Codon usage signatures in Sabia and Chapare for host adaptation

Area of Science:

• Virology
• Genomics
• Molecular Biology

Background:

• Sabia and Chapare viruses are arenaviruses causing severe hemorrhagic fever in humans.
• These viruses have a high fatality rate (30%) and lack specific treatments.
• Understanding viral adaptation mechanisms is crucial for developing therapeutic strategies.

Purpose of the Study:

• To analyze codon usage, amino acid patterns, and influencing factors in Sabia and Chapare viruses.
• To investigate the role of these patterns in viral host adaptation.
• To identify potential targets for antiviral drug discovery.

Main Methods:

• Multivariate statistical analysis of viral genomic data.
• Comparative analysis of codon usage patterns between viruses and human hosts.
• Identification of over-represented and under-represented dinucleotides.

Main Results:

• Codon usage patterns in Sabia and Chapare viruses are influenced by compositional constraints and host selection.
• Specific codon usage signatures indicate adaptation to the human host, correlating with rapid infection.
• Over-representation of UpG and CpA dinucleotides was observed in both viruses and human genomes.
• A strong restraint in CpG dinucleotide usage suggests molecular mimicry of the human immune system.

Conclusions:

• Codon usage in Sabia and Chapare viruses provides insights into their adaptation to human hosts.
• These viral adaptation mechanisms may contribute to the rapid progression of hemorrhagic fever.
• The findings offer a basis for further research into drug discovery and antiviral therapies.