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Descriptions are generated automatically from the ICTVdB database including links. Some descriptions are only very basic and links may point to documents that are not yet published on the Web.

00.065. Sequiviridae

Cite this publication as: ICTVdB Management (2006). 00.065. Sequiviridae. In: ICTVdB - The Universal Virus Database, version 3. 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 family level.

ICTVdB Virus Code: 00.065. Virus accession number: 00065FAM. Obsolete virus code: 65.; superceded accession number: 65000000.
NCBI Taxon Identifier NCBI Taxonomy ID: 39727.

Virion Properties

Morphology

Virions consist of a capsid. Virus capsid is not enveloped, round with polyhedral symmetry. The isometric capsid has a diameter of about 30 nm. Capsids appear round. The capsomer arrangement is not obvious.

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

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.297-1.393-1.49 g cm-3. There are 1 sedimenting component(s) found in purified preparations, or 2 sedimenting component(s) found in purified preparations. The sedimentation coefficient is 153-156-159 S20w; of the other(s) are 60 S20w. A260/A280 ratio is 1.46-1.597-1.67. The thermal inactivation point (TIP) is at 57.5-61.87-65°C. The longevity in vitro (LIV) is 1-3.25-7 days. Although the titer is dependent on the host, the decimal exponent (DEX) of the dilution end point is usually around 3, or 4, or 5.

Nucleic Acid

The Mr of the genome constitutes 40% of the virion by weight. The genome is monopartite. Only one particle size of linear, positive-sense, single-stranded RNA is recovered. The genome is sequenced, and complete sequence is about 9000-12000 nucleotides long. The 5'-end of the genome has a probably genome-linked protein (VPg).

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

The viral genome encodes structural proteins. Virions consist of 3 structural protein(s).

Lipids

Lipids are not reported.

Genome Organization and Replication

By itself, genomic nucleic acid is infectious (however, infectivity is protease- sensitive).

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Plantae.

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

Class Magnoliopsida (Dicotyledonae)
Subclass ROSIDAE, or ASTERIDAE.

Severity and Occurrence of Disease

Host: Signs and symptoms persist.

Transmission and Vector Relationships

Virus is transmitted by a vector. Virus is transmitted by mechanical inoculation; not transmitted by seeds; not transmitted by pollen.

Vector Transmission:
Virus is transmitted by arthropods, by insects of the order Hemiptera, family Aphididae. Virus is transmitted in a semi-persistent manner; lost by the vector when it moults; not transmitted congenitally to the progeny of the vector; requires, for vector transmission, a helper virus.

Experimental Hosts and Symptoms

Under experimental conditions susceptibility to infection by virus is found in several families. Susceptible host species are found in the Family Amaranthaceae, Chenopodiaceae, Compositae, Cucurbitaceae, Portulacaceae, Solanaceae, Tetragoniaceae, Umbelliferae. The following species were susceptible to experimental virus infection: Aethusa cynapium, Anethum graveolens, Anthriscus cerefolium, Anthriscus sylvestris, Apium graveolens, Beta vulgaris, Chaerophyllum temulum, Chenopodium amaranticolor, Chenopodium ambrosioides, Chenopodium capitatum, Chenopodium murale, Chenopodium quinoa, Cichorium endiva, Coriandrum sativum, Cucumis sativus, Datura stramonium, Daucus carota, Gomphrena globosa, Heracleum sphondylium, Hyoscyamus niger, Lactuca sativa, Lactuca serriola, Lactuca virosa, Lycopersicon esculentum, Montia perfoliata, Nicotiana benthamiana, Nicotiana clevelandii, Nicotiana glutinosa, Nicotiana rustica, Nicotiana sylvestris, Nicotiana tabacum, Oenanthe aquatica, Pastinaca sativa, Petroselinum crispum, Petunia x hybrida, Spinacia oleracea, Taraxacum officinale, Tetragonia tetragonioides, Torilis japonica.

Experimentally infected insusceptible Hosts: Families containing insusceptible hosts: Compositae, Cruciferae, or Leguminosae-Papilionoideae, Umbelliferae. Species inoculated with virus that do not show signs of susceptibility: Apium graveolens, Brassica campestris ssp. pekinensis, Calendula officinalis, Cheiranthus cheiri, Foeniculum vulgare, Phaseolus vulgaris, Pisum sativum, Senecio vulgaris, Sonchus oleraceus, Verbesina encelioides, Vigna unguiculata.

Histopathology: Virions are found in the cytoplasm.

Cytopathology: Inclusions are present in infected cells. Inclusion bodies in the host cell are found in the cytoplasm. Cytoplasmic inclusions are membranous bodies. Inclusions contain mature virions.

Geographical Distribution

The virus occurs in Czechoslovakia (former), or Germany, or the Netherlands, or Norway, or the United Kingdom.

Taxonomic Structure of the Family

00.065.0.01. Sequivirus
00.065.0.02. Waikavirus.

Data Sources and Contributions

The description has been compiled from data in the ICTV Report presented by Mayo MA, Murant AF, Turnbull-Ross AD, Reavy B, Hamilton RI, Gingery RE.

References

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

PubMed References.

Images

Taxon images: • EM from IACR Rothamsted. • EM from IACR Rothamsted.



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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
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