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Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF

Catalog # 1390-ER | R&D Systems, Inc. a Bio-Techne Brand
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1390-ER-050

Key Product Details

Source

NS0

Accession #

Structure / Form

Disulfide-linked homodimer

Conjugate

Unconjugated

Applications

Bioactivity

Product Specifications

Source

Mouse myeloma cell line, NS0-derived mouse Erythropoietin R protein
Mouse Epo R
(Ala25 - Pro249)
Accession # P14753
IEGRMD Human IgG1
(Pro100 - Lys330)
N-terminus C-terminus

Purity

>90%, 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

Ala25

Predicted Molecular Mass

51.3 kDa (monomer)

SDS-PAGE

60 kDa, reducing conditions

Activity

Measured by its ability to inhibit Epo-dependent proliferation of TF‑1 human erythroleukemic cells. Kitamura, T. et al. (1989) J. Cell Physiol. 140:323.
The ED50 for this effect is 12.5-50 ng/mL in the presence of 16 ng/mL of rmEpo.

Formulation, Preparation and Storage

1390-ER
Formulation Lyophilized from a 0.2 μm filtered solution in PBS, EDTA and CHAPS.
Reconstitution
Reconstitute at 100 μg/mL in sterile PBS.

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: Erythropoietin R

Erythropoietin (Epo), a glycoprotein produced primarily by the kidney, is the principal factor that regulates erythropoiesis by stimulating the proliferation and differentiation of erythroid progenitor cells. The biological effects of Epo are mediated by the erythropoietin receptor (Epo R). A member of the hematopoietic growth factor receptor superfamily which includes IL-2, IL-3, IL-4, IL-5, IL-6, IL-7, GM-CSF, G-CSF, thrombopoietin, LIF, CNTF, growth hormone, and prolactin, Epo R is expressed not only by erythroid cells but also by embryonic stem cells, endothelial cells, and neural cells (1). Mouse Epo R cDNA encode a type I membrane-spanning protein with 507 amino acid (aa) residues. Mouse Epo R has a 24 aa hydrophobic signal peptide, a 225 aa extracellular domain, a 22 aa transmembrane domain, and a 236 aa intracellular domain. At the protein sequence level, the human Epo R is approximately 82% identical to the mouse protein (2). Mouse and human Epo R both contain 11 cysteine residues and an N-linked glycosylation site. Mouse Epo R, however, contains two disulfide bridges not found with human Epo R. In common with other hematopoietic growth factor receptor superfamily members, mouse Epo R has 4 positionally conserved cysteines in its extracellular domain, a tryptophan-serine-X-tryptophan-serine (WSXWS) motif or its homolog located near the transmembrane region, and lacks kinase motifs in its intracellular domain. Based on its amino acid composition the molecular weight of Epo R would be 55 kDa but after post translational modification including glycosylation and tyrosine and serine-threonine phosphorylation the molecular weight can be as high as 78 kDa (1). As a result of alternative splicing of the Epo R gene, cDNA clones encoding a truncated form of the Epo R as well as a soluble form of Epo R has been found (2, 3). The presence of a soluble form of the Epo R has also been detected in human sera. Recombinant soluble Epo R binds Epo with high affinity and is a potent Epo antagonist (3).

References

  1. Spivak, J.L. (2001) in Cytokine Reference, Oppenhiem, J.J. and M. Feldmann, eds. Academic Press, New York, p. 941.
  2. Kuramochi, S., Y. Ikawa and K. Todokoro (1990) J. Mol. Biol. 216:567.
  3. Baynes, R.D. et al. (1993) Blood 82:2088.

Long Name

Erythropoietin Receptor

Alternate Names

EpoR

Entrez Gene IDs

2057 (Human); 13857 (Mouse)

Gene Symbol

EPOR

UniProt

Additional Erythropoietin R Products

Product Documents for Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF

Certificate of Analysis

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Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Recombinant Mouse Erythropoietin R Fc Chimera Protein, CF

For research use only

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