Component of the transition zone in primary cilia. Required for ciliogenesis. Part of the tectonic-like complex (also named B9 complex). Interacts with TMEM107. Localizes at the proximal region of primary cilia were observed, consistent with localization to the transition zone. Anchored to the transition zone by RPGRIP1L. The disease is caused by variants affecting the gene represented in this entry. Belongs to the TMEM237 family.