Circuit-guided population acclimation of a synthetic microbial consortium for improved biochemical production

Chae Won Kang, Hyun Gyu Lim, Jaehyuk Won, Sanghak Cha, Giyoung Shin, Jae-Seong Yang, Jaeyoung Sung and Gyoo Yeol Jung ()
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Chae Won Kang: Pohang University of Science and Technology
Hyun Gyu Lim: Pohang University of Science and Technology
Jaehyuk Won: Chung-Ang University
Sanghak Cha: Pohang University of Science and Technology
Giyoung Shin: Pohang University of Science and Technology
Jae-Seong Yang: Centre for Research in Agricultural Genomics (CRAG), CSIC-IRTA-UAB-UB, Campus UAB, Bellaterra
Jaeyoung Sung: Chung-Ang University
Gyoo Yeol Jung: Pohang University of Science and Technology

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Microbial consortia have been considered potential platforms for bioprocessing applications. However, the complexity in process control owing to the use of multiple strains necessitates the use of an efficient population control strategy. Herein, we report circuit-guided synthetic acclimation as a strategy to improve biochemical production by a microbial consortium. We designed a consortium comprising alginate-utilizing Vibrio sp. dhg and 3-hydroxypropionic acid (3-HP)-producing Escherichia coli strains for the direct conversion of alginate to 3-HP. We introduced a genetic circuit, named “Population guider”, in the E. coli strain, which degrades ampicillin only when 3-HP is produced. In the presence of ampicillin as a selection pressure, the consortium was successfully acclimated for increased 3-HP production by 4.3-fold compared to that by a simple co-culturing consortium during a 48-h fermentation. We believe this concept is a useful strategy for the development of robust consortium-based bioprocesses.

Date: 2022
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DOI: 10.1038/s41467-022-34190-z

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