|
The ''Picornavirales'' are an order of viruses with vertebrate, insect, and plant hosts.〔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〕 This group consists of viruses which have positive-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 The evolution of these viruses may have preceded the separation of eukaryotes into the extant crown groups.〔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〕 ==Taxonomy== The taxonomy of this group has been reorganised by the ICTV in 2011. The ''Caliciviridae'' and the ''Potyviridae'' have been removed from this order. The ''Bacillariornaviridae'', the ''Labyrnaviridae'', and the ''Sequiviridae'' have been reduced to genera. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Picornavirales」の詳細全文を読む スポンサード リンク
|