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. 2010 Dec;84(24):12476-9.
doi: 10.1128/JVI.01489-10. Epub 2010 Oct 6.

Order to the viral universe

Mart Krupovič  1 , Dennis H Bamford
Affiliations

Order to the viral universe

Mart Krupovič et al. J Virol. 2010 Dec.
No abstract available

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Figures

FIG. 1.
FIG. 1.
What makes a virus a virus? Genome comparison of two mobile genetic elements, porcine circovirus 1 (PCV1; GenBank accession number AY660574) on the left, and Helicobacter pylori plasmid pAL236-5 (GenBank accession number HM125989) on the right. Genes for the rolling-circle replication initiation proteins in both mobile elements are shown by blue arrows, while the capsid protein-coding gene of PCV1 is depicted by a red arrow. Note that even though 50% of the PCV1 genes (1 out of 2) have counterparts in pAL236-5 plasmid, only the former can be considered a genuine virus, capable of forming a virion.
FIG. 2.
FIG. 2.
Diversity of genome replication proteins utilized by tailed dsDNA viruses infecting bacteria and archaea. Replication proteins that are also encoded by nontailed viruses and/or plasmids are boxed. Examples of viruses utilizing the indicated genome replication proteins are depicted. Abbreviations: PolA, -B, -C, and -Y, types A, B, C, and Y DNA polymerases, respectively; rPolB, RNA/DNA-primed type B DNA polymerase; pPolB, protein-primed type B DNA polymerase; prim-pol, primase-polymerase protein; MCM, minichromosome maintenance helicase; SFI-III, superfamily I to III helicases; θDR, theta-type DNA replication; RCR, rolling-circle DNA replication.
FIG. 3.
FIG. 3.
An example of a higher-level taxonomic grouping, a lineage, for dsDNA viruses encoding the double β-barrel capsid proteins. Viral family names are written in italics; if a virus has not been assigned to a family, its name is provided. Virus (family) names are color coded according to the host the corresponding viruses infect: red, eukaryotic viruses; green, bacterial viruses; blue, archaeal Sulfolobus turreted icosahedral virus (STIV); magenta, a satellite virus, Sputnik, of mamavirus that is associated with a eukaryotic host. The group of nucleocytoplasmic large DNA viruses (NCLDVs) is indicated. The asterisk indicates that an X-ray structure is available for the major capsid protein of a representative virus.
See this image and copyright information in PMC

References

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