Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein, CF

R&D Systems | Catalog # AVI689

Biotinylated
R&D Systems
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Key Product Details

  • R&D Systems CHO-derived Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein (AVI689)
  • Quality control testing to verify active proteins with lot specific assays by in-house scientists
  • All R&D Systems proteins are covered with a 100% guarantee

Source

CHO

Accession Number

Q9Y5U5.1

Structure / Form

Disulfide-linked homodimer, biotinylated via Avi-tag

Conjugate

Biotin

Applications

Bioactivity
View all GITR/TNFRSF18 Proteins and Enzymes »

Why choose R&D Systems Avi-tag GITR Protein?

  • Guaranteed Bioactivity and High Purity: Bioactivity tested by functional ELISA and purity determined by SDS-PAGE to be greater than 95%.
  • Lot-to-Lot Consistency: Stringent QC testing performed on each lot to ensure consistent activity and purity.
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Product Specifications

Source

Chinese Hamster Ovary cell line, CHO-derived human GITR/TNFRSF18 protein
GITR/TNFRSF18
(Gln26-Glu161)
Accession # Q9Y5U5.1		 IEGRMD Human IgG1
(Pro100-Lys330)		 Avi-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

Gln26 inferred from enzymatic pyroglutamate treatment revealing Arg27

Predicted Molecular Mass

43 kDa

SDS-PAGE

54-60 kDa, under reducing conditions

Activity

Measured by its binding ability in a functional ELISA.
When Recombinant Human GITR Ligand/TNFSF18 (Catalog # 6987-GL) is immobilized at 0.5 μg/mL (100 μL/well), It binds to Biotinylated Recombinant Human GITR/TNFRSF18 Fc Chimera Avi-tag (Catalog # AVI689) with an ED50 of 0.05-0.5 μg/mL.

Scientific Data Images for Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein, CF

Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein Binding Activity

Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein Binding Activity

When Recombinant Human GITR Ligand/TNFSF18 (Catalog # 6987-GL) is immobilized at 0.5 µg/mL, 100 µL/well, Biotinylated Recombinant Human GITR/TNFRSF18 Fc Chimera Avi-tag (Catalog # AVI689) binds with an ED50 of 0.05-0.5 µg/mL.
Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein SDS-PAGE

Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein SDS-PAGE

2 μg/lane of Biotinylated Recombinant Human GITR/TNFRSF18 Fc Chimera Avi-tag (Catalog # AVI689) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 54-60 kDa and 108-120 kDa.

Formulation, Preparation, and Storage

AVI689
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 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.

Calculators

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: GITR/TNFRSF18

GITR (glucocorticoid-induced tumor necrosis factor receptor), also known as AITR and TNFRSF18, is a 40 kDa transmembrane glycoprotein that functions in immune regulation (1, 2). Mature human GITR consists of a 137 amino acid (aa) extracellular domain (ECD) with three tandem TNFR cysteine-rich repeats, a 21 aa transmembrane segment, and a 58 aa cytoplasmic domain (3, 4). Within the ECD, human GITR shares 55% and 60% aa sequence identity with mouse and rat GITR, respectively. Alternative splicing generates an isoform with a short deletion in the cytoplasmic domain and a potentially secreted isoform that is substituted within the third TNFR repeat and lacks the transmembrane and cytoplasmic regions. GITR is expressed on CD4+CD25+ regulatory T cells (Treg) as well as on subsets of thymocytes, lymph node cells, and splenocytes (4-6), and it is upregulated on antigen-activated conventional CD4+ and CD8+ T cells (3, 4, 6, 7). GITR binding by GITR Ligand/TNFSF18 costimulates the proliferation and activation of CD4+ or CD8+ conventional T cells (3, 7-9). It also induces the proliferation of Treg (8, 10) but inhibits the ability of Treg to suppress immune responses (5, 8, 11-13). This can result in the development of autoimmunity, increased tumor cell killing by effector T cells (5, 11), and increased inflammation in arthritis, allergic asthma, and inflammatory bowel disease (10, 14). GITR is also expressed on sympathetic neurons where it enhances NGF-induced neurite outgrowth and branching (15).

References

  1. Clouthier, D.L. and T.H. Watts (2014) Cytokine Growth Factor Rev. 25:91.
  2. Ronchetti, S. et al. (2015) J. Immunol. Res. 2015:171520.
  3. Gurney, A.L. et al. (1999) Curr. Biol. 9:215.
  4. Kwon, B. et al. (1999) J. Biol. Chem. 274:6056.
  5. Shimizu, J. et al. (2002) Nat. Immunol. 3:135.
  6. Nocentini, G. et al. (1997) Proc. Natl. Acad. Sci. USA 94:6216.
  7. Muriglan, S.J. et al. (2004) J. Exp. Med. 200:149.
  8. Ronchetti, S. et al. (2004) Eur. J. Immunol. 34:613.
  9. Tone, M. et al. (2003) Proc. Natl. Acad. Sci. USA 100:15059.
  10. Ephrem, A. et al. (2013) Eur. J. Immunol. 43:2421.
  11. Ko, K. et al. (2005) J. Exp. Med. 202:885.
  12. Ji, H. et al. (2004) J. Immunol. 172:5823.
  13. Stephens, G.L. et al. (2004) J. Immunol. 173:5008.
  14. Patel, M. et al. (2005) Eur. J. Immunol. 35:3581.
  15. O'Keeffe, G.W. et al. (2008) Nat. Neurosci. 11:135.

Long Name

Glucocorticoid Induced TNF Receptor Family Related Gene

Alternate Names

AITR, CD357, TNFRSF18

Entrez Gene IDs

8784 (Human); 21936 (Mouse); 500598 (Rat); 102146362 (Cynomolgus Monkey)

Gene Symbol

TNFRSF18

UniProt

Q9Y5U5.1

Additional GITR/TNFRSF18 Products

Product Documents for Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein, CF

Certificate of Analysis

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Product Specific Notices for Recombinant Human GITR/TNFRSF18 Fc Avi-tag Protein, CF

For research use only

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