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Bacteriophages, or phages, are viruses that specifically infect bacteria, utilizing their genetic material to hijack host cellular machinery for replication. DNA bacteriophages employ single-stranded DNA (ssDNA) or double-stranded DNA (dsDNA) genomes. These phages exhibit diverse replication strategies and host interactions, influencing their ecological roles and applications in biotechnology and medicine.ssDNA BacteriophagesssDNA phages, with their small genomes, utilize unique strategies to...
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Among the three main modes of HGT—transformation, conjugation, and transduction—transduction is unique in that it is mediated by bacteriophages, or bacterial viruses.Transduction occurs in two ways. Generalized transduction occurs during the lytic cycle of a bacteriophage infection. In this process, bacteriophages infect bacterial cells, replicate within them, and ultimately cause cell lysis, releasing newly assembled virions. Occasionally, random fragments of the bacterial genome...
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The lysogenic cycle is a crucial viral replication strategy that allows bacteriophages to persist within host cells without immediately destroying them. This process is primarily observed in temperate phages, such as bacteriophage lambda (λ), which infects Escherichia coli. The cycle allows the viral genome to persist across bacterial generations while keeping host cells viable.Integration of the Viral GenomeUpon infection, bacteriophage lambda attaches to the bacterial surface and injects...
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Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
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Programming Bacteriophages by Swapping Their Specificity Determinants.

Moran G Goren1, Ido Yosef1, Udi Qimron1

  • 1Department of Clinical Microbiology and Immunology, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.

Trends in Microbiology
|November 4, 2015
PubMed
Summary
This summary is machine-generated.

Bacteriophages, viruses that infect bacteria, can be engineered to target specific bacterial strains. This research introduces a method to alter bacteriophage host specificity by modifying their recognition ligand, enhancing their potential as precision antibacterial agents.

Keywords:
bacteriophage adsorptionhost-range expansionhost-recognition ligandshaping bacterial microbiome

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biotechnology

Background:

  • Bacteriophages (phages) are natural predators of bacteria with potential as antibacterial agents.
  • Phage specificity offers selective bacterial targeting but limits broad-spectrum application.
  • Modifying phage host-recognition is key to expanding their therapeutic utility.

Purpose of the Study:

  • To develop a platform for altering bacteriophage host specificity.
  • To enable precise targeting of specific bacterial pathogens using engineered phages.

Main Methods:

  • Engineered bacteriophages by swapping specificity domains within their host-recognition ligand.
  • Assessed the altered host-recognition capabilities of the modified bacteriophages.

Main Results:

  • Demonstrated successful alteration of bacteriophage host specificity through domain swapping.
  • Validated the platform's ability to redirect phage targeting to different bacterial strains.

Conclusions:

  • The developed platform allows for the engineering of bacteriophages with tailored host specificities.
  • This approach enhances the potential of bacteriophages as targeted antibacterial therapies.