May regulate secretion and presynaptic differentiation through inhibition of the activity of N-type voltage-gated calcium channel. May activate the MAP kinase JNK. Plays a role in presynaptic and postsynaptic differentiation and dendritic spine formation in neurons. Defects in IL1RAPL1 are the cause of mental retardation X-linked type 21 (MRX21). Mental retardation is a mental disorder characterized by significantly sub-average general intellectual functioning associated with impairments in adaptative behavior and manifested during the developmental period. Non- syndromic mental retardation patients do not manifest other clinical signs. Belongs to the interleukin-1 receptor family. 1 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral; Receptor, misc.
Cellular Component: postsynaptic membrane; cell surface; axon; cytoplasm; dendrite; integral to membrane; plasma membrane
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.