Abstract
The interaction of G protein–coupled receptors (GPCRs) with heterotrimeric G proteins plays a critical role in signal transduction processes, and multiple GPCR–G protein complexes reconstituted in detergent micelles have been visualized using cryo-EM. A new study reports the structure of neurotensin receptor 1 (NTSR1) in complex with the heterotrimeric Gi protein, assembled in a lipid environment using circularized nanodiscs. The structure sheds light on how the lipid context may influence receptor–G protein coupling and activation.
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