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Alpha 1-antichymotrypsin (α1AC)[1] is an alpha globulin glycoprotein that is a member of the serpin superfamily. In humans, it is encoded by the SERPINA3 gene.
Alpha 1-antichymotrypsin inhibits the activity of certain enzymes called proteases, such as cathepsin G that is found in neutrophils, and chymases found in mast cells, by cleaving them into a different shape or conformation. This activity protects some tissues, such as the lower respiratory tract, from damage caused by proteolytic enzymes.[2]
This protein is produced in the liver, and is an acute phase protein that is induced during inflammation.
Deficiency of this protein has been associated with liver disease. Mutations have been identified in patients with Parkinson disease and chronic obstructive pulmonary disease.[3]
Alpha 1-antichymotrypsin is also associated with the pathogenesis of Alzheimer's disease as it enhances the formation of amyloid-fibrils in this disease.[2]
Alpha 1-antichymotrypsin has been shown to interact with DNAJC1.[4]
Metabolism, X-ray crystallography, Protein folding, Biochemistry, Glycolysis
Dna, Eukaryote, Rna, Chromosome, Gene expression
Gene, Protein, Serpin, Medicine, Alpha 1-antitrypsin
Gene, Calcium, Sodium, Muc1, Saliva
University of Cambridge, Protein data bank, Serine protease, Antithrombin, Thyroxine-binding globulin
Coagulation, Blood plasma, Heparin cofactor II, Protein, Alpha 1-antichymotrypsin
Protein, Gene, Serpin, Medical Subject Headings, Alpha 1-antichymotrypsin
Protein, Mucin, Pregnancy, Thyroid, Alpha 1-antichymotrypsin