Related Experiment Video
Updated: Aug 14, 2026
05:23
Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization
Published on: December 23, 2020
Programmed ribosomal frameshifting in HIV-1 and the SARS-CoV
Ian Brierley1, Francisco J Dos Ramos
1Division of Virology, Department of Pathology, University of Cambridge, Tennis Court Road, Cambridge CB2 1QP, UK. ib103@mole.bio.cam.ac.uk
Virus Research
|November 29, 2005
Summary
Ribosomal frameshifting is a key gene expression mechanism for viruses like HIV-1 and SARS-CoV to produce essential enzymes. Understanding these viral frameshift signals may lead to new antiviral therapies.
Area of Science:
- Molecular Biology
- Virology
- Genetics
Background:
- Ribosomal frameshifting is a vital process enabling RNA viruses to synthesize necessary enzymes.
- This mechanism is crucial for the replication of significant human pathogens.
Purpose of the Study:
- To examine ribosomal frameshifting in human immunodeficiency virus type 1 (HIV-1) and SARS-associated coronavirus (SARS-CoV).
- To describe the frameshift signals in HIV-1 and SARS-CoV.
- To explore the implications for frameshifting models and potential antiviral strategies.
Main Methods:
- Analysis of viral genomic sequences to identify frameshift signals.
- Review of existing literature on viral replication mechanisms.
- Comparative analysis of frameshifting in HIV-1 and SARS-CoV.
Main Results:
- Detailed characterization of frameshift signals in HIV-1 and SARS-CoV.
- Insights into how these signals influence viral replication.
- Identification of potential targets for antiviral drug development.
Conclusions:
- Frameshifting is a conserved mechanism critical for the life cycle of HIV-1 and SARS-CoV.
- Knowledge of frameshift signals can inform the development of novel antiviral therapies.
- Further research into viral frameshifting holds promise for combating infectious diseases.
More Related Videos
Related Concept Videos
02:28Leaky Scanning
During most eukaryotic translation processes, the small 40S ribosome subunit scans an mRNA from its 5' end until it encounters the first start AUG codon. The large 60S ribosomal subunit then joins the smaller one to initiate protein synthesis. The location of the translation initiation is largely determined by the nucleotides near the start codon as there may be multiple translation initiation sites present on the mRNA. Marilyn Kozak discovered that the sequence RCCAUGG (where R stands for...
01:29Coronavirus
Coronaviruses, including the severe acute respiratory syndrome coronavirus (SARS-CoV), are enveloped viruses characterized by their single-stranded, positive-sense RNA genome and helical nucleocapsid structure. The hallmark of these viruses is their club-shaped spike (S) glycoproteins that protrude from the viral envelope, facilitating attachment to host cells. Typically, coronaviruses infect the upper respiratory tract, often causing mild or asymptomatic disease. However, certain strains like...
00:36Viral Mutations
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
02:33Retroviruses
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’...
01:29Viruses with RNA Genomes
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
02:53Ribosomal RNA Synthesis
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,...
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,...