Multiple GPCR Functional Assays Based on Resonance Energy Transfer Sensors

Area of Science:

• Biochemistry
• Molecular Biology
• Pharmacology

Background:

• G protein-coupled receptors (GPCRs) are a large family of membrane proteins crucial for physiological and pathological processes.
• GPCR activation involves conformational changes that mediate interactions with downstream signaling partners like G proteins and β-arrestins.

Purpose of the Study:

• To summarize the optimization of Förster resonance energy transfer (FRET) and bioluminescence resonance energy transfer (BRET) sensors for monitoring GPCR conformational dynamics.
• To highlight advancements in labeling strategies for enhanced sensor sensitivity and compatibility across diverse GPCR classes.
• To present solutions for functional assays facilitating high-throughput drug screening targeting GPCRs.

Main Methods:

• Utilizing Förster resonance energy transfer (FRET) and bioluminescence resonance energy transfer (BRET) sensor technologies.
• Employing various labeling strategies for GPCRs, G proteins, and β-arrestins.
• Developing and optimizing functional assays for GPCR activity monitoring.

Main Results:

• Optimized FRET and BRET sensors demonstrate increased sensitivity and broader compatibility for studying various GPCR classes.
• Advanced labeling strategies enhance the ability to monitor GPCR conformational changes and interactions.
• Functional assays are refined for efficient high-throughput screening of GPCR-targeted drugs.

Conclusions:

• FRET and BRET sensors are powerful tools for dissecting GPCR conformational dynamics and signaling.
• Sensor optimization and advanced labeling strategies are critical for robust GPCR functional assays.
• These advancements provide effective solutions for accelerating drug discovery and development for GPCR-related diseases.