Predicted to enable phosphatidylinositol binding activity. Predicted to be involved in phosphatidylinositol phosphate biosynthetic process. Is an ortholog of C. elegans piki-1. In C. elegans, piki-1 is involved in several processes, including phagosome maturation involved in apoptotic cell clearance; phosphatidylinositol-3-phosphate biosynthetic process; and positive regulation of phagocytosis, engulfment.