Recombinant Human S100A7 Protein, CF

  • Purity
    >95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
  • Endotoxin Level
    <0.10 EU per 1 μg of the protein by the LAL method.
  • Activity
    Measured by its ability to induce IL-8 secretion in A431 human epithelial carcinoma cells. The ED50 for this effect is typically 2-10 μg/mL.
  • Source
    E. coli-derived Ser2-Gln101 with an N-terminal Met
  • Accession #
  • N-terminal Sequence
    Ser2 (Major) & Met1 (Minor)
  • Predicted Molecular Mass
    11 kDa
    11 kDa, reducing conditions
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution Reconstitute at 500 μg/mL in PBS.
Shipping The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage: Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
  • 12 months from date of receipt, -20 to -70 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, -20 to -70 °C under sterile conditions after reconstitution.
Data Images

Recombinant Human S100A7 (Catalog # 9085-SA) induces IL-8secretion in A431 human epithelial carcinoma cells. The ED50 forthis effect is typically 2-10 μg/mL.

Background: S100A7
S100A7, also known as Psoriasin, is a 11-12 kDa member of the S100 family of EF hand calcium binding proteins (1). Human S100A7 shares 32% amino acid sequence identity with mouse S100A7A, the closest related protein in mouse (2). It is acetylated at the N-terminus and binds both calcium and zinc ions (3, 4). S100A7 is up-regulated in keratinocytes of psoriasis and atopic dermatitis lesions (5-9), as well as in epithelial cells of the tongue, eye, and female genital tract (10-12). Its up-regulation can be induced by bacterial exposure, inflammatory cytokines, or epidermal barrier disruption (3, 9, 11, 12). S100A7 supports epithelial integrity through killing E. coli by sequestration of zinc (3, 5) and through inducing the up-regulation of tight junction proteins (13). The interaction of S100A7 with RAGE promotes the migration of immune cells and the infiltration of macrophages into tumor sites (7, 14).
  • References:
    1. Donato, R. et al. (2013) Curr. Mol. Med. 13:24.
    2. Madsen, P. et al. (1991) J. Invest. Dermatol. 97:701.
    3. Glaser, R. et al. (2005) Nat. Immunol. 6:57.
    4. Brodersen, D.E. et al. (1999) Biochemistry 38:1695.
    5. Lee, K.C. and R.L. Eckert (2007) J. Invest. Dermatol. 127:945.
    6. Anderson, K.S. et al. (2009) Br. J. Dermatol. 160:325.
    7. Wolf, R. et al. (2008) J. Immunol. 181:1499.
    8. Al-Haddad, S. et al. (1999) Am. J. Pathol. 155:2057.
    9. Glaser, R. et al. (2009) J. Invest. Dermatol. 129:641.
    10. Meyer, J.E. et al. (2008) Mucosal Immunol. 1:239.
    11. Garreis, F. et al. (2011) Invest. Opthalmol. Vis. Sci. 52:4914.
    12. Mildner, M. et al. (2010) Mucosal Immunol. 3:602.
    13. Hattori, F. et al. (2014) Br. J. Dermatol. 171:742.
    14. Nasser, M.W. et al. (2015) Cancer Res. 75:974.
  • Long Name:
    S100 Calcium Binding Protein A7
  • Entrez Gene IDs:
    6278 (Human); 192344 (Mouse)
  • Alternate Names:
    HID 5; HID5; HID-5; protein S100-A7; PSOR1; psoriasin 1; Psoriasin; S100 calcium binding protein A7 (psoriasin 1); S100 calcium binding protein A7; S100 calcium-binding protein A7 (psoriasin 1); S100 calcium-binding protein A7; S100A7c
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