SERPINA encodes Alpha 1-ACT. It is an early-stage acute-phase plasma protein and a serpin that preferentially inactivates chymotrypsin, cathepsin G, and chymase. Alpha-1-ACT, a serine protease inhibitor, is tightly associated with amyloid plaques in Alzheimer's disease (AD) and in normal aged human and monkey brain. Regulation of the serine proteases and serine protease inhibitors plays an important role in neuromuscular differentiation. Prostate specific antigen (PSA), a chymotrypsin-like serine protease, is predominantly complexed to Alpha-1-ACT.
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Protein Aliases: ACT; Alpha-1-antichymotrypsin; Alpha-1-antichymotrypsin His-Pro-less; Cell growth-inhibiting gene 24/25 protein; growth-inhibiting protein 24; growth-inhibiting protein 25; MGC88254; serine (or cysteine) proteinase inhibitor, clade A, member 3; Serpin A3; serpin peptidase inhibitor, clade A (alpha-1 antiproteinase, antitrypsin), member 3
Gene Aliases: AACT; ACT; GIG24; GIG25; SERPINA3
UniProt ID: (Human) P01011
Entrez Gene ID: (Human) 12