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Immunoglobulin-like family of IL-1 receptors C

Unless otherwise stated all data on this page refer to the human proteins. Gene information is provided for human (Hs), mouse (Mm) and rat (Rn).

Overview

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The immunoglobulin-like family of IL-1 receptors are heterodimeric receptors made up of a cognate receptor subunit and an IL-1 receptor accessory protein, IL1RAP (Q9NPH3, also known as C3orf13, IL-1RAcP, IL1R3). They are characterised by extracellular immunoglobulin-like domains and an intracellular Toll/Interleukin-1R (TIR) domain.

Receptors

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Complexes

Interleukin-1 receptor, type I C Show summary » More detailed page go icon to follow link

Interleukin-33 receptor C Show summary » More detailed page go icon to follow link

Interleukin-36 receptor C Show summary » More detailed page go icon to follow link

Interleukin-1 receptor, type II C Show summary » More detailed page go icon to follow link

Interleukin-18 receptor C Show summary » More detailed page go icon to follow link

Receptors and Subunits

Interleukin 1 receptor, type I C Show summary » More detailed page go icon to follow link

Interleukin 1 receptor, type II C Show summary » More detailed page go icon to follow link

Interleukin-1 receptor-like 1 C Show summary » More detailed page go icon to follow link

Interleukin-1 receptor-like 2 C Show summary » More detailed page go icon to follow link

Interleukin-18 receptor 1 C Show summary » More detailed page go icon to follow link

single Ig and TIR domain containing / IL-1R8 Show summary » More detailed page go icon to follow link

Accessory Proteins

IL-1 receptor accessory protein Show summary » More detailed page go icon to follow link

IL-18 receptor accessory protein Show summary » More detailed page go icon to follow link

Further reading

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References

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How to cite this family page

Database page citation:

Immunoglobulin-like family of IL-1 receptors. Accessed on 01/04/2026. IUPHAR/BPS Guide to PHARMACOLOGY, http://www.guidetopharmacology.org/GRAC/FamilyDisplayForward?familyId=312.

Concise Guide to PHARMACOLOGY citation:

Alexander SPH, Fabbro D, Peach CJ, Gibb AJ, Kelly E, Mathie AA, Veale EL, Armstrong JF, Faccenda E, Harding SD, Southan C, Davies JA et al. (2025) The Concise Guide to PHARMACOLOGY 2025/26: Catalytic receptors. Br J Pharmacol. 182: S259-S306.