The protein encoded by this gene, IL-1R8, is a member of the interleukin-1 receptor family and is similar to the interleukin 1 accessory proteins. It is most closely related to interleukin 1 receptor accessory protein-like 2 (IL1RAPL2). [7]
This gene and IL1RAPL2 are located at a region on chromosome X that is associated with X-linked non-syndromic intellectual disability. Deletions and mutations in this gene were found in patients with intellectual disability. This gene is expressed at a high level in post-natal brain structures involved in the hippocampal memory system, which suggests a specialized role in the physiological processes underlying memory and learning abilities.[7]