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Human Vaspin / SerpinA12 Protein (His Tag)

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Human SerpinA12 Protein Product Information
Protein Construction:A DNA sequence encoding the human SERPINA12 (NP_776249.1) (Met 1-Lys 414) was expressed, with a polyhistidine tag at the C-terminus.
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 SerpinA12 Protein QC Testing
Purity:> 97 % as determined by SDS-PAGE
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:Leu 21
Molecule Mass:The recombinant human SERPINA12 consists of 405 amino acids and predictes a molecular mass of 46.5 kDa. In SDS-PAGE under reducing conditions, the apparent molecular mass of rh SERPINA12 is approximately 50-55 kDa due to glycosylation.
Formulation:Lyophilized from sterile PBS, pH 7.4
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 SerpinA12 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 SerpinA12 Protein SDS-PAGE
Human Vaspin / SerpinA12 Protein (His Tag) SDS-PAGE
Other SerpinA12 Recombinant Protein Products
Vaspin/SerpinA12 Background

Serpins are the largest and most diverse family of protease inhibitors. Most serpins control proteolytic cascades, certain serpins do not inhibit enzymes, but instead perform diverse functions such as storage (ovalbumin, in egg white), hormone carriage proteins (thyroxine-binding globulin, cortisol-binding globulin) and tumor suppressor genes (maspin). Most inhibitory serpins target chymotrypsin-like serine proteases. These enzymes are defined by the presence of a nucleophilic serine residue in their catalytic site. Some serpins inhibit other classes of protease. A number of such serpins have been shown to target cysteine proteases. These enzymes differ from serine proteases in that they are defined by the presence of a nucleophilic cysteine residue, rather than a serine residue, in their catalytic site.
SerpinA12, also known as OL-64, Visceral adipose tissue-derived serine protease inhibitor, Vaspin, Visceral adipose-specific serpin and SERPINA12, is a secreted protein which belongs to the serpin family. SerpinA12 / Vaspin is expressed in visceral adipose tissues. It may modulates insulin action conceivably only in the presence of its yet undefined target proteases in white adipose tissues. SerpinA12 / Vaspin may be the compensatory molecule in the pathogenesis of metabolic syndrome and SerpinA12 / Vaspin recombinant protein or vaspin-mimicking agents such as vaspin analogs, antibodies or small molecule agents may be the link to drug discovery and development.

Human Vaspin/SerpinA12 References
  • Han X, et al., 1998, Proc Natl Acad Sci. USA. 95: 9250-5.
  • Han X, et al., 2000, Blood 96: 3049-55.
  • Irving JA, et al.,2000, Genome Res. 10 (12): 1845-64.
  • Irving J, et al.,2002, Mol Biol Evol. 19 (11): 1881-90.
  • Rawlings ND, et al.,2004, Biochem J. 378 (Pt 3): 705-16.
  • Water N, et al., 2004, Br J Haematol. 127:190-4.
  • Wei Z, et al., 2009, Blood 114 (17): 3662-7.
  • Whisstock JC, et al.,2010, J Biol Chem. 285 (32): 24307-12.
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    Catalog: 11822-H08H-50
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