Abstract：
:The poxviruses (Poxviridae) are a family of viruses with double-stranded DNA genomes and substantial numbers (often >200) of genes per genome. We studied the patterns of gene gain and loss over the evolutionary history of 17 poxvirus complete genomes. A phylogeny based on gene family presence/absence showed good agreement with families based on concatenated amino acid sequences of conserved single-copy genes. Gene duplications in poxviruses were often lineage specific, and the most extensively duplicated viral gene families were found in only a few of the genomes analyzed. A total of 34 gene families were found to include a member in at least one of the poxvirus genomes analyzed and at least one animal genome; in 16 (47%) of these families, there was evidence of recent horizontal gene transfer (HGT) from host to virus. Gene families with evidence of HGT included several involved in host immune defense mechanisms (the MHC class I, interleukin-10, interleukin-24, interleukin-18, the interferon gamma receptor, and tumor necrosis factor receptor II) and others (glutaredoxin and glutathione peroxidase) involved in resistance of cells to oxidative stress. Thus "capture" of host genes by HGT has been a recurrent feature of poxvirus evolution and has played an important role in adapting the virus to survive host antiviral defense mechanisms.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Hughes AL,Friedman Rdoi
10.1016/j.ympev.2004.12.008keywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
186-95issue
1eissn
1055-7903issn
1095-9513pii
S1055-7903(04)00395-1journal_volume
35pub_type
杂志文章abstract：:The order Rodentia includes nearly half of all living mammalian species. Phylogenetic relationships among 22 species of rodents were investigated by use of a 1.2-kb region from exon 1 of the single-copy nuclear gene IRBP. IRBP has been extensively used for study of interordinal phylogeny in mammals, which allowed incl...
journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
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pub_type： 杂志文章
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journal_title：Molecular phylogenetics and evolution
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章
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journal_title：Molecular phylogenetics and evolution
pub_type： 杂志文章
doi：10.1016/j.ympev.2008.07.018
更新日期：2008-11-01 00:00:00
