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Molecular evolution of aphthoviruses

E Domingo1, M G Mateu, C Escarmís

  • 1Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain. edomingo@mvax.cbm.uam.es

Virus Genes
|January 1, 1995
PubMed
Summary

Aphthoviruses evolve under strict constraints, balancing high mutation rates with functional demands. Their complex quasispecies populations are shaped by selection and drift, impacting animal health.

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Area of Science:

  • Virology
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Aphthoviruses represent a significant group of animal pathogens.
  • Understanding their evolution is crucial for disease control and management.

Purpose of the Study:

  • To explore the evolutionary principles governing Aphthoviruses.
  • To highlight the interplay between genetic constraints and replication dynamics.

Main Methods:

  • Review of genetic and structural studies.
  • Analysis of viral genome replication, mutation, and recombination rates.
  • Examination of quasispecies dynamics and selection pressures.

Main Results:

  • Aphthovirus evolution is characterized by severe limitations to variation due to functional and structural constraints.

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  • High mutation and recombination rates during replication contribute to complex quasispecies distributions.
  • Evolution is driven by positive selection and random drift acting on these quasispecies.

    • Conclusions:

    • Viral RNA and protein tolerance to substitutions dictates mutant composition within quasispecies.
    • Functional competence of viral components is essential for survival and evolution.
    • Similar evolutionary concepts may be applicable to other RNA viruses.