00.111.0.01. Cheravirus - ICTVdB Index of Viruses

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Nature of Genome:
General Host Type:
Morphology:

positive-stranded ssRNA
Plants
not enveloped, isometric


	Taxonomic Structure of the Genus
	Family 00.111. Unassigned Genus 00.111.0.01. Cheravirus

Genus	00.111.0.01. Cheravirus
Type Species	00.111.0.01.001. Cherry rasp leaf virus

List of Species Demarcation Criteria in the Genus

Type of biological vector
Host range
Absence of serological cross-reaction Absence of cross-protection
Sequence similarity:

less than 75% as sequence identity in the CPs within a species.

less than 75% as sequence identity in the proteinase-polymerase region.

Members of CRLV and ALSV were distinguished because:

The host ranges differ, although some hosts including apple are common.

Purified ALSV particles did not react with polyclonal antibodies against AVBV in either gel diffusion tests or immunoblot analysis.

The as sequence identities between three CPs, Vp25, Vp20, and Vp24, and 65%, respectively.

List of Species in the Genus

The ICTVdB virus code and the viruses. Official virus species names are in italics. Tentative virus species names, alternative names ( ), isolates, strains, serotypes, subspecies, or rejected names are not italicized.

Virus codes, virus names, genome sequence accession numbers [ ] and assigned abbreviations ( ), are:

Species, their serotypes, strains and isolates

00.111.0.01.002.	Apple latent spherical virus
00.111.0.01.002.00.001.	Apple latent spherical virus	RNA-1: [NC_003787]	(ALSV)
00.111.0.01.002.00.001.	Apple latent spherical virus	RNA-2: [NC_003788]	(ALSV)
00.111.0.01.003.	Cherry rasp leaf virus
00.111.0.01.003.00.001.	Cherry rasp leaf virus		(CRLV)
00.111.0.01.003.00.002.	Flat apple virus	RNA-2: [AY122330]

Tentative Species in the Genus

None reported.

00.111.0.81.004.	Arracacha virus B
00.111.0.81.004.00.001.	Arracacha virus B	(AVB)
00.111.0.81.005.	Artichoke vein banding virus
00.111.0.81.005.00.001.	Artichoke vein banding virus	(AVBV)

Similarity with other Taxa

The as sequences in the conserved NTP-binding and RdRp domains of the polyproteins resemble those in the polyproteins encoded by RNA of viruses in the unassigned genus Sadwavirus, in the families Sequiviridae, Comoviridae, Picornaviridae and Dicistroviridae. The number and sizes of the CPs resemble those of viruses in the families Picornaviridae and Sequiviridae.

Like sadwaviruses, cheraviruses were previously considered as atypical but tentative members of the genus Nepovirus (family Comoviridae), but were distinguished on the basis of their genomic organization, in particular the number of CP species, as well as sequence homologies and, for some of them, natural transmission by insects.

Derivation of Names

Chera: from Cherry rasp leaf virus, the type member.
CRLV was preferred as a type member to ALSV despite the lack of a complete sequence because more biological data were available.

References

Collated from VIIIth ICTV Report

Contributed by

Le Gall, O., Iwanami, T., Karasev, A.V., Jones, T., Lehto, K., Sanfaçon, H., Wellink, J., Wetzel, T. and Yoshikawa, N.

Cite this publication as: Index of Viruses - Cheravirus (2006). In: ICTVdB - The Universal Virus Database, version 4. Büchen-Osmond, C (Ed), Columbia University, New York, USA. http://www.ncbi.nlm.nih.gov/ICTVdb/Ictv/fs_index.htm

Version 4 is based on Virus Taxonomy, Classification and Nomenclature of Viruses, 8th ICTV Report of the International Committee on Taxonomy of Viruses. Fauquet, CM, Mayo, MA, Maniloff, J, Desselberger, U, and Ball, LA (EDS) (2005) Elsevier/Academic Press, pp. 1259.

Additional References

Reference List from the 8th ICTV Report
ICTVdB taxon description
ICTVdB Picture Gallery

References to sequence databases at GenBank and PubMed Central:
PubMed Central References; nucleotide sequences; complete genomes

Additional access points to virus species lists, descriptions and images on the web:

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