Epidermal type-II transmembrane serine protease (ECRG1), also known as TMPRSS11A, is a member of a novel esophageal cancer-related gene family. It is a type-II transmembrane serine protease which may play a role in cellular senescence. It is expressed in esophagus, liver, colon and lung. Overexpression of ECRG1 inhibits cell growth and induces G1 cell cycle arrest. It is down-regulated in esophagus cancers (EC) and might play important roles in the initiation and progression of EC.Synonyms: Airway trypsin-like protease 1, Esophageal cancer-susceptibility gene 1 protein, HATL1, HESP, TMPRSS11A