Picornavirales
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Picornavirales
| Picornavirales | |
|---|---|
| Virus classification | |
| Group: | Group IV ((+)ssRNA) |
| Order: | Picornavirales |
| Families | |
|
Bacillariornaviridae |
|
The Picornavirales are an order of viruses with vertebrate, insects and plant hosts.[1] This group consists of viruses which have (+) sense single stranded RNA genomes.
Five families within this group - Caliciviridae, Dicistroviridae, Picornaviridae, Potyviridae and Sequiviridae share a number of common features:
- conserved RNA-dependent RNA polymerase
- genome has a protein attached to the 5' end
- no overlapping open reading frames within the genome
- all the RNAs are translated into a polyprotein before processing
It has been suggested that the evolution of these viruses may have preceded the separation of eukaryotes into the extant crown groups.[2]
References
- ^ Le Gall O, Christian P, Fauquet CM, King AM, Knowles NJ, Nakashima N, Stanway G, Gorbalenya AE "Picornavirales, a proposed order of positive-sense single-stranded RNA viruses with a pseudo-T = 3 virion architecture." Arch Virol. 2008;153(4):715-27
- ^ Koonin EV, Wolf YI, Nagasaki K, Dolja VV (2008) The Big Bang of picorna-like virus evolution antedates the radiation of eukaryotic supergroups. Nat Rev Microbiol. 6(12):925-939
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