As part of AP-5, a probable fifth adaptor protein complex it may be involved in endosomal transport. According to  it is a putative helicase required for efficient homologous recombination DNA double-strand break repair.
Subcellular locations: Cytoplasm, Nucleus
By SDS-PAGE, 2 isoforms have been observed, the shorter seems to be predominantly nuclear and the longer is mostly cytoplasmic.