IL1RAP/IL-1RAcP: IL1RAP/IL-1RAcP Protein | IL1RAP/IL-1RAcP Antibody

IL1RAP/IL-1RAcP Gene family

IL1RAP/IL-1RAcP Background

Interleukin-1 receptor accessory protein (IL-1RAcP) also known as Interleukin-1 receptor member 3 (IL-1R3) is a a cytokine receptor which binds interleukin 1. The IL-1 receptor accessory protein (IL1RAP) is a transmembrane protein that interacts with IL-1R and is required for IL-1 signal transduction. Interleukin 1 induces synthesis of acute phase and proinflammatory proteins during infection, tissue damage, or stress, by forming a complex at the cell membrane with an interleukin 1 receptor and an accessory protein. IL-1RAcP/IL-1R3 is a necessary part of the interleukin 1 receptor complex which initiates signalling events that result in the activation of interleukin 1-responsive genes. Alternative splicing of this gene results in two transcript variants encoding two different isoforms, one membrane-bound and one soluble. The ratio of soluble to membrane-bound forms increases during acute-phase induction or stress. IL-1RAcP/IL-1R3 mediates interleukin-1-dependent activation of NF-kappa-B. Isoform 1 is part of the membrane-bound form of the IL-1 receptor. Signaling involves formation of a ternary complex containing IL1R1, TOLLIP, MYD88, and IRAK1 or IRAK2. Isoform 2 modulates the response to interleukins by associating with soluble IL1R1 and enhancing interleukin-binding to the decoy receptor.

Reference for IL1RAP/IL-1RAcP

  • Goldbach-Mansky R, et al. (2009) Autoinflammation: the prominent role of IL-1 in monogenic autoinflammatory diseases and implications for common illnesses. J Allergy Clin Immunol. 124(6): 1141-9.
  • Johnston A, et al. (2011) IL-1F5, -F6, -F8, and -F9: a novel IL-1 family signaling system that is active in psoriasis and promotes keratinocyte antimicrobial peptide expression. J Immunol. 186(4): 2613-22.
  • Ozaki K, et al. (2001) Effect of tumor weight and tube feeding on TNF-alpha and IL-1beta mRNA expression in the brain of mice. JPEN J Parenter Enteral Nutr. 25(6): 317-22.

IL1RAP/IL-1RAcP Protein

IL1RAP/IL-1RAcP protein function

Coreceptor for IL1RL2 in the IL-36 signaling system (By similarity). Coreceptor with IL1R1 in the IL-1 signaling system. Associates with IL1R1 bound to IL1B to form the high affinity interleukin-1 receptor complex which mediates interleukin-1-dependent activation of NF-kappa-B and other pathways. Signaling involves the recruitment of adapter molecules such as TOLLIP, MYD88, and IRAK1 or IRAK2 via the respective TIR domains of the receptor/coreceptor subunits. Recruits TOLLIP to the signaling complex. Does not bind to interleukin-1 alone; binding of IL1RN to IL1R1, prevents its association with IL1R1 to form a signaling complex. The cellular response is modulated through a non-signaling association with the membrane IL1R2 decoy receptor. Coreceptor for IL1RL1 in the IL-33 signaling system. Can bidirectionally induce pre- and postsynaptic differentiation of neurons by trans-synaptically binding to PTPRD (By similarity). May play a role in IL1B-mediated costimulation of IFNG production from T-helper 1 (Th1) cells (Probable). {ECO:0000250|UniProtKB:Q61730, ECO:0000269|PubMed:10799889, ECO:0000269|PubMed:9371760, ECO:0000305|PubMed:10653850, ECO:0000305|PubMed:19836339}.; Isoform 2: Associates with secreted ligand-bound IL1R2 and increases the affinity of secreted IL1R2 for IL1B; this complex formation may be the dominant mechanism for neutralization of IL1B by secreted/soluble receptors (PubMed:12530978). Enhances the ability of secreted IL1R1 to inhibit IL-33 signaling (By similarity). {ECO:0000250|UniProtKB:Q61730, ECO:0000269|PubMed:12530978}.; Isoform 4: Unable to mediate canonical IL-1 signaling (PubMed:19481478). Required for Src phosphorylation by IL1B. May be involved in IL1B-potentiated NMDA-induced calcium influx in neurons (By similarity). {ECO:0000250|UniProtKB:Q61730, ECO:0000269|PubMed:19481478}.

IL1RAP/IL-1RAcP protein expression

Tissue specificity

Detected in liver, skin, placenta, thymus and lung. Isoform 4 is predominantly expressed in brain. Overexpresed on candidate chronic myeloid leukemia (CML) stem cells, hematopoietic stem cells and mononuclear cells of patients with acute myeloid leukemia (AML). Overexpressed in patients with chronic obstructive pulmonary disease (COPD). Expressed in T-helper 1 (Th1) and T-helper 2 (Th2) cell subsets (PubMed:10653850).


Isoform 1 is down-regulated by phorbol ester treatment. Isoform 2 is induced by phorbol ester treatment.

IL1RAP/IL-1RAcP protein sequence

This sequence information is just for reference only.From Uniport

  • Length
  • Mass (Da)

IL1RAP/IL-1RAcP Antibody

There are 8 IL1RAP/IL-1RAcP antibodies which are validated in multiple tissues with various applications, including ELISA, FCM, WB. There are 5 IL1RAP/IL-1RAcP antibody for ELISA, 4 IL1RAP/IL-1RAcP antibody for FCM, 1 IL1RAP/IL-1RAcP antibody for WB. Among all these IL1RAP/IL-1RAcP antibodies, there are 5 anti-IL1RAP/IL-1RAcP mouse monoclonal antibodies , 3 anti-IL1RAP/IL-1RAcP rabbit polyclonal antibodies . All the IL1RAP/IL-1RAcP anbodies are produced in house and all are in stock. IL1RAP/IL-1RAcP antibody customerized service is available.


IL1RAP gene / cDNA is a protein-coding gene which located on 3q28. The IL1RAP gene is conserved in chimpanzee, dog, cow, mouse, rat, chicken, and frog.218 organisms have orthologs with human gene IL1RAP.