Recruitment of activated G protein-coupled receptors to pre-existing clathrin-coated pits in living cells - PubMed

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• PMID: 11602587
• DOI: 10.1074/jbc.M106586200

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Recruitment of activated G protein-coupled receptors to pre-existing clathrin-coated pits in living cells

Mark G H Scott et al. J Biol Chem. 2002.

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Abstract

The process of clathrin-mediated endocytosis tightly regulates signaling of the superfamily of seven-transmembrane G protein-coupled receptors (GPCRs). A fundamental question in the cell biology of membrane receptor endocytosis is whether activated receptors can initiate the formation of clathrin-coated pits (CPs) or whether they are simply mobilized to pre-existing CPs. Here, using various approaches, including a dynamic assay to monitor the distribution of CPs and GPCR-beta-arrestin complexes in live HeLa cells, we demonstrate for the first time that activated GPCRs do not initiate the de novo formation of CPs but instead are targeted to pre-existing CPs.

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