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- W3009538425 abstract "Abstract The release of toxins is one mechanism used by bacterial species to establish dominance over competitors, but how the dynamics of toxin expression determine the competitive success of a toxin-producing population is largely unknown. Here, we investigate how the expression dynamics of ColicinE2 – a toxic bacteriocin – affect competition between toxin-producing and toxin-sensitive strains of Escherichia coli . We demonstrate that, in addition to genetic modifications in the toxin expression system, alterations of the growth medium can be used to modulate the timing of toxin production and the amount of toxin released. Thus cells that release the toxin at later times can accumulate more colicin. In experiments, we found that delaying toxin release does not significantly alter competition outcome. However, our theoretical analysis allowed us to assess the relative contributions of release time and toxin level to the competitive success of the producer strain, that might counteract each other in experiments. The results reveal that the importance of delaying toxin release lies in increasing the toxin amount. This is a more effective strategy for the toxin-producing strain than prompt discharge of the colicin. In summary, our study shows how the toxin release dynamics influence the competitive success of the toxin-producing bacterial population." @default.
- W3009538425 created "2020-03-13" @default.
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- W3009538425 date "2020-03-04" @default.
- W3009538425 modified "2023-09-25" @default.
- W3009538425 title "Dynamics of ColicinE2 production and release determine the competitive success of a toxin-producing bacterial population" @default.
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- W3009538425 doi "https://doi.org/10.1038/s41598-020-61086-z" @default.
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