Ingénierie de consortia microbiens synthétiques de Bacillus subtilis à visée biotechnologique - INRAE - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
Poster De Conférence Année : 2022

Engineering of synthetic Bacillus subtilis microbial consortia for biotechnological purposes

Ingénierie de consortia microbiens synthétiques de Bacillus subtilis à visée biotechnologique

Résumé

Whether for the production of pharmaceuticals, biofuels, biochemicals or other high value compounds, synthetic biologists try to implement heterologous metabolic pathways in genetically modified organisms. However, the introduction of heterologous pathways into the host can result in a substantial metabolic burden that limits the overall productivity of the system. One solution to this limitation could be the use of mixed communities, in which subpopulations produce complementary enzymes that work jointly to fulfill a function of interest. This biomimetic strategy is called division of labor and is known to significantly improve the stability, robustness, and functionality of a community when compared to monocultures. Here, we build an engineered synthetic consortia aimed at degrading lignocellulose, which is the world’s largest agro-industrial by-product and could be turned into low-cost renewable feedstocks for bioproduction. To do so, we aim to split the heterologous pathway of interest into two strains of the workhorse Gram-positive bacterium Bacillus subtilis. To ensure the required stability of the consortium for the whole pathway of interest to be completed, we chose to make our strains dependent on each other for amino acids. Briefly, after selecting the most efficient amino acids complementation, we try to optimize this synergetic interaction by directed evolution and assess the efficiency of the division of labor. Finally, the development of a landing platform for modular cloning in the B. subtilis chromosome will allow easy and rapid adaptation of our consortium to any pathway of interest.
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Dates et versions

hal-04298531 , version 1 (21-11-2023)

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  • HAL Id : hal-04298531 , version 1

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Léa Wagner, Nathalie Laforge, Matthieu Jules, Anne-Gaëlle Planson. Ingénierie de consortia microbiens synthétiques de Bacillus subtilis à visée biotechnologique. Congrès junior pluridisciplinaire, Jun 2022, Gif-sur Yvette, France. ⟨hal-04298531⟩
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