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Modified Yeast-Two-Hybrid System to Identify Proteins Interacting with the Growth Factor Progranulin
Published on: January 17, 2012
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A modified yeast three-hybrid system enabling both positive and negative selections
Christopher P Wallis1, Aleksandra Filipovska1,2, Oliver Rackham3,4
1Harry Perkins Institute of Medical Research and Centre for Medical Research, The University of Western Australia, Nedlands, 6009, Australia.
Biotechnology Letters
|May 20, 2018
Summary
Researchers enhanced the yeast three-hybrid system for detecting RNA-protein interactions. New versions offer increased sensitivity and negative selection capabilities, expanding its utility in molecular biology research.
Area of Science:
- Molecular Biology
- Biochemistry
- Genetics
Background:
- The yeast three-hybrid system is a powerful tool for studying RNA-protein interactions.
- Enhancements are needed to broaden the system's dynamic range and introduce negative selection.
Purpose of the Study:
- To develop novel yeast three-hybrid systems with an expanded reporter repertoire.
- To incorporate a negative selection option for improved detection accuracy.
Main Methods:
- Modified the MS2 coat RNA-binding protein and fused it to the Gal4 DNA-binding protein.
- Introduced specific mutations (V29I, N55K) and an 11 amino acid deletion into the MS2 construct.
- Utilized yeast strains MaV204K and PJ69-2A for enhanced reporter capabilities.
Main Results:
- Developed two new yeast three-hybrid system versions capable of detecting RNA-protein interactions with varying affinities.
- Enabled detection using histidine auxotrophy and negative selection with 5-fluoroorotic acid.
- Demonstrated increased dynamic range for detectable binding interactions.
Conclusions:
- The modified yeast three-hybrid systems offer significant advantages over previous versions.
- The enhanced systems provide a broader dynamic range for detecting RNA-protein interactions.
- The inclusion of negative selection improves the system's versatility and accuracy.
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