As component of the IFT complex A (IFT-A), a complex required for retrograde ciliary transport and entry into cilia of G protein-coupled receptors (GPCRs), it is involved in cilia function and/or assembly . Essential for functional IFT-A assembly and ciliary entry of GPCRs . Associates with the BBSome complex to mediate ciliary transport (By similarity).
Subcellular locations: Cell projection, Cilium, Cytoplasm, Cytoskeleton, Cilium basal body, Cell projection, Cilium, Photoreceptor outer segment, Cell projection, Cilium, Flagellum
Localizes to photoreceptor connecting cilia, to the base of motile cilia in brain ependymal cells and to the base of and along primary cilia in kidney cells. Localizes at the sperm neck and flagellum .
Some isoforms are tissue-specific. Highly expressed in the prostate. Lower expression in the cerebellum, pituitary gland, fetal lung, and pancreas. In normal prostate, expressed in both basal and luminal epithelial cells. No expression detected in fibromuscular stromal cells, endothelial cells, or infiltrating lymphocytes. Uniformed expression in prostate adenocarcinoma cells.