disease:Defects in RGS9BP are a cause of prolonged electroretinal response suppression (PERRS) [MIM:608415]; also known as bradyopsia. PERRS is characterized by difficulty adjusting to sudden changes in luminance levels mediated by cones.,function:Regulator of G protein-coupled receptor (GPCR) signaling in phototransduction. Participates to the recovery phase of visual transduction via its interaction with RGS9-1 isoform. Acts as a membrane-anchor that mediates the targeting of RGS9-1 to the photoreceptor outer segment, where phototransduction takes place. Enhances the ability of RGS9-1 to stimulate G protein GTPase activity, allowing the visual signal to be terminated on the physiologically time scale. It also controls the proteolytic stability of RGS9-1, probably by protecting it from degradation.,similarity:Belongs to the RGS7BP/RGS9BP family.,subunit:Specifically interacts with isoform RGS9-1 of RGS9. Component of the RGS9-1-Gbeta5 complex composed of RGS9-1, Gbeta5 (GNB5) and RGS9BP.,
Membrane ; Single-pass type IV membrane protein .