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Human SerpinA3 / AACT Protein (His Tag)

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Human SerpinA3 Protein Product Information
Synonym:SERPINA3, AACT, ACT, GIG24, GIG25, MGC88254
Protein Construction:A DNA sequence encoding the human SERPINA3 (NP_001076.2) (Met 1-Ala 423) was expressed, with a C-terminal polyhistidine tag.
Expressed Host:Human Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Human SerpinA3 Protein QC Testing
Purity:> 97 % as determined by SDS-PAGE
Bio-Activity:Measured by its ability to inhibit trypsin cleavage of a fluorogenic peptide substrate, Mca-RPKPVE-Nval-WRK(Dnp)-NH2 (Anaspec, Catalog# 27114). The IC50 value is < 5 nM.
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:Asn 26
Molecule Mass:The recombinant human SERPINA3 consisting of 409 amino acids and has a calculated molecular mass of 46.5 kDa. As a result of different glycosylation, the apparent molecular mass of the recombinant protein is approximately 45 kDa and 55-70 kDa in SDS-PAGE under reducing conditions.
Formulation:Lyophilized from sterile 25mM HEPES, 0.15M NaCl, pH 7.8
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Human SerpinA3 Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Human SerpinA3 Protein SDS-PAGE
Human SerpinA3 / AACT Protein (His Tag) SDS-PAGE
Other SerpinA3 Recombinant Protein Products
SerpinA3 Background

Human SerpinA3, also known as Alpha 1-antichymotrypsin (AACT), is a plasma alpha globulin glycoprotein, and is a member of serpin superfamily of the serine protease inhibitors consisting of at least 35 members. SerpinA3 has been demonstrated to inhibit the activity of certain serine proteases, such as cathepsin G found in neutrophils, and chymases present in mast cells, by inducing a major conformational rearrangement, and thus protects some tissues from damage caused by proteolytic enzymes. This enzyme is produced primarily in the liver, and is identified as an acute-phase inflammatory protein. SerpinA3 deficiency has been associated with liver disease, and mutations of this gene have been observed in patients with Parkinson disease and chronic obstructive pulmonary disease. In addition, ACT gene polymorphism has been implicated with Alzheimer’s disease (AD), cerebral amyloid angiopathy (CAA), as well as stroke, since SerpinA3 is a major constituent of the plaques in AD and an inhibitor of amyloid beta peptide degradation.

Human SerpinA3 References
  • Nilsson, L.N. et al., 2001, J. Neurosci. 21: 1444-1451.
  • Ikari, Y. et al., 2001, J. Biol. Chem. 276: 11798-11803.
  • Vila, N. et al., 2000, Stroke. 31: 2103-2105
  • Eriksson, S. et al., 1995, Proc. Natl. Acad. Sci. USA. 92: 2313-2317.
  • Skeel, A. et al., 2001, J. Biol. Chem. 276: 21932-21937.
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    Catalog: 10307-H08H-10
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