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Construction of bacteria-eukaryote synthetic mutualism
Isao Kubo1, Kazufumi Hosoda, Shingo Suzuki
1Department of Bioinformatic Engineering, Graduate School of Information Science and Technology, Osaka University, 1-5 Yamadaoka, Suita, Osaka 565-0871, Japan.
Bio Systems
|May 29, 2013
Summary
Scientists created the first synthetic bacteria-eukaryote mutualism. This study demonstrates how Escherichia coli and Dictyostelium discoideum established a novel symbiotic relationship by meeting each other
Area of Science:
- Synthetic ecology
- Microbiology
- Evolutionary biology
Background:
- Mutualism is common in nature but prone to disruption.
- Synthetic ecology proves novel mutualisms can form through encounters.
- Bacteria-eukaryote mutualism is ecologically significant but not yet synthetically constructed.
Purpose of the Study:
- To synthetically construct mutualism between a bacterium and a eukaryote.
- To investigate the conditions required for establishing novel bacteria-eukaryote symbiosis.
- To use model organisms to demonstrate the feasibility of creating new mutualistic relationships.
Main Methods:
- Utilized a genetically engineered bacterium, Escherichia coli (glutamine auxotroph), and the amoeba Dictyostelium discoideum.
- Cultured the organisms under 14 different conditions, testing for growth in monoculture versus coculture.
- Identified specific nutrient dependencies (lipoic acid and glutamine) that facilitated mutualistic growth.
Main Results:
- Established a stable synthetic mutualism between Escherichia coli and Dictyostelium discoideum under one specific condition.
- Demonstrated mutualistic growth where the bacterium provided lipoic acid and the amoeba provided glutamine.
- Observed continuous growth through multiple subcultures, indicating a successful establishment of symbiosis.
Conclusions:
- Successfully created the first synthetic bacteria-eukaryote mutualism using model organisms.
- The findings suggest that potentially mutualistic bacteria and eukaryotes in nature may frequently establish novel symbiotic relationships.
- This research provides a foundation for understanding the origins and stability of inter-domain mutualisms.
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