function:May act as a regulator of proteasome.,
[Isoform 1]: Cytoplasm . Nucleus . Chromosome . Nuclear localization may depend upon interaction with XRCC5/Ku80 and XRCC6/Ku70 heterodimer (PubMed:24610814). Localizes to DNA damage sites (PubMed:27063109). .; [Isoform 3]: Cytoplasm . Some nuclear localization may be due to passive diffusion. .; [Isoform 4]: Cytoplasm . Nucleus . Nuclear localization may depend upon interaction with XRCC5/Ku80 and XRCC6/Ku70 heterodimer and increases upon etoposide treatment. .