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Automation of yeast two-hybrid screening
R G Buckholz1, C A Simmons, J M Stuart
1Department of Molecular Endocrinology, Glaxo Wellcome Research Institute, Research Triangle Park, North Carolina 27709, USA.
Journal of Molecular Microbiology and Biotechnology
|August 15, 2000
Summary
We developed an automated yeast two-hybrid screening method for protein-protein interactions. This liquid array format efficiently identifies interactions in large-scale cDNA libraries, aiding proteome analysis.
Area of Science:
- Molecular Biology
- Biochemistry
- Proteomics
Background:
- Yeast two-hybrid (Y2H) screening is a key method for identifying protein-protein interactions.
- Traditional Y2H screening can be labor-intensive and challenging for large-scale library analysis.
Purpose of the Study:
- To develop an automated and scalable format for screening yeast two-hybrid libraries.
- To enhance the efficiency and throughput of protein-protein interaction discovery.
Main Methods:
- Developed a liquid array format for mating pooled yeast library subsets (expressing up to 1000 cDNAs) with a bait yeast strain.
- Utilized a liquid beta-galactosidase assay coupled with prototrophic selection for detecting interactions.
- Demonstrated the method using simulated libraries and screened complex cDNA libraries against nuclear receptor ligand-binding domains.
Main Results:
- Successfully detected interactions between yeast RNA polymerase subunits in simulated libraries.
- Identified known and novel putative interacting proteins from large-scale cDNA library screenings.
- The pooled subset formatting facilitated functional subtraction of promiscuous positives.
Conclusions:
- The automated liquid array format is effective for large-scale yeast two-hybrid screening.
- This method enables electronic data handling and automated sample processing for proteome-wide interaction studies.
- The approach significantly advances the capacity for high-throughput protein interaction discovery.