Retrovirus Genome
Retrovirus Genome - Related Videos
02:33
Retroviruses
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2020
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
01:10
Retrovirus Life Cycles
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2019
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
01:51
Mechanisms of Retrovirus-induced Cancers
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2021
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
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.
02:02
Genomics
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2020
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
FAQs
Reverse transcriptase creates a DNA version of the viral RNA, and that product becomes double stranded before entering the host-cell nucleus. Integration then places the viral sequence within a host chromosome, converting an infection-associated RNA template into a chromosomally integrated provirus. This transition is central to studying retroviral replication.
Integration matters because the provirus can be read by host enzymes after it becomes part of a chromosome. Those enzymes generate both messenger RNA, which supports production of viral proteins, and genomic RNA, which contributes to new viral particles. Researchers therefore examine integration as a connection between chromosomal viral DNA and viral output.
Retrovirus particles typically package two identical strands of positive-sense single-stranded RNA. This paired arrangement is a notable feature of retroviral genome architecture and must be considered when investigators characterize the genetic material inside a viral particle. It provides important structural context for studies of infection, reverse transcription, and genome integration.
A basic genome-focused analysis follows the infection sequence: identify the packaged RNA, track its conversion by reverse transcriptase into double-stranded DNA, examine nuclear entry and chromosomal integration, then assess host transcription. This workflow links each molecular stage to outcomes including provirus formation, messenger RNA production, genomic RNA production, and new viral particles.
In HIV-related research, the retrovirus genome provides a framework for examining how viral replication and chromosomal integration occur in a host. It also supports analysis of host–pathogen interactions, meaning the molecular relationship between the infecting virus and its host. These genome-level questions connect basic mechanisms with disease-focused investigation.
Retroviral vectors are a practical application of genome research because knowledge of retroviral genetic material and its behavior in host cells supports gene-delivery studies. Investigators can connect findings about reverse transcription, integration, and host transcription with the development of delivery systems, keeping the genome’s role central to this research application.