May play a role in photoreceptor function. In the retinal photoreceptor cells, localizes at the connecting cilium, a thin bridge linking the cell body and the light-sensing outer segment. Expressed in retina photoreceptor cells (at protein level). O-glycosylated. O-mannosylated by POMT1 and POMT2 and elongated by POMGNT1. Belongs to the UPF0606 family. Probable cloning artifact.