Enables spectrin binding activity. Predicted to be involved in positive regulation of G protein-coupled receptor signaling pathway and positive regulation of epidermal growth factor receptor signaling pathway. Predicted to act upstream of or within positive regulation of MAPK cascade. Predicted to be active in photoreceptor outer segment membrane. Human ortholog(s) of this gene implicated in retinitis pigmentosa 57. Orthologous to human PDE6G (phosphodiesterase 6G). [provided by Alliance of Genome Resources, Apr 2022]