Viral Rna Synthesis
Viral Rna Synthesis - Related Videos
09:35
Using Click Chemistry to Measure the Effect of Viral Infection on Host-Cell RNA Synthesis
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Cited by 15 •
2013
This method describes the use of click chemistry to measure changes in host cell transcription after infection with the Rift Valley fever virus (RVFV) strain MP-12. Results can be visualized qualitatively via fluorescence microscopy or obtained quantitatively through flow cytometry. This method is adaptable for use with other viruses.
02:36
Transfer RNA Synthesis
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2020
One of the unique features of tRNA is the presence of modified bases. In some tRNAs, modified bases account for nearly 20% of the total bases in the molecule. Altogether, these unusual bases protect the tRNA from enzymatic degradation by RNases. Each of these chemical modifications is carried by a specific enzyme, post-transcription. All of these enzymes have unique base and site-specificity. Methylation, the most common chemical modification, is carried by at least nine different enzymes, with...
02:53
Ribosomal RNA Synthesis
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2020
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells. Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
10:16
Detection of Viral RNA by Fluorescence in situ Hybridization (FISH)
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Cited by 35 •
2012
A fluorescence in situ hybridization (FISH) method was developed to visually detect viral genomic RNA using fluorescence microscopy. A probe is made with specificity to the viral RNA that can then be identified using a combination of hybridization and immunofluorescence techniques. This technique offers the advantage of identifying the localization of the viral RNA or DNA at steady-state, providing information on the control of intracellular virus trafficking events.
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.
FAQs
The central distinction is how the viral RNA can be used after infection. Positive-sense, negative-sense, and double-stranded RNA viruses follow different synthesis patterns, which changes when messenger RNA becomes available, how rapidly viral proteins can be produced, and when genomic RNA can support formation of new particles. These differences help explain variation in replication timing among RNA viruses.
The viral RNA-dependent RNA polymerase reads a viral RNA template and builds a complementary RNA strand or transcribes messenger RNA. Its activity therefore connects template recognition with both genome replication and viral protein expression. Because this enzyme performs a central step in producing the RNAs required for infection, it represents an important mechanistic focus for studying how viral replication proceeds.
Modified host-cell membranes can assist viral proteins and the polymerase during RNA synthesis. They provide a cellular context in which template copying and messenger RNA production can occur as part of the infection process. Their involvement also links RNA production with later stages of viral particle formation, helping explain why viral replication depends on interactions between viral components and host-cell structures.
After infection, viral proteins and the RNA-dependent RNA polymerase act on a viral RNA template. The polymerase then copies complementary RNA strands or produces messenger RNAs, depending on the virus. Messenger RNA supports viral protein production, while newly made genomic RNA supports continued replication and the formation of new particles. This sequence connects RNA synthesis with progression of infection.
Researchers can interpret viral RNA products according to their roles in the infection cycle. Messenger RNA indicates a pathway supporting viral protein expression, whereas genomic RNA is associated with continued replication and production of new particles. Comparing these RNA outputs helps clarify which stage of viral activity is being examined and how the virus coordinates information expression with genome production.
Viral RNA synthesis provides a framework for examining how infection progresses and how viral RNA may become relevant to immune recognition. Its mechanisms also identify steps that can be targeted to limit viral replication. Consequently, this area informs antiviral drug development and vaccine design while connecting molecular events inside infected cells with broader infection and immune-response studies.