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Updated: May 18, 2026
09:45
Co-expression of Multiple Chimeric Fluorescent Fusion Proteins in an Efficient Way in Plants
Published on: July 1, 2018
Design of chimeric expression elements that confer high-level gene activity in chromoplasts
Rodrigo Caroca1, Katharine A Howell, Claudia Hasse
1Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476, Potsdam-Golm, Germany.
The Plant Journal : for Cell and Molecular Biology
|September 26, 2012
Summary
Scientists engineered tomato plastids to express genes at high levels. This overcomes limitations in non-green plastid gene expression, offering new tools for plant biotechnology and research.
Area of Science:
- Plant Biology
- Molecular Biology
- Biotechnology
Background:
- Non-green plastids like chromoplasts exhibit lower gene expression than chloroplasts.
- Gene expression suppression in chromoplasts involves complex transcriptional and translational control.
- The extent of regulation varies significantly between different plastid genes.
Purpose of the Study:
- To investigate if low gene expression in chromoplasts is due to inherent limitations.
- To determine if gene expression capacity can be enhanced by optimizing promoter and 5'-UTR combinations.
- To develop novel expression elements for high-level gene expression in chromoplasts.
Main Methods:
- Constructed chimeric expression elements combining promoters and 5'-UTRs from suppressed plastid genes.
- Introduced these elements into the tomato plastid genome via stable chloroplast transformation.
- Assessed gene expression levels using the reporter protein GFP.
Main Results:
- Identified specific promoter-UTR combinations enabling high-level gene expression in chromoplasts.
- Achieved reporter protein (GFP) accumulation up to 1% of total cellular protein.
- Demonstrated that non-green plastids can achieve substantial gene expression levels.
Conclusions:
- Non-green plastids possess the inherent capacity for high-level gene expression.
- Developed versatile chimeric cis-elements applicable to transplastomic research.
- These findings open new avenues for basic and applied research in plant plastid gene expression.
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