Phosphatidylinositol 3-phosphate-binding protein required for the abcission step in cytokinesis: recruited to the midbody during cytokinesis and acts as a regulator of abcission. May also be required for efficient homologous recombination DNA double-strand break repair. Interacts with AP5Z1, AP5B1, AP5S1 and SPG11. Interacts with TTC19 and KIF13A. Strongest expression in the adrenal gland, bone marrow, adult brain, fetal brain, lung, placenta, prostate, skeletal muscle, testis, thymus, and retina. Intermediate levels are detected in other structures, including the spinal cord. 4 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.