GITR/TNFRSF18 Antibody (2375B) [Alexa Fluor® 350]

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Product Details

Summary
Reactivity MuSpecies Glossary
Applications Flow
Clone
2375B
Clonality
Monoclonal
Host
Rabbit
Conjugate
Alexa Fluor 350

GITR/TNFRSF18 Antibody (2375B) [Alexa Fluor® 350] Summary

Additional Information
Recombinant Monoclonal Antibody.
Immunogen
S. frugiperda insect ovarian cell line Sf 21-derived recombinant mouse GITR/TNFRSF18
Accession # O35714
Specificity
Detects mouse GITR/TNFRSF18 in direct ELISAs.
Source
N/A
Isotype
IgG
Clonality
Monoclonal
Host
Rabbit
Innovator's Reward
Test in a species/application not listed above to receive a full credit towards a future purchase.

Applications/Dilutions

Dilutions
  • Flow Cytometry 0.25-1 ug/10^6 cells

Packaging, Storage & Formulations

Storage
Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.
Buffer
Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

Notes

This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.

Alternate Names for GITR/TNFRSF18 Antibody (2375B) [Alexa Fluor® 350]

  • Activation-inducible TNFR family receptor
  • AITR
  • AITRTNF receptor superfamily activation-inducible protein
  • CD357 antigen
  • CD357
  • GITR
  • GITR-D
  • GITRtumor necrosis factor receptor superfamily member 18
  • Glucocorticoid-induced TNFR-related protein
  • TNFRSF18
  • tumor necrosis factor receptor superfamily, member 18

Background

GITR (glucocorticoid-induced tumor necrosis factor receptor; also named AITR) is a member of the co‑stimulatory subset of the TNF receptor superfamily (1, 2). In mouse, the GITR gene is composed of five exons and encodes multiple length isoforms that arise from alternate splicing. The “standard”, or first reported isoform is a type I transmembrane protein, 228 amino acids (aa) in length that contains a 19 aa signal sequence, a 134 aa extracellular region, a 21 aa transmembrane segment, and a 54 aa cytoplasmic domain. The extracellular region contains four potential N-linked glycosylation sites plus three cysteine-rich pseudorepeats of about 40 aa each (3, 4). The extracellular regions of mouse and human are 57% aa identical. The cytoplasmic domain has a P-x-Q/E-E motif that is known to associate with TRAF2. This is a common characteristic of TNFRSF members with co‑stimulatory functions (4). Three other mouse GITR isoforms (B, C and D) have been reported (5). All share the same N-terminal 101 of 134 aa in the extracellular region (including pseudorepeats #1, #2 and one-half of #3). Isoform D diverges at aa #101 and continues for another 12 aa for a total length of 113 aa. This is a naturally-occurring soluble form. Isoforms B and C show splicing in their cytoplasmic tails that creates cytoplasmic domains of 118 aa and 46 aa, respectively. In both the B and C isoforms, the TRAF2 binding site is spliced out, with a p56lck binding site inserted in isoform B (4). Given its membership in the TNFRSF, it likely functions as a trimer on the cell surface (2). GITR is predominantly expressed on CD4+CD25+ regulatory T cells (Treg) and naïve CD8+ and CD4+ CD25- T cells, where its expression is up-regulated after antigen-driven activation. GITR activation provides co‑stimulatory signals for activated CD4+ CD25- T cells to enhance cell proliferation and augment cytokine production (IL-2, IL-4, IFN-gamma ). On CD4+ CD25+ Treg cells, GITR activation provides co‑stimulatory signals to induce proliferation, setting Treg cells in an active/hyperproliferactive state (6‑8).

  1. Kwon, B. et al. (2003) Exp. Mol. Med. 35:8. 
  2. Croft, M. (2003) Nat. Rev. Immunol. 3:609. 
  3. Nocentini, G. et al. (1997) Proc. Natl. Acad. Sci. USA 94:6216.
  4. Nocentini, G. et al. (2000) DNA Cell Biol. 19:205. 
  5. Nocentini, G. et al. (2000) Cell Death Differ. 7:408.
  6. Tone, M. et al. (2003) Proc. Natl. Acad. Sci. USA 100:15059.
  7. Ji, H. et al. (2004) J. Immunol. 172:5823.
  8. Stephens, G.L. et al. (2004) 173:5008.

Limitations

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Secondary Antibodies

 

Isotype Controls

Other Available Formats

Alexa Fluor 350 FAB52412U
Alexa Fluor 405 FAB52412V
Alexa Fluor 488 FAB52412G
Alexa Fluor 594 FAB52412T
Alexa Fluor 647 FAB52412R
Alexa Fluor 700 FAB52412N
Alexa Fluor 750 FAB52412S

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