Acts upstream of or within cilium assembly; photoreceptor cell outer segment organization; and smoothened signaling pathway. Located in centriole and ciliary basal body. Is expressed in eye photoreceptor cell. Human ortholog(s) of this gene implicated in Joubert syndrome 23 and short-rib thoracic dysplasia 14 with polydactyly. Orthologous to human KIAA0586 (KIAA0586).