Enables protein kinase binding activity and transmembrane transporter binding activity. A structural constituent of cytoskeleton. Involved in paranodal junction assembly and response to methylmercury. Located in several cellular components, including cytoskeleton; membrane raft; and neuron projection. Biomarker of transient cerebral ischemia. Human ortholog(s) of this gene implicated in ankyrin-B-related cardiac arrhythmia; atrial fibrillation; long QT syndrome; and sick sinus syndrome. Orthologous to human ANK2 (ankyrin 2). [provided by Alliance of Genome Resources, Apr 2022]