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Updated: Jul 9, 2026

A Kinetic Fluorescence-based Ca2+ Mobilization Assay to Identify G Protein-coupled Receptor Agonists, Antagonists, and Allosteric Modulators
Published on: February 20, 2018
Heterotrimeric G protein activation by G-protein-coupled receptors
William M Oldham1, Heidi E Hamm
1Department of Pharmacology, Vanderbilt University School of Medicine, 442 Robinson Research Building, 2222 Pierce Avenue, Nashville, TN 37232-6600, USA.
Abstract:
Heterotrimeric G proteins have a crucial role as molecular switches in signal transduction pathways mediated by G-protein-coupled receptors. Extracellular stimuli activate these receptors, which then catalyse GTP-GDP exchange on the G protein alpha-subunit. The complex series of interactions and conformational changes that connect agonist binding to G protein activation raise various interesting questions about the structure, biomechanics, kinetics and specificity of signal transduction across the plasma membrane.
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