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Role and regulation of the stress activated sigma factor sigma B (σB) in the saprophytic and host-associated life stages of Listeria monocytogenes

Abstract : The stress activated sigma factor sigma B (σB) plays a pivotal role in allowing the food-borne bacterial pathogen Listeria monocytogenes to modulate its transcriptional landscape in order to survive in a variety of harsh environments both outside and within the host. While we have a comparatively good understanding of the systems under the control of this sigma factor much less is known about how the activity of σB is controlled. In this review, we present a current model describing how this sigma factor is thought to be controlled including an overview of what is known about stress sensing and the early signal transduction events that trigger its activation. We discuss the known regulatory overlaps between σB and other protein and RNA regulators in the cell. Finally, we describe the role of σB in surviving both saprophytic and host-associated stresses. The complexity of the regulation of this sigma factor reflects the significant role that it plays in the persistence of this important pathogen in the natural environment, the food chain as well as within the host during the early stages of an infection. Understanding its regulation will be a critical step in helping to develop rational strategies to prevent its growth and survival in the food destined for human consumption and in the prevention of listeriosis.
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https://hal.inrae.fr/hal-02913687
Contributor : Roselyne Tâche <>
Submitted on : Monday, August 10, 2020 - 11:24:25 AM
Last modification on : Tuesday, October 27, 2020 - 3:00:24 AM

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Amber Dorey, Catarina Marinho, Pascal Piveteau, Conor O'Byrne. Role and regulation of the stress activated sigma factor sigma B (σB) in the saprophytic and host-associated life stages of Listeria monocytogenes. Advances in Applied Microbiology, 106, pp.1-48, 2019, ⟨10.1016/bs.aambs.2018.11.001⟩. ⟨hal-02913687⟩

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