Related Experiment Video
Updated: Mar 6, 2026
09:27
Methodology for the Efficient Generation of Fluorescently Tagged Vaccinia Virus Proteins
Published on: January 17, 2014
8.0K
Method for rapid optimization of recombinant GPCR protein expression and stability using virus-like particles
Thao T Ho1, Jasmine T Nguyen1, Juping Liu2
1Department of Structural Biology, Dart Neuroscience, 12278 Scripps Summit Drive, San Diego, CA 92131, USA.
Protein Expression and Purification
|March 7, 2017
Summary
We developed a novel virus-like particle (VLP) method to rapidly screen hundreds of G protein-coupled receptor (GPCR) variants for improved stability and ligand binding. This accelerates GPCR drug discovery by streamlining protein optimization and reducing experimental time.
Area of Science:
- Biochemistry
- Structural Biology
- Pharmacology
Background:
- Stabilizing and crystallizing G protein-coupled receptors (GPCRs) is crucial for understanding their structure and function.
- Current methods for GPCR optimization are time-consuming, involving extensive screening of protein variants.
Purpose of the Study:
- To develop a versatile and efficient method for parallel screening of hundreds of GPCR variants.
- To reduce the time and resources required for GPCR construct optimization.
Main Methods:
- Utilized HEK293-produced virus-like particles (VLPs) for high-throughput screening of GPCR variants.
- Assessed VLP-based GPCRs for protein yield, stability, functionality, and ligand binding.
- Employed radiometric and label-free binding assays to screen GALR3-VLP variants.
Main Results:
- Successfully screened 210 GALR3-VLP variants for agonist binding and 88 for antagonist binding.
- Identified stabilizing variants that were subsequently used for recombinant protein expression.
- Demonstrated the utility of purified variants in surface plasmon resonance (SPR) binding assays.
Conclusions:
- The VLP-based screening method significantly accelerates GPCR optimization by bypassing traditional solubilization and purification steps.
- This approach is adaptable to various binding assay formats, facilitating GPCR research and drug discovery.
