| Modification Notes |
The regulators of G protein signaling (RGS proteins) bind directly to the G protein å (Gå) subunits in brain and other tissues to determine the strength, duration and fidelity of neurotransmitter receptor signaling. They also regulate the kinetics of the G protein signaling. Members of the R7 subfamily, part of the RGS family, bind to G∫ 5 (R7-G∫ 5) and shuttle between the plasma membrane and the nucleus with assistance from a shuttle protein, R7BP, in neurons. R7BP binds directly to R7-G∫ 5, and the protein complex becomes tethered to the plasma membrane by the addition of palmitate, a lipid, onto R7BP. Removal of palmitate results in the translocation of the R7BP-R7-G∫ 5 complex to the nucleus, presumably for nontraditional signaling functions. |