Involved in the regulation of cell migration (PubMed:29053796). May be involved in mediating the organization of the parallel fibers of granule cells during cerebellar development (PubMed:12213440). Homodimer. Localized at adhesion zippers (early state of adherens junctions) of keratinocytes. Cerebellum-specific expression. Expressed in thin parallel fibers of cerebellar granule cells. In the developing cerebellum, expressed in granule cells in the inner external germinal layer and in migrating granule cells whereas proliferating cells in the outer extessornal germinal layer did not shown expression. Expression levels in the internal granule cell layer peak during the third postnatal week and remain considerably high in the adult cerebellum.