Key Product Details

Species Reactivity

Human

Applications

Flow Cytometry

Label

Fluorescein (Excitation = 488 nm, Emission = 515-545 nm)

Antibody Source

Recombinant Monoclonal Rabbit IgG Clone # 2154B
View all ST2/IL-33R Primary Antibodies »

Product Specifications

Immunogen

S. frugiperda insect ovarian cell line Sf 21-derived recombinant human ST-2/ IL-33R
Lys19-Phe328
Accession # Q01638

Specificity

Detects human ST-2/IL-33R in direct ELISAs.

Clonality

Monoclonal

Host

Rabbit

Isotype

IgG

Scientific Data Images for Human ST2/IL-33R Fluorescein‑conjugated Antibody

Detection of ST2/IL-33 R antibody in HEK293 Human Cell Line Transfected with Human ST2/IL-33 R antibody by Flow Cytometry.

Detection of ST2/IL-33 R in HEK293 Human Cell Line Transfected with Human ST2/IL-33 R by Flow Cytometry.

HEK293 human embryonic kidney cell line transfected with either human ST2/IL-33 R (filled histogram) or irrelevant transfectants (open histogram) was stained with Rabbit Anti-Human ST2/IL-33 R Fluorescein-conjugated Monoclonal Antibody (Catalog # FAB5232F). View our protocol for Staining Membrane-associated Proteins.

Applications for Human ST2/IL-33R Fluorescein‑conjugated Antibody

Application
Recommended Usage

Flow Cytometry

10 µL/106 cells
Sample: HEK293 human cell line transfected with human ST2/IL-33 R

Spectra Viewer

Plan Your Experiments

Use our spectra viewer to interactively plan your experiments, assessing multiplexing options. View the excitation and emission spectra for our fluorescent dye range and other commonly used dyes.

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Spectra Viewer

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Flow Cytometry

Formulation, Preparation, and Storage

Purification

Protein A or G purified from cell culture supernatant

Formulation

Supplied in a saline solution containing BSA and Sodium Azide.

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Protect from light. Do not freeze.
  • 12 months from date of receipt, 2 to 8 °C as supplied.

Background: ST2/IL-33R

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).

References

  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.

Long Name

Interleukin 33 Receptor

Alternate Names

DER4, Fit-1, IL-1 R4, IL-1R4, IL-1RL1, IL-33 R, IL-33R, IL1R4, IL33R, Ly84, ST2L, ST2V, T1

Entrez Gene IDs

9173 (Human); 17082 (Mouse)

Gene Symbol

IL1RL1

UniProt

Q01638

Additional ST2/IL-33R Products

Product Documents for Human ST2/IL-33R Fluorescein‑conjugated Antibody

Certificate of Analysis

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Product Specific Notices for Human ST2/IL-33R Fluorescein‑conjugated Antibody

For research use only

Related Research Areas

Group 2 ILCs
IL-1 Family

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