A classification system for virophages and satellite viruses

A classification system for virophages and satellite viruses 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 . http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Archives of Virology Springer Journals

A classification system for virophages and satellite viruses

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Publisher
Springer Journals
Copyright
Copyright © 2016 by Springer-Verlag Wien
Subject
Biomedicine; Virology; Medical Microbiology; Infectious Diseases
ISSN
0304-8608
eISSN
1432-8798
D.O.I.
10.1007/s00705-015-2622-9
Publisher site
See Article on Publisher Site

Abstract

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 .

Journal

Archives of VirologySpringer Journals

Published: Jan 1, 2016

References

  • Gene from a novel plant virus satellite from grapevine identifies a viral satellite lineage
    Al Rwahnih, M; Daubert, S; Sudarshana, MR; Rowhani, A
  • Mimivirus and its virophage
    Claverie, JM; Abergel, C
  • Satellite tobacco mosaic virus
    Dodds, JA
  • Plant virus satellites
    Francki, RI
  • Evolutionary genomics of nucleo-cytoplasmic large DNA viruses
    Iyer, LM; Balaji, S; Koonin, EV; Aravind, L

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