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Updated: Aug 22, 2025

Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
Published on: June 9, 2017
The interaction, mechanism and function of GPR158-RGS7 cross-talk
Shradha V Darira1, Laurie P Sutton1
1Department of Biological Sciences, University of Maryland Baltimore County, Baltimore, MD, United States.
The G protein-coupled receptor 158 (GPR158) interacts with regulator of G protein signaling 7 (RGS7), influencing stress-induced depression. Their complex structure and function are key to understanding stress modulation in the brain.
Area of Science:
- Neuroscience
- Molecular Biology
- Biochemistry
Background:
- G protein-coupled receptor 158 (GPR158) is an orphan receptor broadly expressed in the brain.
- GPR158 uniquely interacts with regulator of G protein signaling 7 (RGS7), enhancing its expression, localization, and activity.
Approach:
- Utilized cryo-electron microscopy (cryo-EM) to determine the structure of GPR158 alone and in complex with RGS7.
- Reviewed the signaling mechanisms and functions of the GPR158-RGS7 complex.
Key Points:
- The GPR158-RGS7 complex is regulated by chronic stress.
- This complex modulates stress-induced depression.
- Cryo-EM revealed the structural basis of the GPR158-RGS7 interaction.
Conclusions:
- The GPR158-RGS7 complex plays a critical role in the brain's response to stress.
- Understanding GPCR-RGS complexes offers new insights into neurological disorders like depression.
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