ID:IL1AP_HUMAN DESCRIPTION: RecName: Full=Interleukin-1 receptor accessory protein; Short=IL-1 receptor accessory protein; Short=IL-1RAcP; AltName: Full=Interleukin-1 receptor 3; Short=IL-1R-3; Short=IL-1R3; Flags: Precursor; FUNCTION: Coreceptor with IL1R1. 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. Secreted forms (isoforms 2 and 3) associate with secreted ligand-bound IL1R2 and increase the affinity of secreted IL1R2 for IL1B; this complex formation may be the dominant mechanism for neutralization of IL1B by secreted/soluble receptors. SUBUNIT: The interleukin-1 receptor complex is a heterodimer of IL1R1 and IL1RAP. Associates with IL1R2 to form a non-signaling interleukin-1 receptor complex. SUBCELLULAR LOCATION: Isoform 1: Cell membrane; Single-pass type I membrane protein. SUBCELLULAR LOCATION: Isoform 2: Secreted. SUBCELLULAR LOCATION: Isoform 3: Secreted. TISSUE SPECIFICITY: Detected in liver, skin, placenta, thymus and lung. INDUCTION: Isoform 1 is down-regulated by phorbol ester treatment. Isoform 2 is induced by phorbol ester treatment. SIMILARITY: Belongs to the interleukin-1 receptor family. SIMILARITY: Contains 3 Ig-like C2-type (immunoglobulin-like) domains. SIMILARITY: Contains 1 TIR domain.
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q9NPH3
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
US Server
Sequence and Links to Tools and Databases 
Common Gene Haplotype Alleles 
