Related Experiment Video
Updated: Aug 15, 2025
09:01
Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi
Published on: September 28, 2022
2.1K
Host control by SPβ phage regulatory switch as potential manipulation strategy.
Valentina A Floccari1, Anna Dragoš1
1Department of Microbiology, Biotechnical Faculty, University of Ljubljana, Večna pot 111, 1000 Ljubljana, Slovenia.
Current Opinion in Microbiology
|December 29, 2022
Summary
Temperate phages may manipulate bacterial hosts using novel mechanisms like active lysogeny and a quorum sensing system called Arbitrium. This suggests a parasitic manipulation ecological relationship, challenging traditional host-parasite dynamics.
Area of Science:
- Microbiology
- Molecular Biology
- Ecology
Background:
- The interaction between temperate phages and bacteria is complex, often viewed as parasitic with potential mutualistic benefits.
- Recent findings suggest phages may employ manipulative strategies beyond simple parasitism.
Purpose of the Study:
- To investigate novel mechanisms of phage-bacteria interactions.
- To propose parasite manipulation as an ecological relationship in specific phage-host systems.
Main Methods:
- Analysis of active lysogeny mechanisms in SPβ-like phages.
- Characterization of the phage-encoded quorum sensing system 'Arbitrium'.
Main Results:
- Identified novel mechanisms of active lysogeny.
- Detailed the function of the Arbitrium quorum sensing system in phage regulation.
- Provided evidence for phage-mediated manipulation of bacterial hosts.
Conclusions:
- Certain temperate phages, like SPβ-like phages, utilize sophisticated strategies to manipulate their bacterial hosts.
- The findings support a parasite manipulation model for specific phage-bacteria ecological relationships.
More Related Videos
Related Concept Videos
02:53CRISPR and crRNAs
17.2K
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.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
17.2K
01:26DNA Bacteriophages
85
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...
85
01:30Other Stress Responses in Bacteria
45
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
45
02:53Conservative Site-specific Recombination and Phase Variation
6.1K
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
6.1K
01:17Gene Regulation During Sporulation
60
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
60
01:16Viral Replication: Lysogenic Cycle
116
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...
116