Crinivirus

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Crinivirus
Virus classification
Group: Group IV ((+)ssRNA)
Family: Closteroviridae
Genus: Crinivirus

Crinivirus is a genus of viruses that belong to the family Closteroviridae. They are also known as the lettuce infectious yellows virus group. They are linear, single-stranded positive sense RNA viruses (and are therefore group IV). The viruses of the genus are plant viruses [1].

Examples of species whose entire genomes have been sequenced that are currently classified into the genus include ‘’Sweet potato chlorotic stunt virus’’ (SPCSV) and ‘’Lettuce infectious yellows virus’’ (LIYV)[2]. Other examples of viruses belonging to that genus include ‘’Abutilon yellows virus; Cucurbit yellow stunting disorder virus; Lettuce chlorosis virus; Tomato chlorosis virus; Tomato infectious chlorosis virus; Beet pseudoyellows virus, Diodia vein chlorosis virus and Potato yellow vein virus’’[3]. Note that this is not an exhaustive list of all the viruses in the genus.

[edit] Virus particle structure

The Universal Virus Database describes that the virions of the genus each consists of a non-enveloped, filamentous capsid “with a length of 1200-2000 nm and a width of 10-13 nm”[4]. The capsid is also described to have “helical symmetry.”

[edit] Genetics

The viruses of this genus have segmented, bipartite genomes that add up to 7,500 -19,500 nucleotides in length. The Universal Virus Database also describes that their genome sequences near their 3'-ends are capable of hairpin-loop formation and also believe that their 5'-ends may have methylated caps[5]. Their genomes also code for proteins that do not form part of the virion particles as well as structural proteins.

[edit] References

  1. ^ ICTVdB Management (2006). 00.017.0.02. Crinivirus. In: ICTVdB - The Universal Virus Database, version 4. Büchen-Osmond, C. (Ed), Columbia University, New York, USA
  2. ^ Journal of Virology. 2002 September; 76(18): 9260–9270
  3. ^ ICTVdB Management (2006)
  4. ^ ICTVdB Management (2006)
  5. ^ ICTVdB Management (2006)