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Updated: Jun 16, 2025
07:41
A Kinetic Fluorescence-based Ca2+ Mobilization Assay to Identify G Protein-coupled Receptor Agonists, Antagonists, and Allosteric Modulators
Published on: February 20, 2018
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Designing Structure-specific and Switchable Allosteric Effectors for GPCRs Based on the Causality and Energetics of
Bingxue Dong1, Wei-Ven Tee1, Igor N Berezovsky2
1Bioinformatics Institute (BII), Agency for Science, Technology and Research (A*STAR), 30 Biopolis Street, #07-01, Matrix, 138671, Singapore.
Journal of Molecular Biology
|June 13, 2025
Summary
This study reveals allosteric signaling patterns across 280 G protein-coupled receptors (GPCRs), enabling the rational design of novel allosteric drugs. The developed computational framework addresses challenges with "difficult" GPCR targets, offering controllable drug effectors.
Area of Science:
- Biochemistry and Pharmacology
- Computational Biology and Cheminformatics
Background:
- G protein-coupled receptors (GPCRs) are crucial drug targets, but many lack candidates due to conserved orthosteric sites.
- Allosteric mechanisms are key to GPCR function and regulation, offering potential for novel therapeutic strategies.
Purpose of the Study:
- To explore allosteric signaling in GPCRs and develop a computational framework for designing allosteric drugs.
- To address challenges posed by conserved orthosteric sites in GPCR drug discovery.
- To enable rational design of allosteric effectors with controllable specificity and function.
Main Methods:
- Analysis of allosteric signaling in 280 GPCRs, including detailed study of chemokine receptors.
- Quantification of allosteric effects using case studies like ADRB2 and GLP1R.
- Implementation of a directed design protocol for allosteric drug candidate development.
Main Results:
- A comprehensive map of allosteric signaling across 280 GPCRs was generated.
- Switchable agonist-antagonist pairs were successfully designed for GLP1R.
- The framework demonstrated predictive power for identifying allosteric sites and designing novel effectors.
- Efficacy-based design showed that effector-induced allosteric signaling strength dictates target specificity.
Conclusions:
- The computational framework provides a foundation for targeting difficult GPCRs via allosteric modulation.
- Rational design of allosteric effectors with controllable mode switching and high structure-specificity is achievable.
- The AlloMAPS database offers comprehensive, single-residue resolution data on GPCR allosteric signaling.
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