Enables carbohydrate binding activity and virion binding activity. Involved in axon guidance; regulation of synapse assembly; and viral entry into host cell. Located in several cellular components, including dendrite; growth cone membrane; and synapse. Human ortholog(s) of this gene implicated in cleft lip; cleft lip-palate-ectodermal dysplasia syndrome; cleft palate; and ectodermal dysplasia. Orthologous to human NECTIN1 (nectin cell adhesion molecule 1). [provided by Alliance of Genome Resources, Apr 2022]