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Konstantinidis2021 - Persistence of mutants in a mutualistic microbial co-culture


ABSTRACT: This agent-based model is based on an adaptive laboratory evolution (ALE) experiment scenario of two mutually cross feeding strains of bacteria and yeast. The bacterial strain secretes vitamins for which the yeast strain is auxotrophic and the yeast strain secrets amino acids for which the bacterial strain is auxotrophic. In particular, the model simulates a situation where a mutation arises in the bacterial strain that results in the emergence of individuals (mutant bacteria) with a higher secretion of vitamins as compared to the wild type (WT). This increase in secretion comes with a cost in terms of fitness (growth rate) of the mutant bacteria. The model can be used to assess if this mutant is able to persist and increase in frequency in the cross-feeding community.

SUBMITTER: Eva Geissen  

PROVIDER: MODEL2106100001 | BioModels | 2022-08-01

REPOSITORIES: BioModels

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Adaptive laboratory evolution of microbial co-cultures for improved metabolite secretion.

Konstantinidis Dimitrios D   Pereira Filipa F   Geissen Eva-Maria EM   Grkovska Kristina K   Kafkia Eleni E   Jouhten Paula P   Kim Yongkyu Y   Devendran Saravanan S   Zimmermann Michael M   Patil Kiran Raosaheb KR  

Molecular systems biology 20210801 8


Adaptive laboratory evolution has proven highly effective for obtaining microorganisms with enhanced capabilities. Yet, this method is inherently restricted to the traits that are positively linked to cell fitness, such as nutrient utilization. Here, we introduce coevolution of obligatory mutualistic communities for improving secretion of fitness-costly metabolites through natural selection. In this strategy, metabolic cross-feeding connects secretion of the target metabolite, despite its cost t  ...[more]

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