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Understanding the Impact of Temperate Bacteriophages on Their Lysogens Through Transcriptomics

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Summary

This summary is machine-generated.

Bacterial phages use quorum sensing to control their life cycles. Prophages manipulate host quorum sensing, influencing bacterial competition and survival by sensing the ratio of infected to uninfected hosts.

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Area of Science:

Microbiology
Molecular Biology
Bacteriology

Background:

Phaeobacter inhibens T5 harbors three LuxI/LuxR quorum-sensing systems.
Two of these systems are encoded by prophages within the host genome.

Purpose of the Study:

To investigate the role of prophage quorum-sensing systems in bacterial-phage interactions.
To understand how prophages manipulate host quorum sensing and lysogeny decisions.

Main Methods:

Analysis of quorum-sensing system interactions between host and prophages.
Investigating the molecular mechanisms of autoinducer action on prophage promoters.

Main Results:

Each prophage autoinducer activates its own and co-resident prophage lysogeny programs.
Prophages use ratiometric sensing of host and prophage autoinducers to decide between lysis and lysogeny.
A bidirectional interaction exists where prophage activates host quorum sensing, and host represses prophage quorum sensing.

Conclusions:

Prophages employ sophisticated quorum-sensing strategies to control host behavior and outcompete rivals.
Ratiometric sensing allows prophages to make lysis decisions based on the relative abundance of susceptible hosts.
Phage quorum-sensing modules are prevalent and dynamic, highlighting their ecological significance.