Component of the tectonic-like complex, a complex localized at the transition zone of primary cilia and acting as a barrier that prevents diffusion of transmembrane proteins between the cilia and plasma membranes (By similarity). Involved in centrosome migration to the apical cell surface during early ciliogenesis. Required for ciliary structure and function, including a role in regulating length and appropriate number through modulating centrosome duplication. Required for cell branching morphology. Part of the tectonic-like complex (also named B9 complex) (By similarity). Interacts with TMEM107 (By similarity). Interacts with TCTN3, AHI1, TCTN1, TCTN2, CC2D2A (By similarity). Interacts with FLNA. Interacts with TMEM67 (By similarity). Interacts with B9D1 and B9D2 (By similarity). Localizes at the transition zone, a region between the basal body and the ciliary axoneme.