Article (Scientific journals)
Controlling microbial co-culture based on substrate pulsing can lead to stability through differential fitness advantages.
Martinez Alvarez, Juan Andrés; Delvenne, Mathéo; Henrion, Lucas et al.
2022In PLoS Computational Biology, 18 (10), p. 1010674
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Keywords :
Glucose; Coculture Techniques; Bioreactors; Computer Simulation; Escherichia coli/metabolism; Saccharomyces cerevisiae/metabolism; Glucose/metabolism; Bioprocesses; Co-cultures; Diauxic shift; Functional properties; Interaction mechanisms; Metabolic products; Microbial communities; Microbial consortium; Microbial species; Performance; Escherichia coli; Saccharomyces cerevisiae; Ecology, Evolution, Behavior and Systematics; Modeling and Simulation; Ecology; Molecular Biology; Genetics; Cellular and Molecular Neuroscience; Computational Theory and Mathematics
Abstract :
[en] Microbial consortia are an exciting alternative for increasing the performances of bioprocesses for the production of complex metabolic products. However, the functional properties of microbial communities remain challenging to control, considering the complex interaction mechanisms occurring between co-cultured microbial species. Indeed, microbial communities are highly dynamic and can adapt to changing environmental conditions through complex mechanisms, such as phenotypic diversification. We focused on stabilizing a co-culture of Saccharomyces cerevisiae and Escherichia coli in continuous cultures. Our preliminary data pointed out that transient diauxic shifts could lead to stable co-culture by providing periodic fitness advantages to the yeast. Based on a computational toolbox called MONCKS (for MONod-type Co-culture Kinetic Simulation), we were able to predict the dynamics of diauxic shift for both species based on a cybernetic approach. This toolbox was further used to predict the frequency of diauxic shift to be applied to reach co-culture stability. These simulations were successfully reproduced experimentally in continuous bioreactors with glucose pulsing. Finally, based on a bet-hedging reporter, we observed that the yeast population exhibited an increased phenotypic diversification process in co-culture compared with mono-culture, suggesting that this mechanism could be the basis of the metabolic fitness of the yeast.
Disciplines :
Biotechnology
Author, co-author :
Martinez Alvarez, Juan Andrés  ;  Université de Liège - ULiège > Département GxABT > Microbial technologies
Delvenne, Mathéo  ;  Université de Liège - ULiège > TERRA Research Centre
Henrion, Lucas  ;  Université de Liège - ULiège > TERRA Research Centre
Moreno, Fabian;  TERRA Research and Teaching Centre, Microbial Processes and Interactions (MiPI), Gembloux Agro-Bio Tech, University of Liége, Gembloux, Belgium
Telek, Samuel  ;  Université de Liège - ULiège > Département GxABT > Microbial technologies
Dusny, Christian;  Microscale Analysis and Engineering, Department of Solar Materials, Helmholtz-Centre for Environmental Research- UFZ Leipzig, Leipzig, Germany
Delvigne, Frank  ;  Université de Liège - ULiège > TERRA Research Centre > Microbial technologies
Language :
English
Title :
Controlling microbial co-culture based on substrate pulsing can lead to stability through differential fitness advantages.
Publication date :
October 2022
Journal title :
PLoS Computational Biology
ISSN :
1553-734X
eISSN :
1553-7358
Publisher :
Public Library of Science, United States
Volume :
18
Issue :
10
Pages :
e1010674
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
EU - European Union [BE]
Wallonia [BE]
Saxon State Parliament [DE]
F.R.S.-FNRS - Fund for Scientific Research [BE]
Funding text :
This project was supported through different research grants. First, we would like to thank the Era-Cobiotech established based on the H2020 European framework for providing funding (Contibio and ComRaDes projects). Wallonia is also gratefully acknowledged for financial support. This measure is co-financed with tax funds on the basis of the budget passed by the Saxon state parliament. JAM is supported by a post-doctoral grant (Contibio project). FM is supported by a postdoctoral grant (Sunup project, supported by Wallonia). LH is supported by a FRIA PhD grant provided by the Belgian Fund for Scientific Research (FNRS). MD is supported by a PhD grant provided by the Belgian Fund for Scientific Research (FNRS) in the context of an Era-Net Aquatic Pollutant project (ARENA). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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