Conformational specificity of opioid receptors is determined by subcellular location irrespective of agonist

The prevailing model for the variety in drug responses is that they stabilize distinct active states of their G protein-coupled receptor (GPCR) targets, allowing coupling to different effectors. However, whether the same ligand generates different GPCR active states based on the immediate environmen...

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Bibliographic Details
Published in:eLife 2021-05, Vol.10
Main Authors: Crilly, Stephanie E, Ko, Wooree, Weinberg, Zara Y, Puthenveedu, Manojkumar A
Format: Article
Language:English
Subjects:
Bias
Biosensors
Cell Biology
Detectors
G protein-coupled receptors
G proteins
Golgi apparatus
GPCR
Hypotheses
Ligands
Membrane proteins
Microscopy
Narcotics
Opioid receptors
organelle
Plasma
Proteins
Recruitment
Sensors
signaling
spatial encoding
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Summary:The prevailing model for the variety in drug responses is that they stabilize distinct active states of their G protein-coupled receptor (GPCR) targets, allowing coupling to different effectors. However, whether the same ligand generates different GPCR active states based on the immediate environment of receptors is not known. Here we address this question using spatially resolved imaging of conformational biosensors that read out distinct active conformations of the δ-opioid receptor (DOR), a physiologically relevant GPCR localized to Golgi and the surface in neuronal cells. We show that Golgi and surface pools of DOR both inhibit cAMP, but engage distinct conformational biosensors in response to the same ligand in rat neuroendocrine cells. Further, DOR recruits arrestins on the surface but not the Golgi. Our results suggest that the local environment determines the active states of receptors for any given drug, allowing GPCRs to couple to different effectors at different subcellular locations.
ISSN:2050-084X
2050-084X
DOI:10.7554/eLife.67478