Predicted to enable cell adhesion molecule binding activity and protein homodimerization activity. Predicted to be involved in establishment of protein localization to plasma membrane; heterophilic cell-cell adhesion via plasma membrane cell adhesion molecules; and homophilic cell adhesion via plasma membrane adhesion molecules. Predicted to act upstream of or within several processes, including camera-type eye morphogenesis; fertilization; and protein localization to cell junction. Located in axon; dendrite; and synapse. Orthologous to human NECTIN3 (nectin cell adhesion molecule 3). [provided by Alliance of Genome Resources, Apr 2022]