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Recombinant Human Gas6 Protein, CF Best Seller

Catalog # 885-GSB | R&D Systems, Inc. a Bio-Techne Brand
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885-GSB-050
885-GSB-500

Key Product Details

Source

NS0

Accession #

Conjugate

Unconjugated

Applications

Bioactivity

Product Specifications

Source

Mouse myeloma cell line, NS0-derived human Gas6 protein
Ala49-Ala678, with a C-terminal 6-His tag

Purity

>90%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

Endotoxin Level

<1.0 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Ala49

Predicted Molecular Mass

70.5 kDa

SDS-PAGE

70-85 kDa, reducing conditions

Activity

Measured by its ability to down regulate the expression of Axl in DU145 human prostate carcinoma cells. Mishra, A. et al. (2012) Mol. Cancer Res. 10:703.
The ED50 for this effect is 25-150 ng/mL

Scientific Data Images for Recombinant Human Gas6 Protein, CF

Graph showing bioactivity of recombinant human GAS6

Bioactivity of Recombinant Human Gas6 protein

Recombinant Human Gas6 885-GSB down regulates the expression of Axl in DU145 human prostate carcinoma cells. The ED50 for this effect is 25-150 ng/mL.

Formulation, Preparation and Storage

885-GSB
Formulation Lyophilized from a 0.2 μm filtered solution in Tris, NaCl and Citrate.
Reconstitution
Reconstitute at 500 μg/mL in sterile water.

Reconstitution Buffer Available:
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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.

Background: Gas6

Gas6 (Growth Arrest Specific 6) is a multimodular protein that is up-regulated by a wide variety of cell types in response to growth arrest (1). Gas6 and the structurally related Protein S are vitamin K-dependent and have an extensively gamma-carboxylated N-terminal Gla domain, four EGF-like repeats, and a C-terminal region with homology to steroid hormone binding globulin (SHBG) (2). Human Gas6 is a 75 kDa protein that shares 77%-79% aa sequence identity with mouse and rat Gas6, and 43% aa identity with human protein S (over the region expressed). Alternate splicing generates isoforms that lack the Gla domain and/or the spacer between the
EGF‑like and SHBG regions. Gas6 binds and induces signaling through the receptor tyrosine kinases Axl, Dtk, and Mer (3-5). Human Gas6 interacts with both mouse and rat orthologs of these receptors (1). The full length isoform may be cleaved, resulting in release of the free SHBG region which can independently activate Axl (6). Shed soluble forms of Axl and Mer bind Gas6 and function as decoy receptors (7, 8). Gas6 induces a variety of responses, including prevention of apoptosis (9), cell proliferation (10), platelet-mediated thrombosis (11), retinal epithelial cell phagocytosis of outer rod segments (12), inhibition of VEGF-induced endothelial cell chemotaxis (13), and the differentiation and expansion of NK cell precursors (14). The affinity of Gas6 for phosphatidylserine likely contributes to its role in promoting the phagocytosis of apoptotic cells (15). Several of these effects have been shown to require gamma-carboxylation of the Gla domain (12, 16).

References

  1. Hafizi, S. and B. Dahlback (2006) FEBS J. 273:5231.
  2. Manfioletti, G. et al. (1993) Mol. Cell Biol. 13:4976.
  3. Stitt, T.N. et al. (1995) Cell 80:661.
  4. Ohashi, K. et al. (1995) J. Biol. Chem. 270:22681.
  5. Nagata, K. et al. (1996) J. Biol. Chem. 271:30022.
  6. Goruppi, S. et al. (1997) FEBS Lett. 415:59.
  7. Sather, S. et al. (2007) Blood 109:1026.
  8. Budagian, V. et al. (2005) Mol. Cell. Biol. 25:9324.
  9. Shankar, S.L. et al. (2006) J. Neurosci. 26:5638.
  10. Yanagita, M. et al. (2002) J. Clin. Invest. 110:239.
  11. Gould, W.R. et al. (2005) J. Thromb. Haemost. 3:733.
  12. Hall, M.O. et al. (2002) Exp. Eye Res. 75:391.
  13. Gallicchio, M. et al. (2005) Blood 105:1970.
  14. Caraux, A. et al. (2006) Nat. Immunol. 7:747.
  15. Wu, Y. et al. (2005) J. Cell Sci. 118:539.
  16. Hasanbasic, I. et al. (2005) J. Thromb. Haemost. 3:2790.

Long Name

Growth-arrest-specific Protein 6

Alternate Names

AXLLG

Entrez Gene IDs

2621 (Human); 14456 (Mouse)

Gene Symbol

GAS6

UniProt

Product Documents for Recombinant Human Gas6 Protein, CF

Certificate of Analysis

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Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Recombinant Human Gas6 Protein, CF

For research use only

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FAQs for Recombinant Human Gas6 Protein, CF

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  • Q: Are the NS0 cells used to raise Recombinant Human Gas6 Protein, CF (Catalog # 885-GSB) cultured in the presence of Vitamin K?

    A: Yes, the NS0 cells are cultured in the presence of Vitamin K.

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