Small GTP-binding protein which cycles between an inactive GDP-bound and an active GTP-bound form, and the rate of cycling is regulated by guanine nucleotide exchange factors (GEF) and GTPase-activating proteins (GAP). Required for normal cytokinesis and cilia signaling. Requires assistance from GTPase-activating proteins (GAPs) like RP2 and PDE6D, in order to cycle between inactive GDP-bound and active GTP-bound forms. Required for targeting proteins to the cilium, including myristoylated NPHP3 and prenylated INPP5E. Targets NPHP3 to the ciliary membrane by releasing myristoylated NPHP3 from UNC119B cargo adapter into the cilium (By similarity). Required for PKD1:PKD2 complex targeting from the trans-Golgi network to the cilium (By similarity).
Subcellular locations: Golgi apparatus membrane, Cytoplasm, Cytoskeleton, Spindle, Nucleus, Cytoplasm, Cytoskeleton, Microtubule organizing center, Centrosome, Cytoplasm, Cell projection, Cilium
Detected predominantly in the photoreceptor connecting cilium. Centrosome-associated throughout the cell cycle. Not detected to interphase microtubules. Present on the mitotic spindle (By similarity).