A phage satellite manipulates the viral DNA packaging motor to inhibit phage and promote satellite spread

Related Experiment Video

Updated: Jun 27, 2025

Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi
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Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi

Published on: September 28, 2022

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Caroline M Boyd1, Kimberley D Seed1

  • 1Plant and Microbial Biology, University of California - Berkeley, Berkeley, CA, 94720, USA.

Biorxiv : the Preprint Server for Biology
|May 7, 2024
PubMed

Insights

Phage satellites (PLEs) inhibit Vibrio cholerae phage ICP1 packaging by blocking its motor (TerL) with Gpi. PLEs use specific factors (GpsA, GpsB) and mimicry to package their own DNA, representing a novel phage-ICP1 interaction.

Area of Science:

  • Microbiology
  • Virology
  • Molecular Biology

Background:

  • Bacteriophages like ICP1 are crucial in controlling bacterial populations, including pathogens like Vibrio cholerae.
  • Phage satellites (PLEs) are genetic elements that depend on helper phages, like ICP1, for replication and spread.
  • PLEs interfere with ICP1's lifecycle, but the mechanisms inhibiting ICP1's genome packaging were previously unknown.

Conclusions:

  • PLEs possess sophisticated mechanisms to inhibit ICP1's lifecycle, including blocking its DNA packaging machinery.
  • Gpi is the first identified satellite-encoded inhibitor targeting a phage TerL, highlighting novel host-parasite dynamics.
  • The multifaceted strategy of PLEs ensures their propagation at the expense of the helper phage ICP1, making them highly effective inhibitors.

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