UniProt Summary: Protease inhibitor required for egg fertilization. Required to prevent premature zona pellucida hardening before fertilization, probably by inhibiting the protease activity of ASTL, a protease that mediates the cleavage of ZP2 and triggers zona pellucida hardening (By similarity). {ECO:0000250}.
Pfam DomainsGO Terms
Pfam Domains
Cystatin
GO Terms
metalloendopeptidase inhibitor activity
cysteine-type endopeptidase inhibitor activity
binding of sperm to zona pellucida
sperm-egg recognition
cell-cell recognition
single fertilization
fertilization
cell recognition
negative regulation of endopeptidase activity
negative regulation of peptidase activity
negative regulation of proteolysis
regulation of endopeptidase activity
regulation of peptidase activity
negative regulation of hydrolase activity
regulation of proteolysis
molecular function
negative regulation of catalytic activity
sexual reproduction
multi-organism reproductive process
negative regulation of cellular protein metabolic process
negative regulation of protein metabolic process
negative regulation of molecular function
regulation of hydrolase activity
reproductive process
reproduction
extracellular region
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)