| Genome sequence of Ostreococcus tauri virus OtV-2 throws light on the role of picoeukaryote niche separation in the ocean. | |
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MedLine Citation:
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PMID: 21289127 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Ostreococcus tauri, a unicellular marine green alga, is the smallest known free-living eukaryote and is ubiquitous in the surface oceans. The ecological success of this organism has been attributed to distinct low- and high-light-adapted ecotypes existing in different niches at a range of depths in the ocean. Viruses have already been characterized that infect the high-light-adapted strains. Ostreococcus tauri virus (OtV) isolate OtV-2 is a large double-stranded DNA algal virus that infects a low-light-adapted strain of O. tauri and was assigned to the algal virus family Phycodnaviridae, genus Prasinovirus. Our working hypothesis for this study was that different viruses infecting high- versus low-light-adapted O. tauri strains would provide clues to propagation strategies that would give them selective advantages within their particular light niche. Sequence analysis of the 184,409-bp linear OtV-2 genome revealed a range of core functional genes exclusive to this low-light genotype and included a variety of unexpected genes, such as those encoding an RNA polymerase sigma factor, at least four DNA methyltransferases, a cytochrome b(5), and a high-affinity phosphate transporter. It is clear that OtV-2 has acquired a range of potentially functional genes from its host, other eukaryotes, and even bacteria over evolutionary time. Such piecemeal accretion of genes is a trademark of large double-stranded DNA viruses that has allowed them to adapt their propagation strategies to keep up with host niche separation in the sunlit layers of the oceanic environment. |
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Authors:
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Karen D Weynberg; Michael J Allen; Ilana C Gilg; David J Scanlan; William H Wilson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. Date: 2011-02-02 |
Journal Detail:
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Title: Journal of virology Volume: 85 ISSN: 1098-5514 ISO Abbreviation: J. Virol. Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-04-18 Completed Date: 2011-06-14 Revised Date: 2011-11-01 |
Medline Journal Info:
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Nlm Unique ID: 0113724 Medline TA: J Virol Country: United States |
Other Details:
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Languages: eng Pagination: 4520-9 Citation Subset: IM |
Affiliation:
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Plymouth Marine Laboratory, Prospect Place, The Hoe, Plymouth PL1 3DH, United Kingdom. |
| Data Bank Information | |
Bank Name/Acc. No.:
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GENBANK/FN600414; RefSeq/NC_014789 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adaptation, Biological Chlorophyta / virology* DNA, Viral / chemistry, genetics Evolution, Molecular Genes, Viral Genome, Viral* Molecular Sequence Data Oceans and Seas Phycodnaviridae / genetics*, isolation & purification Sequence Analysis, DNA |
| Chemical | |
Reg. No./Substance:
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0/DNA, Viral |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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