Viral Dna Extraction
Viral Dna Extraction - Related Videos
12:45
Preparation of Viral DNA from Nucleocapsids
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Cited by 40 •
2011
We describe the process of isolating high purity herpesvirus nucleocapsid DNA from infected cells. The final DNA captured from solution is of high concentration and purity, making it ideally suited for high-throughput sequencing, high fidelity PCR reactions, and transfections to produce new viral recombinants.
09:59
Community DNA Extraction from Bacterial Colonies
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Luisa Ikner Traditional methods of analysis for microbial communities within soils have usually involved either cultural assays utilizing dilution and plating methodology on selective and differential media or direct count assays. Direct counts offer information about the total number of bacteria present, but give no information about the number or diversity of populations present...
05:13
Isolation of Proteins from Viral DNA-protein Complexes
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2026
Source: Dembowski, J. A., et al. Purification of Viral DNA for the Identification of Associated Viral and Cellular Proteins. J. Vis. Exp. (2017).This video demonstrates the isolation of protein–viral DNA complexes from cell nuclei using click chemistry and magnetic bead purification. The protocol involves labeling viral genomes with alkyne-modified nucleotides, biotinylation via a click reaction, and binding to streptavidin-coated magnetic beads. Following washing and heat elution, the purified...
02:59
Extraction of Viral RNA from Surface-Bound Virions Using a Silica Spin Column
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2026
Source: Klaus, J. P. et al. Highly Sensitive Assay for Measurement of Arenavirus-cell Attachment. J. Vis. Exp. (2016)This video demonstrates the extraction of viral RNA from surface-bound virions on epithelial cells using silica spin columns. The method includes chemical lysis, RNA stabilization, and membrane-based purification for downstream quantification of virus-cell attachment.
13:46
Separation of Single-stranded DNA, Double-stranded DNA and RNA from an Environmental Viral Community Using Hydroxyapatite Chromatography
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Cited by 5 •
2011
We describe an efficient method to separate single-stranded DNA, double-stranded DNA and RNA molecules from environmental viral communities. Nucleic acids are fractionated using hydroxyapatite chromatography with increasing concentrations of phosphate-containing buffers. This method permits the isolation of all viral nucleic acid types from environmental samples.
FAQs
Chemical lysis is the first critical control point: it disrupts viral particles so their genomes become accessible for purification. The released material then contacts a purification matrix that retains DNA while other sample components remain removable during washing. This sequence links particle disruption with selective recovery, making the nucleic acid suitable for later amplification and characterization.
Purification quality depends on balancing genome release with protection of DNA integrity. Incomplete lysis can reduce recovery, whereas residual proteins, lipids, cellular debris, or enzymatic inhibitors can compromise downstream reactions. Washing addresses these contaminants, and elution transfers the purified DNA into a form that can be analyzed. The outcome is therefore influenced by both recovery and cleanliness.
PCR-based detection depends on more than recovering viral DNA; the template must also be sufficiently free of substances that interfere with amplification. Proteins, lipids, cellular debris, and enzymatic inhibitors can remain associated with a poorly purified sample. Washing and effective separation reduce this risk, improving the reliability of amplification-based detection and viral load measurements.
The purification matrix provides the separation interface in the workflow. DNA binds to it after lysis, while washing helps remove proteins, lipids, cellular debris, and enzymatic inhibitors. Elution then recovers the DNA from the matrix for downstream testing. Its value is not simply storage: it enables the chemical separation needed to obtain a cleaner template for analysis.
Once purified, viral DNA can support viral load measurement, sequencing, and strain identification in addition to PCR-based detection. These outputs allow investigators to characterize viral genetic material rather than only establish its presence. In infection research, the same preparation can therefore contribute to assay evaluation, transmission studies, and comparisons among viral strains.
Purified viral DNA provides molecular input for PCR-based detection, viral load measurement, sequencing, and strain identification. In transmission research, strain identification can help characterize viral material across infection investigations. For diagnostic assay evaluation, clean DNA reduces interference from sample contaminants, allowing performance to be assessed using a preparation suited to the assay's intended analysis.
Within immunology and infection research, extraction supplies a molecular readout from virus-containing samples that can support studies of host-pathogen interactions. Reliable recovery contributes to investigations of infection status, transmission, and diagnostic assay performance. Because contaminants can interfere with amplification, extraction quality directly affects how confidently researchers interpret PCR-based measurements and related downstream findings.