Predicted to enable guanyl-nucleotide exchange factor activity. Involved in intraciliary transport. Acts upstream of or within cellular response to light stimulus; eye morphogenesis; and visual perception. Located in several cellular components, including ciliary basal body; photoreceptor distal connecting cilium; and sperm flagellum. Is expressed in several structures, including genitourinary system; nervous system; and sensory organ. Used to study X-linked cone-rod dystrophy 1 and retinitis pigmentosa 3. Human ortholog(s) of this gene implicated in X-linked atrophic macular degeneration; X-linked cone-rod dystrophy 1; X-linked retinitis pigmentosa and sinorespiratory infections; retinitis pigmentosa; and retinitis pigmentosa 3. Orthologous to human RPGR (retinitis pigmentosa GTPase regulator). [provided by Alliance of Genome Resources, Apr 2022]