Predicted to enable ceramide binding activity; enzyme binding activity; and phosphatidylinositol bisphosphate binding activity. Predicted to be involved in several processes, including negative regulation of macromolecule metabolic process; regulation of lysosomal membrane permeability; and regulation of lysosome organization. Predicted to be located in several cellular components, including endosome; lysosome; and plasma membrane. Predicted to be active in lysosomal membrane. Is expressed in several structures, including central nervous system; incisor; liver; retina; and submandibular gland primordium. Orthologous to human LAPTM4B (lysosomal protein transmembrane 4 beta). [provided by Alliance of Genome Resources, Apr 2022]