Predicted to enable identical protein binding activity. Predicted to be involved in several processes, including flagellated sperm motility; protein localization to cilium; and sperm capacitation. Predicted to be located in sperm cytoplasmic droplet and sperm principal piece. Predicted to be active in cytoplasm and motile cilium. Orthologous to several human genes including ROPN1 (rhophilin associated tail protein 1). [provided by Alliance of Genome Resources, Apr 2022]