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Updated: Sep 20, 2025

Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins
09:40

Phage Phenomics: Physiological Approaches to Characterize Novel Viral Proteins

Published on: June 11, 2015

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A conserved phage phosphoesterase enables evasion of bacterial antiviral immunity

Junlong Li1, Yihao Song1, Xiao Guo1

  • 1College of Life Science and Technology, Guangxi University, Nanning, 530004, China.

EMBO Reports
|May 29, 2025
PubMed

Insights

Mycobacteriophage A10ZJ24

Area of Science:

  • Microbiology
  • Virology
  • Genetics

Background:

  • Antimicrobial resistance is a growing global health crisis.
  • Mycobacteriophages are viruses that infect bacteria and show potential for treating drug-resistant infections.
  • The mechanisms by which these phages overcome bacterial defenses are not fully understood.

Purpose of the Study:

  • To investigate the molecular mechanism of mycobacteriophage A10ZJ24 in combating Mycobacterium tuberculosis.
  • To identify specific phage genes essential for overcoming bacterial resistance.
  • To elucidate how phages subvert host antiviral immunity.

Main Methods:

  • Genetic analysis of mycobacteriophage A10ZJ24.
  • Gene deletion experiments to assess the role of specific genes (e.g., gp48).
  • Assessment of phage DNA integrity and bacterial anti-phage gene expression post-infection.

Main Results:

  • The gene gp48, encoding a metallophosphoesterase-like protein, is crucial for killing Mycobacterium tuberculosis.
  • Gp48 disrupts the integrity of mycobacterial genomic DNA early in infection.
  • This disruption silences bacterial anti-phage defense genes, allowing phage replication.

Conclusions:

  • Phage gp48 is a novel tool for overcoming bacterial antiviral immunity.
  • This metallophosphoesterase activity is key to the phage's ability to kill M. tuberculosis.
  • The findings advance understanding of the phage-host interaction in the context of antimicrobial resistance.
Keywords:
Mycobacterium tuberculosisAntiphage DefenseMetallophosphoesterasePhage

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