Genetic and phenotypic studies on virulence variants of Ross River virus

Meek, A.D.J.

doi:10.25911/5d5fcb00ec5a6

1986

DOI: 10.25911/5d5fcb00ec5a6

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Genetic and phenotypic studies on virulence variants of Ross River virus

A.D.J. Meek¹

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1987

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Molecular evolution of viruses; ‘trees’, ‘clocks’ and ‘modules’

Gibbs

1987

Journal of Cell Science

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SUMMARYComparisons of the nucleotide sequences of viral genomes, and derived amino acid sequences, mostly confirm the traditional taxonomic groupings of viruses. These comparisons have also shown unexpected homologies between genes of viruses from different groups previously thought to be unrelated, and between some viral and non-viral genes. Comparisons of the three-dimensional structures of the particle proteins of some viruses have also revealed unexpected relationships, and, together with the sequence homologies, suggest that some ancestral viruses had 'modular' origins.Some of the sequence differences have been used to construct phylogenies. However, there is evidence that viral gene 'molecular clocks' do not always keep time consistently over very long or very short evolutionary time periods. Clues on evolution mostly come from comparative studies of living or fossil organisms. Fossils of viruses are not known, and thus clues of the origins and evolution of viruses are obtained by comparing extant forms. Fo r example, by comparing isolates of different viruses, or strains of viruses, one can infer the properties of their ancestors, and by comparing isolates obtained during an epidemic, and sequentially related to one another, one can observe directly the type and timing of evolutionary changes.

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Molecular evolution of viruses; ‘trees’, ‘clocks’ and ‘modules’

Gibbs

1987

Journal of Cell Science

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Genetic and phenotypic studies on virulence variants of Ross River virus

Cited by 1 publication

References 0 publications

Molecular evolution of viruses; ‘trees’, ‘clocks’ and ‘modules’

Molecular evolution of viruses; ‘trees’, ‘clocks’ and ‘modules’

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