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00.049.0.04. Betacryptovirus

Cite this publication as: ICTVdB Management (2006). 00.049.0.04. Betacryptovirus. In: ICTVdB - The Universal Virus Database, version 4. Büchen-Osmond, C. (Ed), Columbia University, New York, USA

Cite this site as: ICTVdB - The Universal Virus Database, version 4. http://www.ncbi.nlm.nih.gov/ICTVdb/ICTVdB/

Table of Contents

Classification

This is a description of a plant virus at the genus level.

ICTVdB Virus Code: 00.049.0.04. Virus accession number: 049004GE. Obsolete virus code: 49.0.4.; superceded accession number: 49040001.
NCBI Taxon Identifier NCBI Taxonomy ID: 39754.

Name, Synonyms and Lineage

Virus is of the family 00.049. Partitiviridae.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped, round with icosahedral symmetry. The nucleocapsid is isometric and has a diameter of (30-)38 nm. Capsids appear round, or hexagonal in outline. The capsomer arrangement is clearly visible.

Electron microscopic preparation and references: Virus preparation contains few virions.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.375 g cm-3. There are 1 sedimenting component(s) found in purified preparations. A260/A280 ratio is 1.31.

Nucleic Acid

The Mr of the genome constitutes 24% of the virion by weight. The genome is segmented; bipartite, segements are distributed among 2 particle types, or multipartite and segments are distributed over several particles of varying size, depending on the length of the genome enclosed. The genome consists of three segments of linear, double -stranded RNA. The complete genome is 4310-4803-5150 nucleotides long. RNA-1 is sequenced, and complete sequence is about 2050-2279-2550 nucleotides long. RNA-2 is about 1650-2040-2400 and RNA-3 is 1 about 450 nucleotides long. The multipartite genome is possible packaged in one particle, but it is not known whether they are packaged together or separately.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

Proteins constitute about 76% of the particle weight.

The viral genome encodes structural proteins.

Lipids

Lipids are not reported.

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

Kingdom Plantae
Phylum Magnoliophyta (Angiosperms, Class Magnoliopsida (Dicotyledonae).

Transmission and Vector Relationships

Virus is not transmitted by a vector. Virus is not transmitted by mechanical inoculation; not transmitted by grafting; not transmitted by contact between hosts; transmitted by seeds.

Experimental Hosts and Symptoms

Under experimental conditions susceptibility to infection by virus is found in few families. Susceptible host species are found in the Family Leguminosae-Papilionoideae, Umbelliferae. The following species were susceptible to experimental virus infection: Daucus carota, Medicago lupulina, Medicago sativa, Trifolium pratense, Trifolium repens.

Histopathology: Virions are found in the cytoplasm.

Cytopathology: Inclusions are not present in infected cells.

Taxonomic Structure of the Genus

Type species 00.049.0.04.001. White clover cryptic virus 2 .

Species in the Genus

List of Species in the Genus.

Tentative Species in the Genus

Tentative Species in the Genus.

Data Sources and Contributions

The description has been compiled from data in the ICTV Report presented by Ghabrial SA, Bozarth RF, Buck KW, Yamashita S, Martelli GP, Milne RG.

References

The following generic references are cited in the most recent ICTV Report.

PubMed References.



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DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia. ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses by Dr Cornelia Büchen-Osmond is written in DELTA. The virus descriptions in ICTVdB are coded by, or using data from experts in the field of virology or members ICTV. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations are automatically generated and formatted for display on the Web from the descriptions in DELTA-format. The description has been generated automatically from DELTA files. DELTA - DEscription Language for TAxonomy developed by Dr Mike Dallwitz, Toni Paine and Eric Zurcher, CSIRO Entomology, Canberra, Australia.

ICTVdB - The Universal Virus Database, developed for the International Committee on Taxonomy of Viruses (ICTV) by Dr Cornelia Büchen-Osmond, is written in DELTA. The virus descriptions in ICTVdB are coded by ICTV members and experts, or by the ICTVdB Management using data provided by the experts, the literature or the latest ICTV Report. The character list is the underlying code. All virus descriptions are based on the character list and natural language translations from the encoded descriptions are automatically generated and formatted for display on the Web.

Developer of the DELTA software: M. J. Dallwitz, T. Paine and E. Zurcher

ICTVdB and DELTA related References

Comments to ICTVdB Management
Last updated on 25 April 2006 by Cornelia Büchen-Osmond
Copyright © 2002    International Committee on Taxonomy of Viruses.    All rights reserved.


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