Recombinant Human CD200 His-tag Protein, CF

Catalog # Availability Size / Price Qty
10032-CD-050
Recombinant Human CD200 His-tag Protein, CF Binding Activity
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Recombinant Human CD200 His-tag Protein, CF Summary

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 binding ability in a functional ELISA. When Recombinant Human CD200 R1 Fc Chimera (Catalog # 3414-CD) is immobilized at 2 µg/mL (100 µL/well), Recombinant Human CD200 binds with an ED50 of 0.2-1.2 μg/mL.
Source
Chinese Hamster Ovary cell line, CHO-derived human CD200 protein
Met1-Gly232, with a C-terminal 6-His tag
Accession #
N-terminal Sequence
Analysis
No results obtained. Gln31 inferred from enzymatic pyroglutamate treatment revealing Val32.
Predicted Molecular Mass
23 kDa
SDS-PAGE
38-54 kDa, reducing conditions

Product Datasheets

10032-CD

Formulation Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
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:
  • 12 months from date of receipt, ≤ -20 °C as supplied.
  • 1 month, 2 to 8 °C under sterile conditions after reconstitution.
  • 3 months, ≤ -20 °C under sterile conditions after reconstitution.

Data Images

Binding Activity Recombinant Human CD200 His-tag Protein, CF Binding Activity View Larger

When Recombinant Human CD200 R1 Fc Chimera (Catalog # 3414-CD) is immobilized at 2 µg/mL, Recombinant Human CD200 (Catalog #10032-CD) binds with an ED50 of 0.2-1.2 μg/mL.

SDS-PAGE Recombinant Human CD200 His-tag Protein, CF SDS-PAGE View Larger

2 μg/lane of Recombinant Human CD200 was resolved with SDS-PAGE underreducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Bluestaining, showing bands at 38-54 kDa.

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Background: CD200

CD200, also known as OX-2, is a 45 kDa transmembrane immunoregulatory protein that belongs to the immunoglobulin superfamily (1, 2). The human CD200 cDNA encodes a 278 amino acid (aa) precursor that includes a 30 aa signal sequence, a 202 aa extracellular domain (ECD), a 27 aa transmembrane segment, and a 19 aa cytoplasmic domain. The ECD is composed of one Ig-like V-type domain and one Ig-like C2-type domain (3). A splice variant of CD200 has been described and has a truncated cytoplasmic tail. Within the ECD, human CD200 shares 76% aa sequence identity with mouse and rat CD200. CD200 is widely but not ubiquitously expressed (4). Its receptor (CD200R) is restricted primarily to mast cells, basophils, macrophages, and dendritic cells, which suggests myeloid cell regulation as the major function of CD200 (5-7). CD200 knockout mice are characterized by increased macrophage number and activation and are predisposed to autoimmune disorders (8). CD200 and CD200R associate via their respective N-terminal Ig-like domains (9). In myeloid cells, CD200R initiates inhibitory signals following receptor-ligand contact (6, 7, 10). In T cells, however, CD200 functions as a costimulatory molecule independent of the CD28 pathway (11). Several additional CD200R-like molecules have been identified in human and mouse, but their capacity to interact with CD200 is controversial (12, 13). Several viruses encode CD200 homologs which are expressed on infected cells during the lytic phase (14, 15). Like CD200 itself, viral CD200 homologs also suppress myeloid cell activity, enabling increased viral propagation (5, 14-16).

References
  1. Gorczynski, R.M. (2005) Curr. Opin. Invest. Drugs 6:483.
  2. Barclay, A.N. et al. (2002) Trends Immunol. 23:285.
  3. McCaughan, G.W. et al. (1987) Immunogenetics 25:329.
  4. Wright, G.J. et al. (2001) Immunology 102:173.
  5. Shiratori, I. et al. (2005) J. Immunol. 175:4441.
  6. Cherwinski, H.M. et al. (2005) J. Immunol. 174:1348.
  7. Fallarino, F. et al. (2004) J. Immunol. 173:3748.
  8. Hoek, R.M. et al. (2000) Science 290:1768.
  9. Hatherley, D. and A.N. Barclay (2004) Eur. J. Immunol. 34:1688.
  10. Jenmalm, M.C. et al. (2006) J. Immunol. 176:191.
  11. Borriello, F. et al. (1997) J. Immunol. 158:4548.
  12. Gorczynski, R. et al. (2004) J. Immunol. 172:7744.
  13. Hatherley, D. et al. (2005) J. Immunol. 175:2469.
  14. Foster-Cuevas, M. et al. (2004) J. Virol. 78:7667.
  15. Cameron, C.M. et al. (2005) J. Virol. 79:6052.
  16. Langlais, C.L. et al. (2006) J. Virol. 80:3098.
Entrez Gene IDs
4345 (Human); 17470 (Mouse); 102146004 (Cynomolgus Monkey)
Alternate Names
antigen identified by monoclonal MRC OX-2; CD200 antigenMOX1; CD200 molecule; CD200; MOX1; MOX2; MOX2MRC; MRC OX-2 antigen; MRC; OX-2 membrane glycoprotein; OX-2

FAQs

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Primary Antibodies

His Tag Antibody

WB,Simple Western,Flow,AP,CyTOF-ready

Protein Purification Kits

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