Involved in DNA double-strand break (DBS) repair via homologous recombination (HR). Recruited at DSB sites independently of BRCA2, RAD51 and RAD51 paralogs in a H2AX-dependent manner. May regulate osteoblast proliferation and differentiation (PubMed:23754376). May play a role in the control of male meiosis dynamic (By similarity). ATP + H2O = ADP + H(+) + phosphate Hexamer (By similarity). Interacts (via N-terminal one-half region) with RAD51; the interaction is direct. Interacts (via N-terminal one-half region) with SPIDR (via the C-terminal region); the interaction is direct. Together with RAD51 and a subset of H2A histone proteins, redistributed in discrete nuclear DNA damage-induced foci after ionizing radiation (IR) treatment (PubMed:23754376). The N-terminus is necessary for its recruitment to DNA damage sites. Belongs to the AAA ATPase family.