Predicted to enable identical protein binding activity. Involved in several processes, including animal organ development; positive regulation of cellular component organization; and positive regulation of polarized epithelial cell differentiation. Acts upstream of or within several processes, including non-motile cilium assembly; photoreceptor cell outer segment organization; and retina development in camera-type eye. Located in microtubule organizing center and photoreceptor cell cilium. Part of MKS complex. Is expressed in several structures, including brain; ganglia; olfactory epithelium; retina; and trigeminal nerve. Used to study Joubert syndrome 3 and nephronophthisis. Human ortholog(s) of this gene implicated in Joubert syndrome 3; Joubert syndrome 4; and autism spectrum disorder. Orthologous to human AHI1 (Abelson helper integration site 1). [provided by Alliance of Genome Resources, Apr 2022]