Enables protein kinase binding activity. Involved in clathrin-dependent endocytosis. Located in filopodium tip. Part of AP-2 adaptor complex. Is expressed in brain; cranial ganglion; dorsal root ganglion; and liver. Orthologous to human AP2A1 (adaptor related protein complex 2 subunit alpha 1). [provided by Alliance of Genome Resources, Apr 2022]