Information de reference pour ce titreAccession Number: | 00005793-200612000-00012.
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Author: | Chen, Rubing *; Holmes, Edward C. *,+
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Institution: | (*)Center for Infectious Disease Dynamics, Department of Biology, The Pennsylvania State University (+)Fogarty International Center, National Institutes of Health, Bethesda, Maryland
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Title: | Avian Influenza Virus Exhibits Rapid Evolutionary Dynamics.[Article]
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Source: | Molecular Biology & Evolution. 23(12):2336-2341, December 2006.
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Abstract: | Influenza A viruses from wild aquatic birds, their natural reservoir species, are thought to have reached a form of stasis, characterized by low rates of evolutionary change. We tested this hypothesis by estimating rates of nucleotide substitution in a diverse array of avian influenza viruses (AIV) and allowing for rate variation among lineages. The rates observed were extremely high, at >10-3 substitutions per site, per year, with little difference among wild and domestic host species or viral subtypes and were similar to those seen in mammalian influenza A viruses. Influenza A virus therefore exhibits rapid evolutionary dynamics across its host range, consistent with a high background mutation rate and rapid replication. Using the same approach, we also estimated that the common ancestors of the hemagglutinin and neuraminidase sequences of AIV arose within the last 3,000 years, with most intrasubtype diversity emerging within the last 100 years and suggestive of a continual selective turnover.
(C) Society for Molecular Biology and Evolution 2006. Published by Oxford University Press. All rights reserved.
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Author Keywords: | avian influenza virus; relaxed molecular clock; emerging virus; H5N1; coalescent.
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Language: | English.
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Document Type: | RESEARCH ARTICLE.
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Journal Subset: | Life Sciences.
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ISSN: | 0737-4038
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NLM Journal Code: | mob, 8501455
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