Phage Packaging
Phage Packaging - 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...
06:10
Following Cell-fate in E. coli After Infection by Phage Lambda
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Cited by 20 •
2011
This article describes the procedure for preparing a fluorescently-labeled version of bacteriophage lambda, infection of E. coli bacteria, following the infection outcome under the microscope, and analysis of infection results.
05:22
Using Phage Display to Select Proteins with High Affinity to a Target Protein
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2025
In this video, we demonstrate the phage display technique to isolate pre-engineered phages expressing proteins with high affinity to the target protein.
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.
FAQs
The terminase motor uses ATP to coordinate several linked events: recognizing a packaging signal, cutting viral DNA from a concatemer, and driving that DNA through a portal into the capsid. This coupling connects genome selection with physical translocation, helping place a complete viral genome inside a newly formed protein shell rather than leaving viral DNA unassociated with the capsid.
A packaging signal identifies viral DNA that should enter the capsid, while a concatemer provides a continuous DNA substrate from which the genome can be cut. Their roles connect genome processing with selective encapsidation. Studying these elements helps explain how phages organize viral DNA before assembly and how genome structure can influence the production of infectious particles.
Packaging efficiency influences whether newly formed capsids receive viral genomes in a form suitable for infectious particle production. Because genome loading occurs during assembly, changes in this step can affect the number or quality of completed phage particles. The resulting effects extend to host infection and to how efficiently genetic information is transmitted between bacterial cells.
A useful mechanistic workflow follows the process from packaging-signal recognition to DNA cleavage, portal-mediated entry, and filling of the capsid. Researchers can then relate these events to packaging efficiency, genome structure, and formation of infectious particles. Organizing observations in this sequence separates genome processing from capsid loading while preserving their functional connection during assembly.
Packaging provides a central connection between engineered viral DNA and the production of phage particles. In genome engineering, investigators must consider whether modified genetic material can be processed and loaded into capsids. In phage display, successful particle formation likewise depends on assembling phage particles that carry the intended genetic information, making packaging relevant to both design and output.
Phage-based delivery systems depend on placing genetic information inside protein capsids that can form infectious or otherwise useful particles. Packaging is therefore relevant because it links the viral genome with the particle that transports it. Understanding its efficiency and dependence on genome structure can inform studies of viral replication, genetic transmission between bacteria, and the development of phage-derived delivery approaches.