Predicted to enable hydrolase activity, acting on glycosyl bonds and mannose binding activity. Acts upstream of or within lysosome organization and visual perception. Located in lysosome and vacuolar lumen. Is expressed in several structures, including central nervous system; genitourinary system; liver; retina; and spleen. Used to study neuronal ceroid lipofuscinosis 5. Human ortholog(s) of this gene implicated in neuronal ceroid lipofuscinosis 5. Orthologous to human CLN5 (CLN5 intracellular trafficking protein). [provided by Alliance of Genome Resources, Apr 2022]