Recombinant Human PD-L1/B7-H1 His-tag Protein, CF Best Seller

R&D Systems, part of Bio-Techne | Catalog # 9049-B7

R&D Systems, part of Bio-Techne
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9049-B7-100
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Key Product Details

Source

HEK293

Accession #

Q9NZQ7

Conjugate

Unconjugated

Applications

Binding Activity

View all PD-L1/B7-H1 Proteins and Enzymes »

Product Specifications

Source

Human embryonic kidney cell, HEK293-derived human PD-L1/B7-H1 protein
Phe19-Thr239, with a C-terminal 6-His tag

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.

N-terminal Sequence Analysis

Phe19

Predicted Molecular Mass

26 kDa

SDS-PAGE

31-41 kDa, reducing conditions

Activity

Measured by its binding ability in a functional ELISA.
When Recombinant Human PD-L1/B7-H1 is immobilized at 0.025 µg/mL (100 µL/well), the concentration of Recombinant Human PD‑1 Fc Chimera (Catalog # 1086-PD) that produces 50% of the optimal binding response is approximately 0.05-0.3 μg/mL.

Reviewed Applications

Read 12 reviews rated 5 using 9049-B7 in the following applications:

Scientific Data Images for Recombinant Human PD-L1/B7-H1 His-tag Protein, CF

Graph showing bioactivity of Human PD-L1 protein (B7-H1 protein)

Bioactivity of PD-L1 Protein

When Recombinant Human PD-L1 / B7-H1 is immobilized at 0.025 µg/mL, it binds to Recombinant Human PD-1 Fc Chimera (Catalog # 1086-PD) with an ED50 of 0.05-0.3 µg/mL.

Formulation, Preparation and Storage

9049-B7
Formulation Lyophilized from a 0.2 μm filtered solution in PBS.
Reconstitution
Reconstitute at 500 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: 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 human B7-H1 consists of a 220 amino acid (aa) extracellular domain (ECD) with two immunoglobulin-like domains, a 21 aa transmembrane segment, and a 31 aa cytoplasmic domain (2). Within the ECD, human B7-H1 shares 73% and 74% aa sequence identity with mouse and rat B7-H1, respectively. Alternative splicing generates additional isoforms that either lack the first Ig-like domain or are truncated within the second Ig-like domain (3). B7-H1 is expressed on inflammatory-activated immune cells including macrophages, T cells, and B cells (4-7), keratinocytes (8, 9), enothelial and intestinal epithelial cells (8, 10), as well as a variety of carcinomas and melanoma (11, 12). B7-H1 binds to T cell B7-1/CD80 and PD-1 (7, 8, 12-15). It suppresses T cell activation and proliferation (5, 8, 14, 16) and induces the apoptosis of activated T cells (11). It plays a role in the development of immune tolerance by promoting T cell anergy (7, 14) and enhancing regulatory T cell development (16). B7-H1 favors the development of anti-inflammatory IL-10 and IL-22 producing dendritic cells (5, 10) and inhibits the development of Th17 cells (16). In cancer, B7-H1 provides resistance to T cell mediated lysis, enhances EMT, and enhances the tumorigenic function of Th22 cells (6, 9, 12, 15).

References

  1. Ceeraz, S. et al. (2013) Trends Immunol. 34:556.
  2. Dong, H. et al. (1999) Nat. Med. 5:1365.
  3. Frigola, X. et al. (2011) Clin. Cancer Res. 17:1915.
  4. Tamura, H. et al. (2001) Blood 97:1809.
  5. Chen, L. et al. (2007) J. Immunol. 178:6634.
  6. Kuang, D.-M. et al. (2014) J. Clin. Invest. 124:4657.
  7. Tsushima, F. et al. (2007) Blood 110:180.
  8. Mazanet, M.M. and C.C.W. Hughes (2002) J. Immunol. 169:3581.
  9. Cao, Y. et al. (2010) Cancer Res. 71:1235.
  10. Scandiuzzi, L. et al. (2014) Cell Rep. 6:625.
  11. Dong, H. et al. (2002) Nat. Med. 8:793.
  12. Azuma, T. et al. (2008) Blood 111:3635.
  13. Butte, M.J. et al. (2008) Mol. Immunol. 45:3567.
  14. Park, J.-J. et al. (2010) Blood 116:1291.
  15. Ritprajak, P. et al. (2010) J. Immunol. 184:4918.
  16. 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

Q9NZQ7

Additional PD-L1/B7-H1 Products

Product Documents for Recombinant Human PD-L1/B7-H1 His-tag Protein, CF

Product Datasheets

Certificate of Analysis

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Product Specific Notices for Recombinant Human PD-L1/B7-H1 His-tag Protein, CF

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