Enables cysteine-type endopeptidase inhibitor activity. Involved in positive regulation of vitellogenesis; regulation of oocyte development; and regulation of protein processing. Located in extracellular space and yolk granule. Expressed in hypodermis; pharyngeal gland cell; and pharyngeal muscle cell. Human ortholog(s) of this gene implicated in several diseases, including Alzheimer's disease; CST3-related cerebral amyloid angiopathy; artery disease (multiple); and autoimmune disease of the nervous system (multiple). Is an ortholog of several human genes including CST1 (cystatin SN); CST2 (cystatin SA); and CST3 (cystatin C).
Sequence connection from [Hashmi S, Lustigan S], [krb 020711]
Map position created from combination of previous interpolated map position (based on known location of sequence) and allele information. Therefore this is not a genetic map position based on recombination frequencies or genetic experiments. This was done on advice of the CGC.