<p>This family consists exclusively of archaeal RadA protein, a homologue of bacterial RecA, eukaryotic RAD51 (<db_xref db="INTERPRO" dbkey="IPR011941"/>), and archaeal RadB (<db_xref db="INTERPRO" dbkey="IPR011939"/>). This protein is involved in DNA repair and in homologous recombination, it binds and assembles on single-stranded DNA to form a nucleoprotein filament. RadA hydrolyzes ATP in a ssDNA-dependent manner and promotes DNA strand exchange between homologous DNA molecules involved in DNA repair and recombination. The member from <taxon tax_id="53953">Pyrococcus horikoshii</taxon> contains an intein [<cite idref="PUB00015512"/>].</p>