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Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance
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Convergent Evolution in Intracellular Elements: Plasmids as Model Endosymbionts.

Anne-Kathrin Dietel1, Martin Kaltenpoth2, Christian Kost3

  • 1Experimental Ecology and Evolution Research Group, Department of Bioorganic Chemistry, Max Planck Institute for Chemical Ecology, 07745 Jena, Germany.

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|April 14, 2018
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Summary

Bacterial endosymbionts and plasmids share similar evolved features due to residing within host cells. Plasmids offer a tractable model to study endosymbiotic interactions and evolution.

Keywords:
bacteria–insect interactionsconvergent evolutionendosymbiosisgenome evolutionmodel systemplasmids

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Area of Science:

  • Microbiology
  • Evolutionary Biology
  • Genetics

Background:

  • Endosymbionts are organisms living within host cells, common across diverse life forms including bacteria, eukaryotes, and plasmids.
  • These intracellular entities face similar environmental and selection pressures within the host cytoplasm.

Purpose of the Study:

  • To investigate convergent evolution between bacterial endosymbionts and plasmids.
  • To propose plasmids as a model system for studying endosymbiotic interactions.

Main Methods:

  • Comparative analysis of genetic and phenotypic features between bacterial endosymbionts and plasmids.
  • Theoretical modeling of selection pressures in intracellular environments.

Main Results:

  • Identified striking similarities in evolved features between bacterial endosymbionts and plasmids.
  • Demonstrated shared evolutionary trajectories under similar intracellular selection pressures.

Conclusions:

  • Plasmids can serve as simplified, experimentally tractable models for understanding complex endosymbiotic relationships.
  • This approach facilitates research into the ecology and evolution of host-endosymbiont systems.