May regulate ciliary A-tubule number and, along with arl-13, controls cilium integrity. Accumulates at the ciliary base, proximal to the transition zone, and within the proximal ciliary axoneme (middle segment and transition zone) (PubMed:26714646). Does not undergo processive movement within the ciliary axonemes or the neuronal processes (PubMed:26714646). Expressed in most ciliated neuronal cells (PubMed:26714646). Not expressed in non-ciliated cells (PubMed:26714646). No obvious phenotype. Ultrastructural analyses reveal disruption of ciliary microtubule load and organization, although various aspects of gross cilium length, function and transport are mostly normal.