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Viral Long-Term Evolutionary Strategies Favor Stability over Proliferation.

Stéphane Aris-Brosou1,2, Louis Parent3, Neke Ibeh3

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PubMed
Summary
This summary is machine-generated.

Viral evolution is driven by mutation rates and genome size, with selection primarily impacting single-stranded viruses and correlated evolution favoring DNA viruses. Joint evolutionary processes shape viral stability and epidemiological potential.

Keywords:
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Area of Science:

  • Virology
  • Evolutionary Biology
  • Genomics

Background:

  • Viruses exhibit high mutation rates, with single-stranded RNA viruses evolving fastest and double-stranded DNA viruses approaching bacterial rates.
  • Mutation rates correlate negatively with genome size, indicating selection as a key driver of viral evolution.
  • The influence of intragenomic interactions on viral evolution remains less understood.

Purpose of the Study:

  • To investigate the roles of selection and intragenomic interactions in the long-term evolution of human-infecting viruses.
  • To identify virus types and functions affected by episodic diversifying selection and correlated evolution.
  • To understand how these evolutionary forces jointly shape viral life cycles and epidemiological potential.

Main Methods:

  • Comprehensive analysis of single-stranded RNA (ssRNA), single-stranded DNA (ssDNA), double-stranded RNA (dsRNA), and double-stranded DNA (dsDNA) viruses.
  • Examination of episodic diversifying selection and correlated evolution across different viral genomes.
  • Investigation of the interplay between selection and correlated evolution at the amino acid level.

Main Results:

  • Selection predominantly impacts single-stranded viruses, while correlated evolution is more common in DNA viruses.
  • Both processes, independently, primarily affect viral replication.
  • Genes jointly influenced by selection and correlated evolution are critical for viral stability, prioritizing it over proliferation.

Conclusions:

  • The joint action of selection and correlated evolution, not selection alone, shapes viral evolutionary trajectories.
  • These intertwined processes are intimately linked at the amino acid level.
  • Understanding these joint evolutionary forces is crucial for predicting viral epidemiological potential.