| Literature DB >> 25605726 |
Nikoleta G Tsvetanova1, Roshanak Irannejad1, Mark von Zastrow2.
Abstract
Some G protein-coupled receptors (GPCRs), in addition to activating heterotrimeric G proteins in the plasma membrane, appear to elicit a "second wave" of G protein activation after ligand-induced internalization. We briefly summarize evidence supporting this view and then discuss what is presently known about the functional significance of GPCR-G protein activation in endosomes. Endosomal activation can shape the cellular response temporally by prolonging its overall duration, and may shape the response spatially by moving the location of intracellular second messenger production relative to effectors.Keywords: Cell Signaling; Cyclic AMP (cAMP); Endocytosis; Endosome; G Protein; G Protein-coupled Receptor (GPCR); Protein Sorting; Signal Transduction; Transcription
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Year: 2015 PMID: 25605726 PMCID: PMC4358092 DOI: 10.1074/jbc.R114.617951
Source DB: PubMed Journal: J Biol Chem ISSN: 0021-9258 Impact factor: 5.157