Cysteine protease that plays an important role in the inhibition of host innate immune response. Cleaves host elastins found in connective tissues, pulmonary surfactant protein A in the lungs, and the chemokine receptor CXCR2 on leukocytes. Proteolytic cleavage of surfactant protein A impairs bacterial phagocytocis by neutrophils while CXCR2 degradation blocks neutrophil activation and chemotaxis. Additionally, promotes vascular leakage by activating the plasma kallikerin/kinin system, resulting in hypotension.

Belongs to the peptidase C47 family.

388 amino acids

MKRNFPKLIALSLIFSLSVTPIANAESNSNIKAKDKKHVQVNVEDKSVPTDVRNLAQKDYLSYVTSLDKIYNKEKASYTLGEPFKIYKFNKKSDGNYYFPVLNTEGNIDYIVTISPKITKYSSSSSKYTINVSPFLSKVLNQYKDQQITILTNSKGYYVVTQNHKAKLVLKTPRLEDKKLKKTESIPTGNNVTQLKQKASVTMPTSQFKSNNYTYNEQYINKLENFKIRETQGNNGWCAGYTMSALLNATYNTNKYHAEAVMRFLHPNLQGQRFQFTGLTPREMIYFGQTQGRSPQLLNRMTTYNEVDNLTKNNKGIAVLGSRVESRNGMHAGHAMAVVGNAKLDNGQEVIIIWNPWDNGFMTQDAKNNVIPVSNGDHYRWYSSIYGY

44.2 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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