Predicted to enable microtubule binding activity. Predicted to be involved in endoplasmic reticulum tubular network organization. Predicted to be located in cytoplasmic microtubule; endoplasmic reticulum membrane; and endoplasmic reticulum tubular network. Human ortholog(s) of this gene implicated in distal hereditary motor neuronopathy type 5B; hereditary spastic paraplegia 31; and hereditary spastic paraplegia 72. Is an ortholog of human REEP1 (receptor accessory protein 1) and REEP4 (receptor accessory protein 4).