Has a role in regulating DNA replication complexes. Acts as a regulator of post DNA replication initiation. Associates with chromatin during G1 and S phases of mitosis. Required for the transcriptional repression of the outer repeats of the centromeric region. Acts as a polymerase alpha replication accessory factor and is important for S-phase DNA damage survival. Plays a role in lagging-strand synthesis and Ozaki fragment processing; in addition to DNA repair. {ECO:0000269|PubMed:12455694; ECO:0000269|PubMed:15643072; ECO:0000269|PubMed:15915339; ECO:0000269|PubMed:16997270}.