Predicted to enable taste receptor binding activity. Predicted to be involved in endoplasmic reticulum tubular network organization and regulation of intracellular transport. Predicted to act upstream of or within protein transport into membrane raft; sensory perception of bitter taste; and sensory perception of sweet taste. Predicted to be located in cytoplasmic microtubule and endoplasmic reticulum membrane. Predicted to be integral component of plasma membrane. Human ortholog(s) of this gene implicated in hereditary spastic paraplegia 72. Orthologous to human REEP2 (receptor accessory protein 2). [provided by Alliance of Genome Resources, Apr 2022]