RPA1 (RPA70) is SUMOylated at lysine-449 and lysine-577 with SUMO2,3 (Dou et al. 2010, Tammsalu et al. 2014). SUMOylation of RPA1 recruits RAD51 to sites of DNA damage to initiate repair through homologous recombination.
SUMO transferase activity of UBE2I:SUMO2,UBE2I:SUMO3 [nucleoplasm]