PARP1; however such function may be indirect. Interacts with RAD51 and PCNA (PubMed:22153967). Interacts with PARP1 (PubMed:20931645). Interacts with TASOR (By similarity). Localizes to chromatin in response to S phase arrest but not in mitosis. Targeted to chromatin via its interaction with PCNA. Restricted to testis. Overexpressed in multiple cancer cells. Although it shares some sequence similarity with SRS2 yeast helicase, does not contain a functional ATPase domain suggesting it has no helicase activity. Belongs to the PARI family. Truncated N-terminus. Contaminating sequence. Potential poly-A sequence. Truncated N-terminus. Truncated N-terminus. Contaminating sequence. Potential poly-A sequence.