Related Experiment Video
Updated: Nov 25, 2025

14:40
Exploring m6A and m5C Epitranscriptomes upon Viral Infection: an Example with HIV
Published on: March 5, 2022
3.6K
Epitranscriptomic(N6-methyladenosine) Modification of Viral RNA and Virus-Host Interactions
Hasan Imam1, Geon-Woo Kim1, Aleem Siddiqui1
1Division of Infectious Diseases, Department of Medicine, University of California, San Diego, La Jolla, CA, United States.
Frontiers in Cellular and Infection Microbiology
|December 17, 2020
Summary
N6-methyladenosine (m6A) modification impacts viral RNA metabolism and pathogenesis. Understanding m6A regulation offers new strategies against virus-associated diseases.
Area of Science:
- Molecular Biology
- Virology
- Epigenetics
Background:
- N6-methyladenosine (m6A) is the most common internal modification in eukaryotic mRNA.
- m6A sites are increasingly found in viral RNA genomes and transcripts.
- m6A influences RNA stability, splicing, nuclear export, translation, and degradation.
Purpose of the Study:
- To review the role of m6A modification in viral replication, morphogenesis, and life cycle.
- To explore m6A's contribution to disease progression in viral infections.
- To highlight the need for understanding m6A in viral pathogenesis for therapeutic development.
Main Methods:
- Literature review of m6A's role in viral RNA metabolism.
- Analysis of m6A regulation by writers, erasers, and readers in viral contexts.
- Synthesis of current knowledge on m6A's impact on viral pathogenesis.
Main Results:
- m6A modification is implicated in multiple stages of viral RNA metabolism.
- m6A plays a significant role in viral replication and disease progression.
- The dynamic m6A process is regulated by methyltransferases, demethylases, and binding proteins.
Conclusions:
- m6A modification is a critical regulator of viral life cycles and pathogenesis.
- Further investigation into m6A in viral infections is essential.
- Targeting m6A pathways may offer novel therapeutic strategies for viral diseases.
Related Concept Videos
RNA Editing
9.5K
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...
9.5K
Viruses with RNA Genomes
441
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...
441
Leaky Scanning
5.4K
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...
5.4K
RNA Stability
35.0K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
35.0K
siRNA - Small Interfering RNAs
17.7K
Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the...
17.7K
Size and Structure of Viral Genomes
441
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
441

