ST2/IL-33R Antibody (2154E) [Alexa Fluor® 700]

• Reactivity: Hu
• Applications: Flow
• Clone: 2154E
• Clonality: Monoclonal
• Host: Rabbit
• Conjugate: Alexa Fluor 700

ST2/IL-33R Antibody (2154E) [Alexa Fluor® 700] Summary

• Additional Information: Recombinant Monoclonal Antibody.
• Immunogen: S. frugiperda insect ovarian cell line Sf 21-derived recombinant human ST2/IL-33 R
  Lys19-Phe328
  Accession # Q01638
• Specificity: Detects human ST2/IL-33R in direct ELISAs. In Flow Cytometry, it detects human ST2/IL-33R-transfected HEK293 cells but not irrelevant or non-transfected cells.
• Source: N/A
• Isotype: IgG
• Clonality: Monoclonal
• Host: Rabbit

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 ST2/IL-33R Antibody (2154E) [Alexa Fluor® 700]

• DER4
• DER4ST2growth stimulation-expressed
• Fit-1
• IL-1 R4
• IL1R4
• IL-1R4
• IL-1RL1
• IL-33 R
• IL33R
• IL-33R
• interleukin 1 receptor-like 1
• interleukin 1 receptor-related protein
• interleukin-1 receptor-like 1
• Ly84
• MGC32623
• Protein ST2
• ST2
• ST2L
• ST2V
• T1
• T1homolog of mouse growth stimulation-expressed

Background

ST2, also known as IL-33R, IL-1 R4 and T1, is an Interleukin-1 receptor family glycoprotein that contributes to Th2 immune responses (1, 2). Human ST2 consists of a 310 amino acid (aa) extracellular domain (ECD) with three Ig-like domains, a 21 aa transmembrane segment, and a 207 aa cytoplasmic domain with an intracellular TIR domain (3, 4). Alternate splicing of the 120 kDa human ST2 generates a soluble 60 kDa isoform that lacks the transmembrane and cytoplasmic regions as well as an isoform that additionally lacks the third Ig‑like domain (4). Within the ECD, human ST2 shares 68% and 64% aa sequence identity with mouse and rat ST2, respectively. ST2 is expressed on the surface of mast cells, activated Th2 cells, macrophages, and cardiac myocytes (5‑8). It binds IL-33, a cytokine that is upregulated by inflammation or mechanical strain in smooth muscle cells, airway epithelia, keratinocytes, and cardiac fibroblasts (5, 9). IL-33 binding induces the association of ST2 with IL-1R AcP, a shared signaling subunit that also associates with IL-1 RI and IL-1 R rp2 (1, 10, 11). In macrophages, ST2 interferes with signaling from IL-1 RI and TLR4 by sequestering the adaptor proteins MyD88 and Mal (7). In addition to its role in promoting mast cell and Th2 dependent inflammation, ST2 activation enhances antigen induced hypernociception and protects from atherosclerosis and cardiac hypertrophy (5, 12‑14). The soluble ST2 isoform is released by activated Th2 cells and strained cardiac myocytes and is elevated in the serum in allergic asthma (6, 8, 15). Soluble ST2 functions as a decoy receptor that blocks IL‑33's ability to signal through transmembrane ST2 (10, 13‑15).

1. Barksby, H.E. et al. (2007) Clin. Exp. Immunol. 149:217.
2. Gadina, M. and C.A. Jefferies (2007) Science STKE 2007:pe31.
3. Tominaga, S. et al. (1992) Biochim. Biophys. Acta 1171:215.
4. Li, H. et al. (2000) Genomics 67:284.
5. Schmitz, J. et al. (2005) Immunity 23:479.
6. Lecart, S. et al. (2002) Eur. J. Immunol. 32:2979.
7. Brint, E.K. et al. (2004) Nat. Immunol. 5:373.
8. Weinberg, E.O. et al. (2002) Circulation 106:2961.
9. Sanada S. et al. (2007) J. Clin. Invest. 117:1538.
10. Palmer, G. et al. (2008) Cytokine 42:358.
11. Chackerian, A.A. et al. (2007) J. Immunol. 179:2551.
12. Allakhverdi, Z. et al. (2007) J. Immunol. 179:2051.
13. Verri Jr., W.A. et al. (2008) Proc. Natl. Acad. Sci. 105:2723.
14. Miller, A.M. et al. (2008) J. Exp. Med. 205:339.
15. Hayakawa, H. et al. (2007) J. Biol. Chem. 282:26369.

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.

Bioinformatics

• Uniprot:
  • Q01638()