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Recombinant Human B7-H2 Fc Chimera Protein, CF

Catalog #: 165-B7
4 Citations 1 Review Datasheet / COA / SDS
Catalog # Availability Size / Price Qty
165-B7-100
Recombinant Human B7-H2 Fc Chimera Protein Bioactivity
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Product Details
Citations (4)
FAQs
Supplemental Products
Reviews (1)
Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant Human B7-H2 Fc Chimera Protein, CF Summary

Product Specifications

Purity
>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.
Endotoxin Level
<0.01 EU per 1 μg of the protein by the LAL method.
Activity
Measured by its ability to stimulate human T cell proliferation in the presence of anti-CD3. Wang, S. et al. (2000) Blood 96:2808. The ED50 for this effect is 0.3‑1.2 µg/mL in the presence of anti-CD3 immobilized at least at 20 ng/mL.
Optimal dilutions should be determined by each laboratory for each application.
Source
Mouse myeloma cell line, NS0-derived human B7-H2 protein
Human B7-H2
(Asp19-Ser258)
Accession # O75144.2		 DIEGRMD Human IgG1
(Pro100-Lys330)
N-terminus C-terminus
Accession #
O75144.2
N-terminal Sequence
Analysis
Asp19
Structure / Form
Disulfide-linked homodimer
Predicted Molecular Mass
53.4 kDa (monomer)
SDS-PAGE
80-90 kDa, reducing conditions

Product Datasheets

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165-B7

Product Datasheet
COA
SDS

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

165-B7

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

Scientific Data

Bioactivity Recombinant Human B7-H2 Fc Chimera Protein Bioactivity View Larger

Recombinant Human B7‑H2 Fc Chimera (Catalog # 165-B7) stimulates human T cell proliferation in the presence of anti-CD3. The ED50 for this effect is 0.3‑1.2 µg/mL in the presence of anti-CD3 immobilized at least at 20 ng/mL.

Reconstitution Calculator

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.

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Background: B7-H2

B7-H2, also known as B7-related protein (B7RP1), ICOS Ligand, and CD275, is an approximately 60 kDa transmembrane glycoprotein in the B7 family of immune regulatory molecules (1). Mature human B7-H2 consists of a 238 amino acid (aa) extracellular domain (ECD) with two immunoglobulin-like domains, a 21 aa transmembrane segment, and a 25 aa cytoplasmic domain (2, 3). Within the ECD, human B7-H2 shares 50% and 54% aa sequence identity with mouse and rat B7‑H2, respectively. Alternative splicing generates a long isoform that carries a 10 aa substitution for the C-terminal 3 residues. B7-H2 is expressed on antigen presenting cells such as B cells, macrophages, monocytes, and dendritic cells (2-6). It binds to ICOS on activated T cells, leading to both positive and negative effects on immune responses including its own down-regulation (2, 4, 7). Mouse and human B7-H2 exhibit cross-species binding to ICOS (3, 6). The B7-H2 interaction with ICOS is costimulatory for T cell proliferation as well as the development of B cells, plasma cells, follicular helper T cells (TFH) and germinal centers (2-4, 8, 9). In human but not in mouse, B7-H2 additionally binds to CD28 and CTLA4, and its interaction with CD28 can costimulate both human and mouse naïve T cells and regulatory T cells (Treg) (6). B7-H2 contributes to the development of allergic asthma by enhancing Th2 biased immune responses, limiting Th17 responses, and promoting eosinophilic infiltration into the lung (8, 10, 11). Its activation of ICOS on Treg limits pulmonary inflammation and airway hyperresponsiveness, promotes the development of inhalational tolerance, and impairs anti-tumor immunity (5, 12, 13). In contrast, its ligation of ICOS on TFH cells can increase the severity of autoimmune symptoms (9). A soluble form of human B7-H2 is elevated in the circulation of patients with active systemic lupus erythematosus (14). In the thyroid, B7-H2 is up-regulated on thyrocytes during inflammation and promotes their proliferation and production of thryoid hormones (15).

References
  1. Bour-Jordan, H. et al. (2011) Immunol. Rev. 241:180.
  2. Wang, S. et al. (2000) Blood 96:2808.
  3. Yoshinaga, S.K. et al. (2000) Int. Immunol. 12:1439.
  4. Yoshinaga, S.K. et al. (1999) Nature 402:827.
  5. Faget, J. et al. (2012) Cancer Res. 72:6130.
  6. Yao, S. et al. (2011) Immunity 32:729.
  7. Watanabe, M. et al. (2008) J. Immunol. 180:5222.
  8. Wong, S.-C. et al. (2003) Blood 102:1381.
  9. Hu, Y.-L. et al. (2009) J. Immunol. 182:1421.
  10. Kadkhoda, K. et al. (2010) J. Immunol. 184:3780.
  11. Kadkhoda, K. et al. (2011) Int. Immunol. 23:239.
  12. Gajewska, B.U. et al. (2005) J. Immunol. 174:3000.
  13. Akbari, O. et al. (2002) Nat. Med. 8:1024.
  14. Her, M. et al. (2009) Lupus 18:501.
  15. Wang, F. et al. (2012) J. Clin. Immunol. 32:1253.
Long Name
B7 Homolog 2
Entrez Gene IDs
23308 (Human); 50723 (Mouse); 499415 (Rat); 102132485 (Cynomolgus Monkey)
Alternate Names
B7H2; B7-H2; B7H2B7 homolog 2; B7-H2B7-related protein 1; B7RP-1; B7RP1B7-like protein Gl50; B7RP-1LICOS; CD275 antigen; CD275; GL50; GL50transmembrane protein B7-H2 ICOS ligand; ICOSL; ICOS-L; ICOSLG; inducible T-cell co-stimulator ligand; KIAA0653ICOS ligand

Citations for Recombinant Human B7-H2 Fc Chimera Protein, CF

R&D Systems personnel manually curate a database that contains references using R&D Systems products. The data collected includes not only links to publications in PubMed, but also provides information about sample types, species, and experimental conditions.

4 Citations: Showing 1 - 4
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  1. Activin A programs the differentiation of human TFH cells
    Nat Immunol, 2016-07-04;17(8):976-84.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  2. Function of Jam-B/Jam-C interaction in homing and mobilization of human and mouse hematopoietic stem and progenitor cells.
    Authors: Arcangeli M, Bardin F, Frontera V, Bidaut G, Obrados E, Adams R, Chabannon C, Aurrand-Lions M
    Stem Cells, 2014-04-01;32(4):1043-54.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  3. ICOS-LICOS interaction is critically involved in TGN1412-mediated T-cell activation.
    Blood, 2012-05-10;119(26):6268-77.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay
  4. ICOS cooperates with CD28, IL-2, and IFN-gamma and modulates activation of human naive CD4+ T cells.
    Authors: Mesturini R, Nicola S, Chiocchetti A, Bernardone IS, Castelli L, Bensi T, Ferretti M, Comi C, Dong C, Rojo JM, Yagi J, Dianzani U
    Eur. J. Immunol., 2006-10-01;36(10):2601-12.
    Species: Human
    Sample Types: Whole Cells
    Applications: Bioassay

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Recombinant Human B7-H2 Fc Chimera Protein, CF
By Anonymous on 03/24/2018
Application: Binding assay/Protein-protein interaction