protein_function: Receptor for IL1A, IL1B and IL1RN. After binding tointerleukin-1 associates with the corecptor IL1RAP to form thehigh affinity interleukin-1 receptor complex which mediatesinterleukin-1-dependent activation of NF-kappa-B, MAPK and otherpathways. Signaling involves the recruitment of adapter moleculessuch as TOLLIP, MYD88, and IRAK1 or IRAK2 via the respective TIRdomains of the receptor,coreceptor subunits. Binds ligands withcomparable affinity and binding of antagonist IL1RN preventsassociation with IL1RAP to form a signaling complex..
Interleukin 1 receptor, type I(IL1R1), also known as CD121a(Cluster of Differentiation 121a), is an interleukin receptor. The protein encoded by this gene is a cytokine receptor that belongs to the interleukin-1 receptor family. IL1R1 along with interleukin 1 receptor, type II(IL1R2), interleukin 1 receptor-like 2(IL1RL2), and interleukin 1 receptor-like 1(IL1RL1) form a cytokine receptor gene cluster in a region mapped to chromosome 2q12. This protein is a receptor for interleukin 1 alpha(IL1A), interleukin 1 beta(IL1B), and interleukin 1 receptor antagonist(IL1RA). It is an important mediator involved in many cytokine induced immune and inflammatory responses.