Enables several functions, including cell adhesion molecule binding activity; insulin receptor binding activity; and protein kinase binding activity. Involved in axon guidance; myoblast fusion; and negative regulation of insulin receptor signaling pathway. Is expressed in several structures, including embryonic myoblast; embryonic/larval midgut primordium; ganglia; gut section; and presumptive embryonic/larval system. Orthologous to several human genes including NCK2 (NCK adaptor protein 2).