A classification system for virophages and satellite viruses

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• 作者：Mart Krupovic ; Jens H. Kuhn ; Matthias G. Fischer
• 刊名：Archives of Virology
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：161
• 期：1
• 页码：233-247
• 全文大小：1,668 KB
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• 作者单位：Mart Krupovic (1)
  Jens H. Kuhn (2)
  Matthias G. Fischer (3)
  
  1. Unité Biologie Moléculaire du Gène chez les Extrêmophiles, Department of Microbiology, Institut Pasteur, Paris, France
  2. Integrated Research Facility at Fort Detrick, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Fort Detrick, Frederick, MD, USA
  3. Max Planck Institute for Medical Research, Heidelberg, Germany
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Biomedicine
  Virology
  Medical Microbiology
  Infectious Diseases
  
• 出版者：Springer Wien
• ISSN：1432-8798

文摘

Satellite viruses encode structural proteins required for the formation of infectious particles but depend on helper viruses for completing their replication cycles. Because of this unique property, satellite viruses that infect plants, arthropods, or mammals, as well as the more recently discovered satellite-like viruses that infect protists (virophages), have been grouped with other, so-called “sub-viral agents.” For the most part, satellite viruses are therefore not classified. We argue that possession of a coat-protein-encoding gene and the ability to form virions are the defining features of a bona fide virus. Accordingly, all satellite viruses and virophages should be consistently classified within appropriate taxa. We propose to create four new genera — Albetovirus, Aumaivirus, Papanivirus, and Virtovirus — for positive-sense single-stranded (+) RNA satellite viruses that infect plants and the family Sarthroviridae, including the genus Macronovirus, for (+)RNA satellite viruses that infect arthopods. For double-stranded DNA virophages, we propose to establish the family Lavidaviridae, including two genera, Sputnikvirus and Mavirus.