Involved in vision. Interacts with RHO/rhodopsin; the interaction promotes PRCD stability. Localizes to photoreceptor disk membranes in the photoreceptor outer segment (PubMed:27613864). The secretion in media described in PubMed:24992209 is probably an experimental artifact (PubMed:24992209). Palmitoylated at Cys-2 (PubMed:27613864). Palmitoylation is essential for protein stability and trafficking to the photoreceptor outer segment, but does not appear to be essential for membrane localization (PubMed:27613864). Probably palmitoylated by ZDHHC3 (PubMed:27613864). Phosphorylated. The disease is caused by variants affecting the gene represented in this entry. Belongs to the PRCD family.