Predicted to enable microtubule binding activity and small GTPase binding activity. Predicted to be involved in flagellated sperm motility. Predicted to be located in motile cilium. Predicted to be active in Golgi apparatus and microtubule. Is expressed in chordotonal neurons; spermatogonium; and spermatozoon. Human ortholog(s) of this gene implicated in primary ciliary dyskinesia 33. Orthologous to human GAS8 (growth arrest specific 8).