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Human IL1R2 / IL1RB / CD121b Protein (His Tag)

CD121b,CDw121b,IL-1R-2,IL-1RT-2,IL-1RT2,IL1R2c,IL1RB

Catalog Number P10111-H08H
Organism Species Human
Host Human Cells
Synonyms CD121b,CDw121b,IL-1R-2,IL-1RT-2,IL-1RT2,IL1R2c,IL1RB
Molecular Weight The recombinant human IL1R2 consists of 342 amino acids and has a predicted molecular mass of 39.3 kDa. As a result of glycosylation, the rh IL1R2 migrates as an approximately 50-55 kDa band in SDS-PAGE under reducing conditions.
predicted N Phe 14
SDS-PAGE
Purity > 98 % as determined by SDS-PAGE
Protein Construction A DNA sequence encoding the extracellular domain (Met 1-Glu 343) of human IL1R2 (NP_004624.1) was expressed, with a fused C-terminal polyhistidine tag.
Bio-activity Measured by its ability to inhibit IL1β-dependent proliferation in D10.G4.1 mouse helper T cells.
The ED50 for this effect is typically 5.5 μg/mL in the presence of 40 pg/mL of rhIL1β.
Research Area Cancer |Cancer immunology |Cytokine & Receptor |Interleukin & Receptor |IL-1 family & Receptor |IL-1 Family Receptor |
Formulation Lyophilized from sterile PBS, pH 7.4
1. Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
Background Interleukin 1 receptor, type II (IL1R2) also known as CD121b (Cluster of Differentiation 121b) is a cytokine receptor that belongs to the interleukin-1 receptor family. This protein binds interleukin alpha (IL1A), interleukin beta (IL1B), and interleukin 1 receptor, type I (IL1R1/IL1RA), and acts as a decoy receptor that inhibits the activity of its ligands. The pleiotropic cytokine IL1 is produced to regulate development and maintenance of the inflammatory responses, and binds to specific plasma membrane receptors on cells. Two distinct types of IL1 receptors which are able to bind IL1 specifically have been identified, designated as IL1RI (IL1RA) and IL1RII (IL1RB). IL1R1 contributes to IL-1 signaling, whereas the IL-1R2/CD121b has no signaling property and acts as a decoy for IL-1. IL-1R2/CD121b structurally consisting of a ligand binding portion comprised of three Ig-like domains, a single transmembrane region, and a short cytoplasmic domain, is expressed in a variety of cell types including B lymphocytes, neutrophils, monocytes, large granular leukocytes and endothelial cells. Interleukin 4 (IL4) is reported to antagonize the activity of interleukin 1 by inducing the expression and release of this cytokine.
Reference
  • Cannon JG, et al. (1997) Interleukin-1 beta, interleukin-1 receptor antagonist, and soluble interleukin-1 receptor type II secretion in chronic fatigue syndrome. J Clin Immunol. 17 (3): 253-61.
  • Liu C, et al. (1996) Cloning and characterization of an alternatively processed human type II interleukin-1 receptor mRNA. J Biol Chem. 271 (34): 20965-72.
  • Van der Poll T, et al. (1997) Antiinflammatory cytokine responses during clinical sepsis and experimental endotoxemia: sequential measurements of plasma soluble interleukin (IL)-1 receptor type II, IL-10, and IL-13. J Infect Dis. 175 (1): 118-22.