Predicted to enable cysteine-type endopeptidase inhibitor activity and protein homodimerization activity. Predicted to be involved in inhibition of cysteine-type endopeptidase activity; negative regulation of microglial cell activation; and positive regulation of myelination. Predicted to be located in multivesicular body. Predicted to be active in several cellular components, including Golgi apparatus; late endosome; and lysosome. Orthologous to human CST7 (cystatin F). [provided by Alliance of Genome Resources, Apr 2022]