Subcellular location [CC] | Nucleus {ECO:0000269|PubMed:12606586, ECO:0000269|PubMed:16357261, ECO:0000269|PubMed:22801543, ECO:0000269|PubMed:24553286}. Note=Binding to ubiquitinated PCNA mediates colocalization to replication foci during DNA replication and persists at sites of stalled replication forks following UV irradiation (PubMed:12606586, PubMed:16357261, PubMed:24553286). After UV irradiation, recruited to DNA damage sites within 1 hour, to a maximum of about 80%; this recruitment may not be not restricted to cells active in DNA replication (PubMed:22801543). Colocalizes with TRAIP to nuclear foci (PubMed:24553286). {ECO:0000269|PubMed:12606586, ECO:0000269|PubMed:16357261, ECO:0000269|PubMed:22801543, ECO:0000269|PubMed:24553286}. |