Enables kininogen binding activity; peptidase activity; and peptide binding activity. Involved in several processes, including autophagic cell death; reproductive structure development; and response to odorant. Located in several cellular components, including external side of plasma membrane; microvillus; and perikaryon. Colocalizes with apical part of cell and secretory granule. Used to study hepatocellular carcinoma. Biomarker of several diseases, including brain ischemia; hyperthyroidism; muscular atrophy; otitis media; and pancreatitis. Human ortholog(s) of this gene implicated in hypertrophic cardiomyopathy. Orthologous to several human genes including CTSV (cathepsin V). [provided by Alliance of Genome Resources, Apr 2022]