Enables identical protein binding activity. Acts upstream of or within glial cell development and retina development in camera-type eye. Predicted to be located in membrane. Predicted to be active in cell-cell junction and plasma membrane. Is expressed in several structures, including forebrain neural keel; forebrain neural rod; pectoral fin bud; ventral mesenchyme; and ventral mesoderm. Human ortholog(s) of this gene implicated in nephrotic syndrome type 23. Orthologous to human KIRREL1 (kirre like nephrin family adhesion molecule 1).