Enables sodium channel regulator activity; transmembrane transporter binding activity; and tubulin binding activity. Involved in several processes, including learning or memory; nervous system development; and regulation of cardiac muscle cell action potential involved in regulation of contraction. Located in several cellular components, including growth cone; intercalated disc; and lateral plasma membrane. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; peripheral nervous system; and sensory organ. Used to study intellectual disability. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy. Orthologous to human FGF13 (fibroblast growth factor 13). [provided by Alliance of Genome Resources, Apr 2022]