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Plasmid‐chromosome crosstalks

Abstract : Plasmids can be acquired by recipient bacteria at a significant cost while conferring them advantageous traits. To counterbalance the costs of plasmid carriage, both plasmids and host bacteria have developed a tight regulatory network that may involve a cross-talk between the chromosome and the plasmids. Although plasmid regulation by chromosomal regulators is generally well known, chromosome regulation by plasmid has been far less investigated. Yet, a growing number of studies have highlighted an impact of plasmids on their host bacteria. Here, we describe the plasmid-chromosome cross-talk from the plasmid point of view. We summarize data about the chromosomal adaptive mutations generated by plasmid carriage; the impact of the loss of a domesticated plasmid or the gain of a new plasmid. Then, we present the control of plasmid-encoded regulators on chromosomal gene expression. The involvement of regulators homologous to chromosome-encoded proteins is illustrated by the H-NS-like proteins, and by the Rap-Phr system. Finally, plasmid-specific regulators of chromosomal gene expression are presented, which highlight the involvement of transcription factors and sRNAs. A comprehensive analysis of the mechanisms that allow a given plasmid to impact the chromosome of bacterium will help to understand the tight cross-talk between plasmids and the chromosome.
Keywords : plasmide chromosome
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https://hal.archives-ouvertes.fr/hal-02389634
Contributor : Florence Hommais <>
Submitted on : Monday, December 2, 2019 - 3:52:38 PM
Last modification on : Friday, December 11, 2020 - 12:34:03 PM

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Ludovic Vial, Florence Hommais. Plasmid‐chromosome crosstalks. Environmental Microbiology, Wiley-Blackwell, 2019, ⟨10.1111/1462-2920.14880⟩. ⟨hal-02389634⟩

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