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Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein, CF Best Seller

Bio-Techne includes R&D Systems | Catalog # 1019-B7

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1019-B7-100

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 PD-L1/B7-H1 protein
Mouse PD-L1
(Phe19-Thr238)
Accession # Q9EP73
IEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus

Purity

>90%, 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.

N-terminal Sequence Analysis

Phe19

Predicted Molecular Mass

51.3 kDa (monomer)

SDS-PAGE

75-85 kDa, reducing conditions

Activity

Measured by its ability to inhibit anti-CD3-induced proliferation of stimulated mouse T cells.
The ED50 for this effect is 0.15-0.75 µg/mL.

Scientific Data Images for Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein, CF

Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein Bioactivity

Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein Bioactivity

Recombinant Mouse PD-L1/B7-H1 Fc Chimera (Catalog # 1019-B7) inhibits anti-CD3-induced cell proliferation of stimulated mouse T cells. The ED50 for this effect is 0.15-0.75 μg/mL.
Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein SDS-PAGE

Recombinant Mouse PD-L1/B7-H1 Fc Chimera Protein SDS-PAGE

1 μg/lane of Recombinant Mouse PD-L1/B7-H1 Fc Chimera was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by silver staining, showing bands at 79 kDa and 150 kDa, respectively.
Surface plasmon resonance sensorgram of mouse PD-L1 protein binding to mouse PD-1

Binding of Mouse PD-1 to PD-L1/B7-H1 by surface plasmon resonance (SPR).

Recombinant Mouse PD-L1/B7-H1 Fc protein (Catalog # 1019-B7) was immobilized on a Biacore Sensor Chip CM5, and binding to Recombinant Mouse PD-1 His protein (9047-PD) was measured at a concentration range between 1.53 nM and 1.56 uM. The double-referenced sensorgram was fit to a 1:1 binding model to determine the binding kinetics and affinity, with an affinity constant of KD=0.539 uM. (Biacore T200).

Formulation, Preparation and Storage

1019-B7
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
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: PD-L1/B7-H1

B7-H1, also known as PD-L1 and CD274, is an approximately 65 kDa transmembrane glycoprotein in the B7 family of immune regulatory molecules (1). Mature mouse B7-H1 consists of a 221 amino acid (aa) extracellular domain (ECD) with two immunoglobulin-like domains, a 21 aa transmembrane segment, and a 30 aa cytoplasmic domain (2). Within the ECD, mouse B7-H1 shares 73% and 86% aa sequence identity with human and rat B7-H1, respectively. B7-H1 is expressed on inflammatory-activated immune cells including macrophages, T cells, and B cells (2-5), keratinocytes (6, 7), enothelial and intestinal epithelial cells (6, 8), as well as a variety of carcinomas and melanoma (9, 10). B7-H1 binds to T cell B7-1/CD80 and PD-1 (5, 6, 10-13). It suppresses T cell activation and proliferation (3, 6, 12, 14) and induces the apoptosis of activated T cells (9). It plays a role in the development of immune tolerance by promoting T cell anergy (5, 12) and enhancing regulatory T cell development (14). B7-H1 favors the development of anti-inflammatory IL-10 and IL-22 producing dendritic cells (3, 8) and inhibits the development of Th17 cells (14). In cancer, B7-H1 provides resistance to T cell mediated lysis, enhances EMT, and enhances the tumorigenic function of Th22 cells (4, 7, 10, 13).

References

  1. Ceeraz, S. et al. (2013) Trends Immunol. 34:556.
  2. Tamura, H. et al. (2001) Blood 97:1809.
  3. Chen, L. et al. (2007) J. Immunol. 178:6634.
  4. Kuang, D.-M. et al. (2014) J. Clin. Invest. 124:4657.
  5. Tsushima, F. et al. (2007) Blood 110:180.
  6. Mazanet, M.M. and C.C.W. Hughes (2002) J. Immunol. 169:3581.
  7. Cao, Y. et al. (2010) Cancer Res. 71:1235.
  8. Scandiuzzi, L. et al. (2014) Cell Rep. 6:625.
  9. Dong, H. et al. (2002) Nat. Med. 8:793.
  10. Azuma, T. et al. (2008) Blood 111:3635.
  11. Butte, M.J. et al. (2008) Mol. Immunol. 45:3567.
  12. Park, J.-J. et al. (2010) Blood 116:1291.
  13. Ritprajak, P. et al. (2010) J. Immunol. 184:4918.
  14. Herold, M. et al. (2015) J. Immunol. 195:3584.

Long Name

Programmed Death Ligand 1

Alternate Names

B7-H1, B7H1, CD274, PDCD1L1, PDCD1LG1, PDL1

Entrez Gene IDs

29126 (Human); 60533 (Mouse); 499342 (Rat); 574058 (Porcine); 484186 (Canine); 102145573 (Cynomolgus Monkey)

Gene Symbol

CD274

UniProt

Additional PD-L1/B7-H1 Products

Product Documents for Recombinant Mouse PD-L1/B7-H1 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 PD-L1/B7-H1 Fc Chimera Protein, CF

For research use only

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