Predicted to enable identical protein binding activity. Acts upstream of or within flagellated sperm motility; regulation of protein phosphorylation; and sperm capacitation. Located in motile cilium. Is expressed in several structures, including heart; liver; lung; reproductive system; and spleen. Orthologous to human ROPN1L (rhophilin associated tail protein 1 like). [provided by Alliance of Genome Resources, Apr 2022]