Phage Replication
Phage Replication - Related Videos
04:30
Phage Purification from Borrelia burgdorferi
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2026
Source: Eggers, C. H. Phage-Mediated Genetic Manipulation of the Lyme Disease Spirochete Borrelia burgdorferi. J. Vis. Exp. (2022).This video demonstrates the isolation of borrelial phage particles from a Borrelia burgdorferi suspension using polyethylene glycol-mediated phase separation. The sample is centrifuged, treated with a salt solution, and a molecular crowding agent to precipitate phages. Chloroform extraction is done to remove debris and concentrate phage particles. The purified phage...
03:04
Atomic Force Microscopy to Visualize Phage–Antigen Interactions
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2026
Source: Williams, S. M. et al. Novel Atomic Force Microscopy Based Biopanning for Isolation of Morphology Specific Reagents against TDP-43 Variants in Amyotrophic Lateral Sclerosis. J. Vis. Exp. (2015)This video demonstrates tapping-mode AFM to visualize phage–antigen interactions on a mica surface. It outlines the steps for antigen immobilization, phage binding, and high-resolution nanoscale imaging.
02:46
A Phage Therapy against Pseudomonas aeruginosa Infection in Zebrafish Embryos
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2025
The video demonstrates the phage therapy technique targeting Pseudomonas aeruginosa infection in cystic fibrosis zebrafish embryos. Phage therapy effectively diminishes bacterial load and mitigates proinflammatory immune responses in CF zebrafish embryos infected with bacteria, leading to reduced CF embryo lethality.
12:36
A Protocol for Phage Display and Affinity Selection Using Recombinant Protein Baits
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Cited by 3 •
2014
Phage display is a powerful technique to capture proteins or protein moieties that interact with an immobilized molecule of interest. Once a decision of the type of phage cDNA library to create and screen has been made, the protocol described here permits efficient affinity selection leading to identification of interactors.
03:17
Measuring Spontaneous Phage Induction in Lysogenic Bacteria Over Time
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2026
Source: Krishnamurthi, R., et al. Understanding the Impact of Temperate Bacteriophages on Their Lysogens Through Transcriptomics. J. Vis. Exp. (2024).This video demonstrates the temporal enumeration of spontaneous phage induction in lysogenic Pseudomonas aeruginosa by quantifying viable bacterial cells (CFUs) and infective phage particles (PFUs) over time. By sampling at defined intervals during growth and analyzing both colony and plaque formation, the method reveals when spontaneous induction...
FAQs
Attachment to a matching bacterial receptor determines whether the replication process can begin. This receptor-specific step is followed by injection of the phage genome into the cell, linking recognition with genetic takeover. Because the initial interaction is selective, receptor availability is an important condition for whether a particular phage can establish replication in a bacterial host.
After entry, the phage genome redirects bacterial enzymes and cellular resources toward viral production. These resources support two linked outputs: copying phage nucleic acids and synthesizing structural proteins. This relationship explains how an infected bacterium becomes a production site for phage particles, with the host’s molecular capacity supporting genome replication and construction of new virions.
A lytic outcome culminates in assembly followed by cell lysis, releasing newly formed phage particles. In a lysogenic cycle, some phages instead integrate their genetic material into the bacterial chromosome. This difference changes the immediate outcome: destruction of the host cell in one pathway versus persistence of phage genetic material within the bacterium in the other.
Assembly combines newly copied phage nucleic acids with structural proteins to produce complete viral particles. It therefore connects molecular production inside the bacterium with the formation of transmissible phage units. Treating assembly as a distinct stage helps explain how replication progresses from genome synthesis and protein production to the particles associated with lytic release.
A useful sequence begins with receptor attachment and genome injection, followed by redirection of bacterial enzymes and resources. Researchers can then examine phage nucleic-acid copying, structural-protein synthesis, virion assembly, and the final outcome of cell lysis or chromosome integration. This framework helps organize observations across the major molecular and cellular stages.
Phage replication provides the biological basis for using bacteriophages in phage therapy. The process explains how a phage can use a bacterial cell to produce new particles and, in lytic outcomes, lyse that cell. Understanding these events supports strategies aimed at addressing antibiotic-resistant infections and helps inform the study of phage behavior in therapeutic contexts.
In biology, phage replication supports research in bacterial genetics, microbial ecology, and biotechnology. Its mechanisms reveal how phage genomes redirect bacterial resources, persist through chromosome integration, or lead to host-cell lysis. These outcomes make phages useful for investigating interactions between viruses and bacteria and for engineering phages for research or biotechnological purposes.