Recombinant Human ICOS Fc Chimera Protein, CF Summary
Product Specifications
Optimal dilutions should be determined by each laboratory for each application.
| Human ICOS (Glu21-Phe141) Accession # Q9Y6W8 |
IEGRMD | Human IgG1 (Pro100-Lys330) |
| N-terminus | C-terminus | |
Analysis
Product Datasheets
Carrier Free
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.
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.
169-CS
| 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.
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Scientific Data
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Recombinant Human ICOS Fc Chimera (Catalog # 169-CS) inhibits rhB7-H2/Fc Chimera (Catalog # 165-B7) induced human T cell proliferation in the presence of anti-CD3. The ED50 for this effect is 1-4 µg/mL.
Reconstitution Calculator
Background: ICOS
Inducible co-stimulator (ICOS), also called AILIM (activiation-inducible lymphocyte immunomediatory molecule) and CRP-1 (CD28-related protein-1), is a member of the growing CD28 family of immune costimulatory receptors. Other family members are CD28, CTLA-4 and PD-1. Human ICOS is a homodimeric type I transmembrane protein consisting of 199 amino acids (aa) with a putative 20 aa signal sequence, a 121 aa extracellular domain, a 23 aa transmembrane region, and a 35 aa cytoplasmic domain. ICOS shares approximately 39% amino acid similarity with CD28 and CTLA-4. Human and mouse ICOS share approximately 72% amino acid identity. ICOS is expressed on most CD45RO+ cells. ICOS expression is up-regulated within approximately 24 - 48 hours of activation on Th primed cells. B7-H2, a member of the B7 family of co-stimulatory ligands, has been identified as the ICOS ligand. The B7-H2/ICOS interaction appears to play roles in T cell dependent B cell activation and Th differentiation.
- Aicher, A. et al. (2000) J. Immunol. 164:4689.
- Coyle, A.J. et al. (2000) Immunity 13:95.
- Coyle, A.J. and J.C. Gutierrez-Ramos (2001) Nat. Immunol. 2:203.
- Gonzalo, J.A. et al. (2001) J. Immunol. 166:1.
- Hutloff, A. et al. (1999) Nature 397:263.
- Mages, H.W. et al. (2000) Eur. J. Immunol. 30:1040.
- Yoshinaga, S.K. et al. (1999) Nature 402:827.
Citations for Recombinant Human ICOS 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.
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Citations: Showing 1 - 3
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Orthogonal quantification of soluble inducible T-cell costimulator (ICOS) in healthy and diseased human serum
Authors: K McKinski, D McNulty, F Zappacosta, M Birchler, M Szapacs, C Evans
Journal of pharmaceutical analysis, 2021-06-27;12(2):317-323.
Species: N/A
Sample Types: N/A
Applications: ELISA Standard -
Nonimmune cell-derived ICOS ligand functions as a renoprotective alphavbeta3 integrin-selective antagonist
Authors: KH Koh, Y Cao, S Mangos, NJ Tardi, RR Dande, HW Lee, B Samelko, MM Altintas, VP Schmitz, H Lee, K Mukherjee, V Peev, DJ Cimbaluk, J Reiser, E Hahm
J. Clin. Invest., 2019-03-18;129(4):1713-1726.
Species: Human
Sample Types: Recombinant Protein
Applications: Surface Plasmon Resonance (SPR -
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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Average Rating: 4.7 (Based on 7 Reviews)
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Protein A beads were precoated with hICOS-L protein and incubated with increasing concentration of hIgG1 control or ICOS hIgG1 to a final concentration of 0 to 500nM. Binding was monitored by flow cytometry using anti-human 488 secondary antibody for detection.
Reason for Rating: 83& homogeneous
