| Tissue Specificity | Detected in liver, skin, placenta, thymus and lung. Isoform 4 is predominantly expressed in brain. Overexpressed 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. |
| Function | Coreceptor for IL1RL2 in the IL-36 signaling system. 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. May play a role in IL1B-mediated costimulation of IFNG production from T-helper 1 (Th1) cells (Probable). 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. Enhances the ability of secreted IL1R1 to inhibit IL-33 signaling. Isoform 4: Unable to mediate canonical IL-1 signaling. Required for Src phosphorylation by IL1B. May be involved in IL1B-potentiated NMDA-induced calcium influx in neurons. |
| Protein Name | Interleukin-1 Receptor Accessory ProteinIl-1 Receptor Accessory ProteinIl-1racpInterleukin-1 Receptor 3Il-1r-3Il-1r3 |
| Database Links | Reactome: R-HSA-1257604 Q9NPH3-1Reactome: R-HSA-388844 Q9NPH3-1Reactome: R-HSA-6811558 Q9NPH3-1Reactome: R-HSA-9014826 Q9NPH3-1Reactome: R-HSA-9014843 Q9NPH3-1Reactome: R-HSA-9020702 Q9NPH3-1 |
| Cellular Localisation | Isoform 1: Cell MembraneSingle-Pass Type I Membrane ProteinIsoform 2: SecretedIsoform 3: Secreted |
| Alternative Protein Names | Interleukin-1 Receptor Accessory Protein proteinIl-1 Receptor Accessory Protein proteinIl-1racp proteinInterleukin-1 Receptor 3 proteinIl-1r-3 proteinIl-1r3 proteinIL1RAP proteinC3orf13 proteinIL1R3 protein |
Information sourced from Uniprot.org
