Involved in negative regulation of macrophage activation and regulation of presynapse assembly. Located in cell surface. Is active in GABA-ergic synapse and glutamatergic synapse. Is expressed in several structures, including central nervous system; dorsal root ganglion; and retina. Orthologous to human LRFN5 (leucine rich repeat and fibronectin type III domain containing 5). [provided by Alliance of Genome Resources, Apr 2022]