Predicted to enable phosphatidylinositol-3,5-bisphosphate binding activity. Predicted to be involved in lysosome organization. Predicted to be located in Golgi apparatus; cytoplasmic vesicle; and membrane. Predicted to be active in clathrin-coated vesicle; endosome; and trans-Golgi network. Is expressed in several structures, including alimentary system; brain; eye; genitourinary system; and spinal cord. Orthologous to human CLVS1 (clavesin 1). [provided by Alliance of Genome Resources, Apr 2022]