Predicted to enable carboxypeptidase activity and cysteine-type endopeptidase activity. Involved in negative regulation of neuron projection development; positive regulation of neural precursor cell proliferation; and positive regulation of neuron apoptotic process. Located in cell surface; extracellular space; and growth cone. Orthologous to human CTSZ (cathepsin Z). [provided by Alliance of Genome Resources, Apr 2022]