Predicted to enable Roundabout binding activity; glycosaminoglycan binding activity; and signaling receptor activity. Predicted to be involved in negative chemotaxis; negative regulation of axon regeneration; and nervous system development. Located in external side of plasma membrane and membrane raft. Is anchored component of plasma membrane. Orthologous to human RTN4RL1 (reticulon 4 receptor like 1). [provided by Alliance of Genome Resources, Apr 2022]