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Rapid, Seamless Generation of Recombinant Poxviruses using Host Range and Visual Selection
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Selective pressure dominates the synonymous codon usage in parvoviridae.

Sheng-Lin Shi1, Yi-Ren Jiang, Yan-Qun Liu

  • 1Postdoctoral Station of Plant Protection, Shenyang Agricultural University, No.120 Dongling Road, Shenyang, P.R.China. shishenglin@126.com

Virus Genes
|September 22, 2012
PubMed
Summary
This summary is machine-generated.

Natural selection shapes codon usage bias in the Parvoviridae virus family, influencing gene composition. This study analyzed 58 genomes, finding GC content and selective pressure are key factors, not gene length.

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Area of Science:

  • Virology
  • Molecular Biology
  • Bioinformatics

Background:

  • Parvoviridae are small, non-enveloped viruses infecting diverse hosts, with some used in gene therapy.
  • Understanding viral genome composition, including codon usage, is crucial for evolutionary and functional insights.
  • Synonymous codon usage patterns can reveal evolutionary pressures acting on viral genomes.

Purpose of the Study:

  • To investigate the synonymous codon usage patterns within the Parvoviridae family.
  • To identify the factors driving codon bias, such as mutation pressure and natural selection.
  • To compare codon usage patterns with taxonomic classification.

Main Methods:

  • Analysis of 58 available Parvoviridae genomes using multivariate statistical methods.
  • Utilized ENc-plot and neutrality plot analyses to infer evolutionary pressures.
  • Performed correspondence analysis and cluster analysis based on codon usage data.

Main Results:

  • Nine Parvoviridae viruses exhibited strong codon bias; others showed a weak trend.
  • Selective pressure, not mutation, was identified as the dominant force shaping coding sequences.
  • Overall GC content and GC content at the third codon position significantly influenced codon usage patterns.
  • Gene length did not directly impact codon usage.
  • Subfamilies Densovirinae and Parvovirinae shared preferred codons but differed significantly in usage frequencies.
  • Cluster analysis based on codon usage was incongruent with taxonomic classification, with Adeno-associated viruses forming a distinct clade.

Conclusions:

  • Natural selection is the primary determinant of codon bias in the Parvoviridae family.
  • Codon usage patterns provide a distinct evolutionary perspective, separate from traditional taxonomic groupings.
  • GC content and selective pressures are key drivers of viral genome composition in this family.