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The RNA Secondary Structure Analysis Reveals Potential for Emergence of Pathogenic Flaviviruses
Bibhudutta Mishra1,2, Raviprasad Aduri3
1Department of Biological Sciences, Birla Institute of Technology and Science Pilani, K K Birla Goa campus, Zuarinagar, South Goa, 403726, India.
Food and Environmental Virology
|October 25, 2021
Summary
Flaviviruses with a Y-shaped RNA secondary structure in their 5' untranslated region (UTR) may have pathogenic potential. This finding could help identify emerging flavivirus threats, regardless of transmission method.
Area of Science:
- Virology
- Molecular Biology
- RNA Structure
Background:
- The Flavivirus genus encompasses significant human pathogens, causing millions of infections globally.
- The 5' untranslated region (UTR) of the flavivirus RNA genome is crucial for viral replication and pathogenesis.
- Understanding the structural basis of flavivirus pathogenesis is essential for disease control.
Purpose of the Study:
- To investigate the correlation between the RNA secondary structure topology of the 5' UTR and flavivirus pathogenesis.
- To analyze the structural diversity across different groups of flaviviruses, including mosquito-borne, tick-borne, and insect-specific types.
Main Methods:
- Global-scale computational analysis of RNA secondary structures for various flaviviruses.
- Focus on the topology of Stem loop A within the 5' UTR.
- Comparison of structural features between pathogenic and non-pathogenic flavivirus groups.
Main Results:
- A conserved Y-shaped topology in Stem loop A of the 5' UTR was predominantly observed in pathogenic flaviviruses.
- This Y-shaped structure was also found in some currently non-pathogenic flaviviruses.
- The findings suggest a potential link between this specific RNA structure and pathogenicity.
Conclusions:
- The Y-shaped topology in the 5' UTR's Stem loop A may indicate pathogenic potential in flaviviruses.
- This structural feature could serve as a predictive marker for identifying viruses with the capacity to cause disease.
- Further research is warranted to validate the role of this structure in flavivirus pathogenesis and transmission.
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