Enables enzyme binding activity; phosphatidylinositol phosphate binding activity; and protein self-association. Involved in execution phase of apoptosis and phagosome-lysosome fusion involved in apoptotic cell clearance. Located in early phagosome. Expressed in embryonic cell; gonad; and gonadal sheath cell. Is an ortholog of human SNX18 (sorting nexin 18) and SNX33 (sorting nexin 33).