Regulator of G-protein signaling 9-binding protein (Rgs9bp)

Regulator of G protein-coupled receptor (GPCR) signaling in phototransduction. Participates in the recovery period of visual transduction via its interaction with RGS9-1 isoform.

Acts as a membrane-anchor that mediates the targeting of RGS9-1 into the photoreceptor outer segment, where phototransduction occurs. Enhances the capacity of RGS9-1 to stimulate G protein GTPase activity, allowing the visual signal to be terminated on the physiologically time scale.