Provirus Genome Integration
Provirus Genome Integration - Related Videos
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.
06:33
A Rapid Protocol for Integrating Extrachromosomal Arrays With High Transmission Rate into the C. elegans Genome
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Cited by 59 •
2013
This protocol describes a rapid and low material consuming procedure for the integration of transgenic extrachromosomal arrays into the Caenorhabditis elegans genome using ultra violet (UV) irradiation. Furthermore, this protocol is particularly well suited for transgenic lines that transmit extrachromosomal arrays at a high rate.
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.
10:41
An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
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Cited by 34 •
2018
Here, we describe an optimized high-throughput ChIP-sequencing protocol and computational analyses pipeline for the determination of genome-wide chromatin state patterns from frozen tumor tissues and cell lines.
10:18
Amplification of Near Full-length HIV-1 Proviruses for Next-Generation Sequencing
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Cited by 21 •
2018
Full-length individual proviral sequencing (FLIPS) provides an efficient and high-throughput method for the amplification and sequencing of single, near full-length (intact and defective) HIV-1 proviruses and allows for determination of their potential replication-competency. FLIPS overcomes limitations of previous assays designed to sequence the latent HIV-1 reservoir.
FAQs
Retroviral integrase processes the ends of viral DNA before joining them to host DNA. This end processing creates DNA structures suitable for insertion into the chromosome. Cellular repair pathways then seal the integration junctions, converting the initial joining event into a stable genetic connection. The coordinated action of viral and host factors determines whether integration becomes persistent.
Integration is not complete when viral DNA first joins host DNA. Cellular repair pathways seal the integration junctions, stabilizing the inserted viral sequence within the chromosome. This repair step helps establish a durable provirus rather than leaving an unresolved DNA structure. As a result, the inserted material can remain associated with the host genome through subsequent cellular activity.
The genomic neighborhood surrounding an integration site can affect how viral genes behave. Nearby regulatory regions may alter host gene expression and can also influence the activity of inserted viral sequences. Consequently, two integration events may have different biological effects depending on their chromosomal context. This positional influence is important when interpreting provirus behavior and its effects on host biology.
Once viral DNA has been integrated and the junctions have been sealed, the provirus becomes part of the host chromosome. Host genome replication can then copy the integrated viral genes along with cellular DNA. This inheritance mechanism helps explain how viral genetic material persists in dividing cells and why integration is central to long-term infection rather than only short-term viral activity.
Integrated viral sequences provide a framework for examining how viral genetic material can remain in host genomes over time. Their persistence connects provirus genome integration with viral evolution and with endogenous retroelements, which are genetic elements present within host chromosomes. Studying these relationships helps place persistent viral sequences in the broader history of genome change and host-virus interactions.
Provirus genome integration is relevant to gene-delivery systems because inserted genetic material can persist when the host chromosome replicates. That persistence may support long-term expression, but nearby regulatory regions can also influence host gene expression. For this reason, understanding integration mechanisms and genomic context contributes to the design and safety assessment of systems intended to deliver genes into cells.