Enables spectrin binding activity. Predicted to be involved in actin cytoskeleton reorganization. Predicted to act upstream of or within actin filament capping. Located in several cellular components, including cuticular plate; fascia adherens; and lateral plasma membrane. Is active in paranodal junction. Is expressed in gut; nervous system; and sensory organ. Human ortholog(s) of this gene implicated in developmental and epileptic encephalopathy 5. Orthologous to human SPTAN1 (spectrin alpha, non-erythrocytic 1). [provided by Alliance of Genome Resources, Apr 2022]