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Semin Cell Dev Biol. 2006 Jun;17(3):383-9. Epub 2006 Mar 16.

Cellular mechanisms that determine selective RGS protein regulation of G protein-coupled receptor signaling.

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Department of Pharmacology, Emory University School of Medicine, G205 Rollins Research Center, 1510 Clifton Road, Atlanta, GA 30322, USA.


Regulators of G protein signaling (RGS proteins) bind directly to activated Galpha subunits to inhibit their signaling. However, recent findings show that RGS proteins selectively regulate signaling by certain G protein-coupled receptors (GPCRs) in cells, irrespective of the coupled G protein. New studies support an emerging model that suggests RGS proteins utilize both direct and indirect mechanisms to form stable functional pairs with preferred GPCRs to selectively modulate the signaling functions of those receptors and linked G proteins. Here, we discuss these findings and their implications for established models of GPCR signaling.

[Indexed for MEDLINE]

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