Acts upstream of or within several processes, including embryonic digit morphogenesis; neuroepithelial cell differentiation; and smoothened signaling pathway. Located in ciliary membrane and ciliary transition zone. Part of MKS complex. Is expressed in embryo. Human ortholog(s) of this gene implicated in Joubert syndrome 20 and Meckel syndrome. Orthologous to human TMEM231 (transmembrane protein 231). [provided by Alliance of Genome Resources, Apr 2022]