First full-genome alignment representative for the genus Pestivirus

Area of Science:

• Virology
• Molecular Biology
• Bioinformatics

Background:

• Pestiviruses are significant livestock pathogens within the Flaviviridae family.
• The pestivirus RNA genome contains essential secondary structures for its life cycle.
• Previous research focused on limited pestivirus species and their RNA structures.

Purpose of the Study:

• To perform a genome-wide multiple sequence alignment of all known pestivirus species.
• To comprehensively analyze phylogenetically conserved RNA secondary structures across the genus.
• To identify novel conserved RNA structures and their potential functions.

Main Methods:

• Genome-wide multiple sequence alignment (MSA) of 19 pestivirus species.
• Phylogenetic analysis of conserved RNA secondary structures.
• Identification and characterization of novel RNA structures and interactions.

Main Results:

• Established a comprehensive MSA for all known pestivirus species.
• Confirmed conservation of known structures (5' SL, IRES, 3' SLI) across all species.
• Discovered 29 novel conserved RNA secondary structures in the protein-coding region.
• Identified a conserved microRNA-17 binding site in additional species.
• Found a putative long-distance RNA interaction between the IRES and the 3' genome end.

Conclusions:

• The study provides a valuable resource for pestivirus research and diagnostics.
• Conserved RNA structures play a critical role in pestivirus evolution and function.
• Novel RNA structures identified may represent new targets for antiviral strategies.