Predicted to enable serine-type carboxypeptidase activity. Predicted to be involved in negative regulation of chaperone-mediated autophagy; proteolysis; and regulation of protein stability. Located in lysosomal membrane. Human ortholog(s) of this gene implicated in galactosialidosis and lysosomal storage disease. Orthologous to human CTSA (cathepsin A). [provided by Alliance of Genome Resources, Apr 2022]