Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Viral Mutations00:36

Viral Mutations

34.7K
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...
34.7K
Gene Evolution - Fast or Slow?02:05

Gene Evolution - Fast or Slow?

7.6K
The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
In contrast, regions which code...
7.6K
Mutations in Microorganisms01:18

Mutations in Microorganisms

180
Mutations are heritable changes in an organism’s genome involving alterations in the base sequence of DNA or RNA. These changes can influence cellular processes and phenotypic traits, potentially transforming the unaltered wild type into a mutant form. Such changes, termed forward mutations, are pivotal in shaping the genetic diversity of organisms.RNA viruses exhibit the highest mutation rates due to the absence of robust proofreading mechanisms during genome replication. In contrast,...
180
Leaky Scanning02:28

Leaky Scanning

5.3K
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...
5.3K
RNA Editing02:23

RNA Editing

9.3K
RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
9.3K
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

11.0K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
11.0K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Instantaneous Self-Healing Chitosan Hydrogels with Enhanced Drug Leakage Resistance for Infected Stretchable Wounds Healing.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same author

Investigation of the connection between triglyceride-glucose (TyG) index and the risk of acute kidney injury in septic patients - a retrospective analysis utilizing the MIMIC-IV database.

Renal failure·2025
Same author

Host-dependent C-to-U RNA editing in SARS-CoV-2 creates novel viral genes with optimized expressibility.

Frontiers in cellular and infection microbiology·2024
Same author

SARS-CoV-2 continuously optimizes its codon usage to adapt to human lung environment.

Journal of applied genetics·2023
Same author

C-to-U RNA deamination is the driving force accelerating SARS-CoV-2 evolution.

Life science alliance·2022
Same author

Nothing in SARS-CoV-2 makes sense except in the light of RNA modification?

Future virology·2022

Related Experiment Video

Updated: Oct 14, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

1.1K

Fast evolution of SARS-CoV-2 driven by deamination systems in hosts.

Yanping Zhang1,2, Wen Jiang1,2, Yan Li3

  • 1Department of Respiratory Diseases, Qingdao Haici Hospital, Shandong, China.

Future Virology
|November 1, 2021
PubMed
Summary

The rapid evolution of SARS-CoV-2, an RNA virus, is primarily caused by extensive RNA deamination processes within host cells. This viral RNA modification significantly impacts viral adaptation and spread.

Keywords:
RNA deaminationRNA structureSARS-CoV-2evolutionnatural selection

More Related Videos

Production of a SARS-CoV-2 Virus-Like-Particle System to Investigate Viral Life Cycles In Vitro
09:26

Production of a SARS-CoV-2 Virus-Like-Particle System to Investigate Viral Life Cycles In Vitro

Published on: June 6, 2025

723
Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

4.6K

Related Experiment Videos

Last Updated: Oct 14, 2025

Following the Dynamics of Structural Variants in Experimentally Evolved Populations
04:52

Following the Dynamics of Structural Variants in Experimentally Evolved Populations

Published on: February 3, 2023

1.1K
Production of a SARS-CoV-2 Virus-Like-Particle System to Investigate Viral Life Cycles In Vitro
09:26

Production of a SARS-CoV-2 Virus-Like-Particle System to Investigate Viral Life Cycles In Vitro

Published on: June 6, 2025

723
Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells
10:34

Probing RNA Structure with Dimethyl Sulfate Mutational Profiling with Sequencing In Vitro and in Cells

Published on: December 9, 2022

4.6K

Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • SARS-CoV-2 is a rapidly evolving RNA virus.
  • Host cell mechanisms play a crucial role in viral evolution.
  • RNA deamination is a key cellular process affecting viral RNA.

Discussion:

  • Extensive RNA deamination by host cells significantly drives the rapid evolution of SARS-CoV-2.
  • This process introduces mutations into the viral genome, influencing its adaptability.
  • Understanding deamination's role is critical for comprehending viral mutation patterns.

Key Insights:

  • Host-mediated RNA deamination is a major factor in SARS-CoV-2 evolution.
  • The extent of deamination directly correlates with the virus's evolutionary rate.
  • This finding highlights a critical host-pathogen interaction in viral adaptation.

Outlook:

  • Further research into specific deaminating enzymes and their targets in SARS-CoV-2 RNA.
  • Exploring therapeutic strategies that modulate host deamination activity to control viral evolution.
  • Investigating the broader implications of RNA deamination in the evolution of other RNA viruses.