Dynamic localization of G proteins in Dictyostelium discoideum.

ABSTRACT: Extracellular stimuli exert their effects on eukaryotic cells via serpentine G-protein-coupled receptors and mediate a vast number of physiological responses. Activated receptors stimulate heterotrimeric G-proteins, consisting of three subunits, alpha, beta and gamma. In Dictyostelium discoideum, cAMP binds to the cAMP receptor cAR1, which is coupled to the heterotrimer containing the Galpha2 subunit. These studies provide in vivo evidence as to how receptors influence the localization of the G-protein complex prior to and after ligand binding. Previous work has shown that the state of the heterotrimer could be monitored by changes in fluorescence (or Förster) resonance energy transfer (FRET) between the alpha2- and beta-subunits of D. discoideum. We now report the kinetics of G-protein ac

SUBMITTER: Elzie CA 

PROVIDER: S-EPMC2909314 | biostudies-literature | 2009 Aug

REPOSITORIES: biostudies-literature