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RNA Modifications in Pathogenic Viruses: Existence, Mechanism, and Impacts
Yingying Zou1, Zhoule Guo1, Xing-Yi Ge1
1Hunan Provincial Key Laboratory of Medical Virology, College of Biology, Hunan University, Changsha 410012, China.
Microorganisms
|November 27, 2024
Summary
Viral RNAs undergo diverse modifications like m6A, m5C, ac4C, and m1A. These RNA modifications, regulated by host factors, impact viral life cycles and offer potential targets for antiviral therapies.
Area of Science:
- Molecular Biology
- Virology
- Epigenetics
Background:
- RNA modifications are crucial posttranscriptional regulators in cellular RNAs.
- Emerging evidence reveals extensive RNA modifications in viral genomes.
- These modifications are dynamically regulated by host machinery and influence viral processes.
Purpose of the Study:
- To review four key RNA modifications in viruses: N6-methyladenosine (m6A), 5-methylcytosine (m5C), N4-acetylcytosine (ac4C), and N1-methyladenosine (m1A).
- To elucidate the molecular mechanisms governing these viral RNA modifications.
- To illustrate the functional impacts of these modifications on viral replication, pathogenicity, and host immune responses.
Main Methods:
- Literature review of studies on viral RNA modifications.
- Analysis of molecular mechanisms for m6A, m5C, ac4C, and m1A.
- Synthesis of data on functional consequences for viral life cycles.
Main Results:
- Viral RNAs harbor diverse modifications, including m6A, m5C, ac4C, and m1A.
- Host factors play a significant role in the dynamic regulation of these modifications.
- These modifications critically affect viral replication, pathogenicity, and innate immunity.
Conclusions:
- Common features and mechanisms exist in the generation, regulation, and function of RNA modifications across different viruses.
- Viral RNA modifications and associated host machinery represent promising targets for developing novel antiviral therapeutics and vaccines.
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