Involved in cilium assembly and protein localization to ciliary transition zone. Acts upstream of or within several processes, including animal organ development; cilium assembly; and neural tube closure. Located in ciliary transition zone. Part of MKS complex. Used to study Meckel syndrome and visceral heterotaxy. Human ortholog(s) of this gene implicated in Joubert syndrome 9; Meckel syndrome 6; and intellectual disability. Orthologous to human CC2D2A (coiled-coil and C2 domain containing 2A). [provided by Alliance of Genome Resources, Apr 2022]