SRP6425 Sigma-Aldrich

SERPIN A3 human

recombinant, expressed in HEK 293 cells, ≥95% (SDS-PAGE)

Synonym: AACT, ACT, GIG24, GIG25

  •  NACRES NA.32



biological source   human
recombinant   expressed in HEK 293 cells
assay   ≥95% (SDS-PAGE)
form   lyophilized
mol wt   calculated mol wt 46 kDa
  observed mol wt 55-70 kDa (DTT-reduced. Protein migrates due to glycosylation. His 23 is the predicted N-terminal.)
packaging   pkg of 10 μg
conjugate   6-His tagged (C-terminus)
UniProt accession no.   P01011
shipped in   wet ice
storage temp.   −20°C
Gene Information   human ... SERPINA3(12)


General description

Serpin A3 is also known as α-1-antichymotrypsin (ACT or AACT) gene with five exons and four introns spanning 12.8kb long, is mapped to human chromosome 14q32.13. The encoded protein is a 423 amino acid with the molecular weight of ~ 55-66kDa and it belongs to the family of serpin superfamily of protease inhibitors. Serpin A3 consists of three β sheets, eight α helices and an active site situated within a hypervariable reactive center loop (RCL).

Biochem/physiol Actions

Overexpression of SERPIN A3 leads to endometrial carcinoma (EC), Therefore targeting SERPIN A3 can be a potent therapeutic method for EC. In addition, elevated expression of SERPIN A3 expression has been observed in various types of carcinomas including breast carcinoma, hepatocellular carcinoma, prostate carcinoma and adenocarcinoma of the lung. SERPINA3 is associated with the pathogenesis of chronic obstructive pulmonary disease (COPD), Parkinson’s disease (PD), Alzheimer’s disease (AD), Stroke, Cystic Fibrosis, Cerebral Haemorrhage and Multiple System Atrophy. SERPIN A3 inhibits the activity of pancreatic chymotrypsin, leukocyte, cathepsin G, mast cell chymases, human glandular, kallikrein 2, kallikrein 3 (prostate specific antigen), pancreatic cationic elastase and an uncharacterized lung serum protease. SERPIN A3 can bind to DNA, this property is unique among the members of SERPIN family.

Physical form

Lyophilized from 0.22 μm filtered solution in 20 mM HEPES, 150 mM NaCl, pH 7.5. Normally Mannitol or Trehalose is added as protectants before lyophilization.


Centrifuge the vial prior to opening. Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 μg/mL. Do not vortex. This solution can be stored at 2-8°C for up to 1 month. For extended storage, it is recommended to store at -20°C.

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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