Viral Genome Integration
Viral Genome Integration - Related Videos
06:57
Dot Blot Assay to Quantify Viral Genome
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2025
In this video, we describe the dot blot assay to quantify a viral genome. The signal intensity is directly related to the amount of viral DNA in the sample.
09:31
Amplification, Next-generation Sequencing, and Genomic DNA Mapping of Retroviral Integration Sites
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Cited by 56 •
2016
We describe a protocol for amplifying retroviral integration sites from the genomic DNA of infected cells, sequencing the amplified virus-host junctions, and then mapping these sequences to a reference genome. We also describe techniques to quantify the distribution of integration sites relative to various genomic annotations using BEDTools.
01:26
Size and Structure of Viral Genomes
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2025
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
08:31
Isolation and Genome Analysis of Single Virions using 'Single Virus Genomics'
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Cited by 2 •
2013
Single Virus Genomics (SVG) is a method to isolate and amplify the genomes of single virons. Viral suspensions of a mixed assemblage are sorted using flow cytometry onto a microscope slide with discrete wells containing agarose, thereby capturing the virion and reducing genome shearing during downstream processing. Whole genome amplification is achieved using multiple displacement amplification (MDA) resulting in genomic material that is suitable for sequencing.
03:20
Nested-PCR to Detect a Specific Viral Genomic Sequence
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2025
This video describes nested polymerase chain reaction, a technique that consists of two sequential PCR amplification processes using two primer sets. The first set of primers is intended to anneal to sequences upstream of the second set, resulting in selective amplification of specific gene sequences. This PCR is more sensitive and specific than a normal PCR and is widely used as a detection technique for various diseases.
FAQs
In retroviruses, integrase acts after viral RNA has been converted into DNA by reverse transcription. The enzyme joins the resulting viral DNA to host chromosomal DNA, producing a provirus rather than leaving the viral sequence as a separate genetic element. This joining step is central to establishing a persistent viral genetic state that can be copied as the host cell divides.
Integration can support long-term infection because the provirus is copied along with host chromosomes when an infected cell divides. Viral genetic material can therefore remain in descendant cells over time. This persistence helps explain the connection between integration and viral latency, in which the viral genome remains present as part of the host cell’s genetic material.
The insertion site matters because viral DNA can affect nearby host gene activity. These insertional effects may change how cellular genes are regulated, making integration more than a simple storage event. Mapping where viral sequences enter chromosomes helps researchers relate the physical integration site to possible changes in cell behavior and evaluate the biological consequences of insertion.
Mapping integration sites identifies where viral genetic material has entered host chromosomes and allows those locations to be considered in relation to host genes. This information helps researchers investigate insertional effects, understand how integration may influence cellular gene activity, and assess biosafety concerns associated with persistent viral sequences or engineered integrating systems.
Engineered integrating vectors use the capacity for chromosomal insertion to support gene delivery in research and therapeutic development. Once delivered genetic material integrates, it can persist as host cells divide, which is useful when long-term retention is important. Their design must also account for possible effects on host gene activity and the safety implications of integration.
Integration connects viral persistence with changes that may occur in host cells over time. In biology, it helps researchers study long-term infection, latency, and the relationship between insertion sites and cellular gene activity. In biosafety research, integration-site information supports evaluation of engineered viral systems and guides efforts to design safer vectors for gene delivery.