Genomic Evolution Strategy in SARS-CoV-2 Lineage B: Coevolution of Cis Elements

Area of Science:

• Virology
• Molecular Biology
• Bioinformatics

Background:

• RNA elements are vital for coronavirus replication and gene expression.
• The precise structures and functions of these RNA elements in coronaviruses are not fully understood.
• Further research is needed to understand these elements for future outbreak preparedness.

Purpose of the Study:

• To analyze the in silico presence and adaptation of cis RNA structures across alpha-, beta-, gamma-, and deltacoronavirus genera.
• To investigate the variability and functional adaptation of specific cis RNA elements (stem-loop, pseudoknot, s2m) in different coronavirus variants.
• To explore the conformational flexibility and potential coevolution of the s2m element in SARS variants.

Main Methods:

• In silico analysis of cis RNA structures.
• Comparative genomics across different coronavirus genera.
• Secondary structure prediction and analysis.

Main Results:

• Detailed view of cis RNA structure presence and adaptation across coronavirus genera.
• Demonstrated functional adaptation of specific cis elements (stem-loop, pseudoknot, s2m) in certain variants.
• Identified conformational flexibility and potential coevolution of the s2m element in SARS variants.

Conclusions:

• Coronaviruses exhibit significant variability in cis RNA secondary structures, suggesting genomic adaptations.
• These structural variations are linked to replication, genetic regulation, and variant-specific pathogenicity.
• Understanding RNA structure evolution is crucial for viral adaptation, pathogenicity, and developing therapeutic strategies.