Related Experiment Video
Updated: Oct 20, 2026
Unravelling the Function of a Bacterial Effector from a Non-cultivable Plant Pathogen Using a Yeast Two-hybrid Screen
Published on: January 20, 2017
Differential sensitivity to 5-fluoro-orotic acid as a screen for bait RNA-independent false positives in a yeast
1Department of Microbiology, University of Washington, Seattle, WA 98195, USA.
Abstract:
The yeast three-hybrid system presents a valuable tool for detecting and analyzing RNA-protein interactions in vivo. A major drawback of the use of such a transcriptional reporter-based assay in a library screen is the frequent occurrence of false-positive results due to bait RNA-independent activation of the reporter gene. To minimize the isolation of false positives in three-hybrid library screens, we incorporated a rapid and simple procedure based on differential sensitivity to 5-fluoro-orotic acid. The technique effectively eliminates bait RNA-independent false positives and thus greatly enhances the efficiency of the yeast three-hybrid system.
Insights
The yeast three-hybrid system detects RNA-protein interactions. A new 5-fluoro-orotic acid method reduces false positives, improving screening efficiency for RNA-binding proteins.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- The yeast three-hybrid system is a powerful method for studying RNA-protein interactions in living cells.
- A significant limitation is the high rate of false positives, often caused by activation of reporter genes independent of the bait RNA.
Purpose of the Study:
- To develop a method to reduce false-positive results in yeast three-hybrid library screens.
- To enhance the efficiency and reliability of RNA-protein interaction detection.
Main Methods:
- Implementation of a screening procedure utilizing differential sensitivity to 5-fluoro-orotic acid.
- Application of this method to yeast three-hybrid library screens.
Main Results:
- The 5-fluoro-orotic acid-based procedure effectively eliminated false positives arising from bait RNA-independent reporter gene activation.
- The efficiency of yeast three-hybrid library screens was significantly improved.
Conclusions:
- The developed method provides a rapid and simple way to minimize false positives in yeast three-hybrid systems.
- This enhancement increases the accuracy and throughput of RNA-protein interaction studies.
