Enables identical protein binding activity. Acts upstream of or within cell-cell adhesion and negative regulation of protein phosphorylation. Located in plasma membrane and slit diaphragm. Is expressed in several structures, including central nervous system; genitourinary system; nasal epithelium; pancreas; and retina. Orthologous to human KIRREL2 (kirre like nephrin family adhesion molecule 2). [provided by Alliance of Genome Resources, Apr 2022]