UniProt Summary: May play some biological role in the host defense system on the mucous membrane independently of or in cooperation with other substances in airway mucous or bronchial secretions. Plays a role in the proteolytic processing of ACE2. Proteolytically cleaves and activates the human coronavirus 229E (HCoV-229E) spike glycoprotein which facilitate virus-cell membrane fusions; spike proteins are synthesized and maintained in precursor intermediate folding states and proteolysis permits the refolding and energy release required to create stable virus-cell linkages and membrane coalescence. Preferentially cleaves the C-terminal side of arginine residues at the P1 position of certain peptides, cleaving Boc-Phe-Ser-Arg-4-methylcoumaryl-7-amide most efficiently and having an optimum pH of 8.6 with this substrate. {ECO:0000269|PubMed:23536651, ECO:0000269|PubMed:24227843}.
Pfam DomainsGO Terms
Pfam Domains
Trypsin
SEA
DUF1986
GO Terms
respiratory gaseous exchange by respiratory system
peptidase activity
serine-type endopeptidase activity
proteolysis
integral component of plasma membrane
extracellular region
CRISPR Data
Compound HitMost Correlated Genes in ChemogenomicsTissues where Essential in the Avana Dataset (DepMap 20Q1)