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CAP (cysteine-rich secretory proteins, antigen 5, and pathogenesis-related 1 proteins) domain of peptidase inhibitor 15 Peptidase inhibitor 15 (PI15) is also called 25 kDa trypsin inhibitor (p25TI), cysteine-rich secretory protein 8 (CRISP-8), or SugarCrisp. It is a serine protease inhibitor which displays weak inhibitory activity against trypsin and may play a role in facial patterning during embryonic development. The PI15 gene is a candidate gene for abdominal aortic internal elastic lamina ruptures in the rat. PI15 may also participate in the regulation of drug resistance in ovarian cancer and serve as a potential target in targeted therapies. The wider family of CAP domain containing proteins includes plant pathogenesis-related protein 1 (PR-1), cysteine-rich secretory proteins (CRISPs), and allergen 5 from vespid venom, among others. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",