Enables several functions, including chaperone binding activity; chloride ion binding activity; and identical protein binding activity. Involved in several processes, including aging; positive regulation of proteolysis involved in cellular protein catabolic process; and proteolysis. Located in Golgi apparatus; endoplasmic reticulum; and lysosome. Biomarker of brain ischemia; hypertension; and obesity. Human ortholog(s) of this gene implicated in Papillon-Lefevre disease and aggressive periodontitis. Orthologous to human CTSC (cathepsin C). [provided by Alliance of Genome Resources, Apr 2022]