Regulator of G protein-coupled receptor (GPCR) signaling. Probably acts by regulating the activity of some 'R7' family protein (RGS6, RGS7, RGS9 and/or RGS11). Expressed in a variety of neuronal tissues, particularly in sensory cells including inner ear hair cells, photoreceptors and dorsal root ganglion neurons. Belongs to the RGS7BP/RGS9BP family.