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Updated: Aug 31, 2025
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Measuring G-protein-coupled Receptor Signaling via Radio-labeled GTP Binding
Published on: June 9, 2017
16.5K
Ligands can differentially and temporally modulate GPCR interaction with 14-3-3 isoforms.
Haifeng Eishingdrelo1, Xiaofa Qin1, Luwa Yuan1
1BioInvenu Corp., 50 Williams Parkway, Unit A2, East Hanover, NJ, 07936, USA.
Current Research in Pharmacology and Drug Discovery
|August 22, 2022
Summary
14-3-3 proteins regulate G protein-coupled receptor (GPCR) trafficking and signaling. This study reveals that GPCR/14-3-3 signals decrease during endocytosis, offering new therapeutic targets for GPCR drug development.
Area of Science:
- Cellular Biology
- Molecular Pharmacology
- Signal Transduction
Background:
- G protein-coupled receptors (GPCRs) are crucial cell surface receptors involved in numerous physiological processes.
- GPCR signaling relies on interactions with various proteins, including G proteins, β-arrestins, and 14-3-3 proteins, which influence trafficking and signal complex formation.
- Different 14-3-3 protein isoforms can interact with GPCRs, and these interactions can be modulated by agonist stimulation.
Purpose of the Study:
- To investigate the dynamic changes in GPCR/14-3-3 protein interactions during signaling.
- To explore the relationship between GPCR/14-3-3 signal dynamics and receptor endocytosis.
- To identify potential new strategies for GPCR-based drug development by targeting GPCR/14-3-3 signaling.
Main Methods:
- Utilized techniques to measure GPCR/14-3-3 and GPCR/β-arrestin-2 signal intensities over time.
- Analyzed agonist-induced changes in protein-protein interactions.
- Investigated the temporal regulation of GPCR/14-3-3 signals by specific GPCR ligands.
Main Results:
- Observed a rapid decrease in agonist-induced GPCR/14-3-3 signal intensity.
- Correlated the decrease in GPCR/14-3-3 signals with GPCR/β-arrestin-2 signals, suggesting diminished signal adaptor complexes during endocytosis.
- Demonstrated that certain GPCR ligands can temporally modulate GPCR/14-3-3 signals.
Conclusions:
- The temporal decrease in GPCR/14-3-3 signals may indicate complex dissociation or degradation during endocytosis.
- GPCR ligands can dynamically regulate GPCR/14-3-3 interactions.
- Modulating GPCR/14-3-3 signaling temporally presents a novel therapeutic avenue for GPCR drug development.
Keywords:
14-3-3 proteinsG-protein coupled receptor (GPCR)Protein-protein interactionReceptor traffickingSignal transductionMore Related Videos
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