Related Experiment Videos
A chimeric transactivator allows tetracycline-responsive gene expression in whole plants
P Weinmann1, M Gossen, W Hillen
1Institut für Genbiologische Forschung Berlin GmbH, Germany.
The Plant Journal : for Cell and Molecular Biology
|April 1, 1994
Summary
Researchers developed a novel gene expression system in transgenic tobacco plants using a chimeric transcriptional activator (tTA). This system allows precise control over gene expression, enabling the study of gene products and molecule stability.
Area of Science:
- Molecular Biology
- Plant Biotechnology
- Gene Regulation
Background:
- The Tet-Off system offers inducible gene expression control.
- Transgenic plants require robust and specific gene regulation tools.
Purpose of the Study:
- To establish a tetracycline-inducible gene expression system in transgenic tobacco.
- To assess the stringency and applicability of the tTA system for gene regulation.
Main Methods:
- Stable expression of the chimeric transcriptional activator (tTA) in tobacco.
- Utilizing a promoter with Tet operators and a TATA-box to drive GUS reporter gene expression.
- Administering tetracycline to modulate tTA binding and gene expression.
Main Results:
- tTA successfully stimulated transcription of the beta-glucuronidase (gus) gene.
- Tetracycline effectively reduced gus expression across several orders of magnitude.
- The system demonstrated high stringency and rapid inactivation of tTA.
Conclusions:
- The tTA system provides a highly regulatable and specific method for gene expression in plants.
- This system is suitable for expressing potentially lethal gene products and studying RNA/protein stability.