Cell membrane; Single-pass type II membrane protein .; [Transmembrane protease serine 4 catalytic chain]: Secreted . Activated by cleavage and secreted. .
Tissue Expression
High levels in pancreatic, gastric, colorectal and ampullary cancer. Very weak expression in normal gastrointestinal and urogenital tract (PubMed:10825129). Coexpressed with ACE2 within mature enterocytes (PubMed:32404436).
Signaling_pathway
Research Areas
Function
Plasma membrane-anchored serine protease that directly induces processing of pro-uPA/PLAU into the active form through proteolytic activity . Seems to be capable of activating ENaC (By similarity).; (Microbial infection) In gut epithelial cells, facilitates human coronavirus SARS-CoV-2 infection through, at least, the cleavage of coronavirus spike glycoproteins which activates the glycoprotein for host cell entry.