Conserved structural elements in Gα subunit switch regions are necessary for efficient inactivation by RGS proteins.
Heterotrimeric G proteins (αβγ) function as molecular switches that regulate intracellular signaling downstream of G protein-coupled receptors (GPCRs). Gα subunits cycle between an inactive GDP-bound state and an active GTP-bound state that engages downstream effectors. The duration of Gα-mediated signaling is primaril...