Involved in DNA repair and mitotic recombination. May play an active role in recombination processes in concert with other members of the RAD52 epistasis group. Interacts with RAD51 through the NH2-terminal domain. Immunoprecipitation experiments show that the interaction is constitutive and not induced by ionizing radiation. The interaction may be indirect. Abundantly expressed in testis and spleen. Relatively low levels observed in thymus, prostate, ovary and colon. Belongs to the SNF2/RAD54 helicase family.