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An Optogenetic Method to Control and Analyze Gene Expression Patterns in Cell-to-cell Interactions
Published on: March 22, 2018
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Optogenetic control of Bacillus subtilis gene expression
Sebastian M Castillo-Hair1, Elliot A Baerman2, Masaya Fujita3
1Department of Bioengineering, Rice University, 6100 Main St., Houston, TX, 77005, USA.
Nature Communications
|July 17, 2019
Summary
Researchers engineered a novel optogenetic tool for Bacillus subtilis, enabling precise control over gene expression using light. This system enhances the study of complex bacterial gene regulation and future synthetic biology applications.
Area of Science:
- Synthetic Biology
- Microbiology
- Optogenetics
Background:
- Bacillus subtilis is a Gram-positive bacterium with intricate gene expression patterns.
- Existing optogenetic tools are not suitable for engineering Bacillus subtilis.
- Studying spatial and temporal gene expression in B. subtilis requires new tools.
Purpose of the Study:
- To engineer a functional optogenetic tool for Bacillus subtilis.
- To enable light-inducible control of gene expression in B. subtilis.
- To facilitate the study of complex gene regulatory processes in this bacterium.
Main Methods:
- Ported a cyanobacterial light-sensing pathway (CcaSR, PCB production enzymes) into B. subtilis.
- Optimized gene expression, enhanced chromophore production via translational fusion.
- Engineered a strong chimeric promoter and utilized a miniaturized photosensor kinase for improved dynamic range.
Main Results:
- Developed a functional optogenetic system in Bacillus subtilis.
- Achieved over 70-fold activation of gene expression with rapid response dynamics.
- Demonstrated successful engineering of synthetic biology pathways in B. subtilis.
Conclusions:
- The engineered optogenetic tool is effective for studying gene regulation in B. subtilis.
- The developed synthetic biology methods improve future engineering of B. subtilis.
- This tool opens new avenues for research in bacterial gene expression.
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