Enables signaling receptor binding activity. Involved in heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules; nervous system development; and positive regulation of nervous system development. Located in cell surface and dendrite. Is expressed in central nervous system; dorsal root ganglion; eye; lung; and trigeminal nerve. Human ortholog(s) of this gene implicated in intellectual disability and non-syndromic X-linked intellectual disability 21. Orthologous to human IL1RAPL1 (interleukin 1 receptor accessory protein like 1). [provided by Alliance of Genome Resources, Apr 2022]