Involved in chemosensory behavior; cilium organization; and protein localization. Located in axoneme; ciliary basal body; and ciliary transition zone. Part of intraciliary transport particle B. Expressed in neurons. Used to study ciliopathy. Human ortholog(s) of this gene implicated in orofaciodigital syndrome. Is an ortholog of human IFT57 (intraflagellar transport 57).