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Towards a Universal Translator: Decoding the PTMs That Regulate Orthoflavivirus Infection
Hannah M Schmidt1, Stacy M Horner1,2,3
1Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, NC 27710, USA.
Viruses
|February 26, 2025
Summary
Post-translational modifications (PTMs) are crucial for orthoflavivirus infection, impacting viral entry, replication, and assembly in both hosts. Understanding these protein modifications offers potential new therapeutic strategies against diseases like dengue and Zika.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- Post-translational modifications (PTMs) are vital for protein function in biological systems.
- Orthoflaviviruses, including dengue, Zika, and West Nile viruses, utilize PTMs to regulate their lifecycle and pathogenesis.
- PTMs on viral proteins are key mediators of host-pathogen interactions during infection.
Purpose of the Study:
- To review the mechanisms by which PTMs regulate orthoflavivirus infection in vertebrate and arthropod hosts.
- To examine the role of specific PTMs (ubiquitination, glycosylation, phosphorylation, SUMOylation, acetylation) in viral entry, RNA replication, assembly, and egress.
- To explore how PTMs influence host tropism, pathogenesis, and host antiviral responses.
Main Methods:
- Literature review of existing research on PTMs in orthoflavivirus infections.
- Analysis of PTMs on viral structural and non-structural proteins.
- Examination of PTM functions in both arthropod vectors and vertebrate hosts.
Main Results:
- Ubiquitination and glycosylation of envelope proteins facilitate viral entry.
- Phosphorylation, SUMOylation, and acetylation of non-structural proteins modulate viral RNA replication.
- PTMs on structural proteins regulate viral assembly and egress; PTMs can have divergent functions in different hosts and influence pathogenesis.
Conclusions:
- PTMs are critical regulators of the orthoflavivirus lifecycle, host tropism, and pathogenesis.
- Host antiviral responses can trigger PTMs on viral proteins to restrict infection.
- Further research into PTM dynamics and conservation may unveil novel therapeutic targets for flaviviral diseases.
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