Recombinant Human EphA3 Fc Chimera Protein, CF

R&D Systems, part of Bio-Techne | Catalog # 6444-A3

R&D Systems, part of Bio-Techne
Catalog #
Availability
Size / Price
Qty
6444-A3-050
Print Quote
Bulk Order
100% Guarantee

Key Product Details

Source

NS0

Accession #

NP_005224

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

View all EphA3 Proteins and Enzymes »

Product Specifications

Source

Mouse myeloma cell line, NS0-derived human EphA3 protein
Human EphA3
(Met1 - Gln541)
Accession # NP_005224
 IEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus

Purity

>95%, by SDS-PAGE under reducing conditions and visualized by silver stain.

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

N-terminal Sequence Analysis

Glu21

Predicted Molecular Mass

85.4 kDa (monomer)

SDS-PAGE

100-110 kDa, reducing conditions

Activity

Measured by its binding ability in a functional ELISA.

When Recombinant Human (rh) EphA3 Fc Chimera is coated at 2 μg/mL (100 μL/well), the concentration of biotinylayed rhEphrin A5 Fc Chimera that produces 50% of the optimal binding response is found to be approximately 5 ‑ 25 ng/mL.

Formulation, Preparation and Storage

6444-A3
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution
Reconstitute at 100 μg/mL in PBS.

Reconstitution Buffer Available:
Size / Price
Qty
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: EphA3

EphA3, also known as Cek4, Mek4, Hek, Tyro4, and Hek4, is a 135 kDa glycosylated member of the transmembrane Eph receptor tyrosine kinase family. The A and B classes of Eph proteins are distinguished by Ephrin ligand binding preference but have a common structural organization. EphA3 preferentially binds to Ephrin-A5. Eph-Ephrin interactions are widely involved in the regulation of cell migration, tissue morphogenesis, and cancer progression (1, 2). The 521 amino acid (aa) extracellular domain (ECD) of human EphA3 contains an N-terminal Ephrin binding region, a cysteine-rich region, and two fibronectin type II domains. The 418 aa cytoplasmic domain contains the tyrosine kinase domain and a sterile alpha motif (SAM) (3, 4). Within the ECD, human EphA3 shares 96% aa sequence identity with mouse and rat EphA3. Alternate splicing generates a secreted isoform that consists of nearly the entire ECD. EphA3 is expressed in the developing forebrain, retinal axons, some spinal cord motor neurons, and the heart where it plays an important role in axonal repulsion and organ morphogenesis (5 - 8). It is upregulated on some hematopoietic and solid tumor cells and on astrocytes surrounding injured nervous tissue (3, 5, 9 - 11). EphA3 ligation inhibits cellular adhesion to fibronectin as well as cellular migration (9, 10). Transmembrane EphA3 associates in cis with ADAM10 which then promotes the cleavage in trans of Ephrin-A5 (12). It also associates in cis with Ephrin-A5 on retinal axons, thereby preventing the activation of EphA3 by Ephrin-A (13). Multiple tyrosine residues within the cytoplasmic region of EphA3 become phosphorylated during ligand-induced signaling (14, 15).

References

  1. Pasquale, E.B. (2005) Nat. Rev. Mol. Cell Biol. 6:462.
  2. Merlos-Suarez, A. and E. Batlle (2008) Curr. Opin. Cell Biol. 20:194.
  3. Wicks, I.P. et al. (1992) Proc. Natl. Acad. Sci. 89:1611.
  4. Lackmann, M. et al. (1998) J. Biol. Chem. 273:20228.
  5. Chiari, R. et al. (2000) Cancer Res. 60:4855.
  6. Kudo, C. et al. (2005) J. Comp. Neurol. 487:255.
  7. Kilpatrick, T.J. et al. (1996) Mol. Cell. Neurosci. 7:62.
  8. Stephen, L.J. et al. (2007) Dev. Biol. 302:66.
  9. Smith, L.M. et al. (2004) Exp. Cell Res. 292:295.
  10. Clifford, N. et al. (2008) J. Cell. Biochem. 105:1250.
  11. Irizarry-Ramirez, M. et al. (2005) J. Neurotrauma 22:929.
  12. Janes, P.W. et al. (2005) Cell 123:291.
  13. Carvalho, R.F. et al. (2006) Nat. Neurosci. 9:322.
  14. Shi, G. et al. (2010) Cell Res. June epub.
  15. Hu, T. et al. (2009) Biochemistry 48:6369.

Long Name

Eph Receptor A3

Alternate Names

Cek4, Hek4, Tyro4

Entrez Gene IDs

2042 (Human); 13837 (Mouse)

Gene Symbol

EPHA3

UniProt

NP_005224

Additional EphA3 Products

Product Documents for Recombinant Human EphA3 Fc Chimera Protein, CF

Product Datasheets

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Download SDS

Product Specific Notices for Recombinant Human EphA3 Fc Chimera Protein, CF

For research use only

Privacy and Cookie Policy
Site Map
© Copyright 2024 Bio-Techne. All Rights Reserved.