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. 2018 May;99(5):611-612.
doi: 10.1099/jgv.0.001045. Epub 2018 Mar 26.

ICTV Virus Taxonomy Profile: Avsunviroidae

Francesco Di Serio  1 , Shi-Fang Li  2 , Jaroslav Matoušek  3 , Robert A Owens  4 , Vicente Pallás  5 , John W Randles  6 , Teruo Sano  7 , Jacobus Th J Verhoeven  8 , Georgios Vidalakis  9 , Ricardo Flores  5 , Ictv Report Consortium
Affiliations

ICTV Virus Taxonomy Profile: Avsunviroidae

Francesco Di Serio et al. J Gen Virol. 2018 May.

Abstract

Members of the family Avsunviroidae have a single-stranded circular RNA genome that adopts a rod-like or branched conformation and can form, in the strands of either polarity, hammerhead ribozymes involved in their replication in plastids through a symmetrical RNA-RNA rolling-circle mechanism. These viroids lack the central conserved region typical of members of the family Pospiviroidae. The family Avsunviroidae includes three genera, Avsunviroid, Pelamoviroid and Elaviroid, with a total of four species. This is a summary of the ICTV Report on the taxonomy of the family Avsunviroidae, which is available at http://www.ictv.global/report/avsunviroidae.

Keywords: Avsunviroidae; ICTV; avocado sunblotch viroid; eggplant latent viroid; peach latent mosaic viroid; taxonomy; viroid.

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Figures

Fig. 1.
Fig. 1.
Proposed secondary structures of representative members of the family Avsunviroidae. Conserved nucleotides in the hammerhead catalytic core are boxed with filled and open shadings referring to ribozymes formed in the viroid (+) and (-) strand, respectively.
Fig. 2.
Fig. 2.
Hammerhead structures formed by the (+) strand of two viroids. Catalytic cores (black boxes), self-cleavage sites (arrows) and helices (I, II, III) are indicated. Figure modified from [7].
See this image and copyright information in PMC

References

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