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00.002. Asfarviridae

Cite this publication as: ICTVdB Management (2006). 00.002. Asfarviridae. 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 vertebrate virus at the family level with data limited to classification details. If you have primary data on this virus, please submit them to ICTVdB using the online data entry systems or contact the ICTVdB management.

ICTVdB Virus Code: 00.002. Virus accession number: 00002FAM. Obsolete virus code: 02.; superceded accession number: 02000000.
NCBI Taxon Identifier NCBI Taxonomy ID: 137992.

Virion Properties

Morphology

Virions consist of an envelope, a capsid, a core, and a nucleoprotein complex. During their life cycle, virions have an extracellular phase; can occur in two phenotypes. Virus capsid is enveloped. Virions are spherical and measure 175-215 nm in diameter. Intracellular virions are not enveloped. Capsid/nucleocapsid is round and exhibits icosahedral symmetry (T=189-217). The isometric capsid has a diameter of 172-191 nm. Capsids appear hexagonal in outline. The capsid surface structure does not reveal a regular pattern with distinctive features and consists of 1892-2172 capsomers; each capsomer measures 13 nm in diameter. Capsomers consist of a hexagonal base with a central cavity. The core is cylindrical.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.19-1.24 g cm-3.

Nucleic Acid

The genome is not segmented and contains a single molecule of linear double-stranded DNA. The complete genome is 170000-190000 nucleotides long. The genome has a guanine + cytosine content of 39 %. The genome sequence has termini with hairpin structure. The genome has terminally redundant sequences. The terminally redundant sequences have reiterated inverted terminal sequences which are tandemly repeated; are reiterated internally as direct repeats in tandem form. Double-stranded DNA is covalently. Double-stranded DNA is linked at both ends.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

The viral genome encodes structural proteins and non-structural proteins.

Lipids

Lipids are present and located in the envelope. Viral membranes include glycolipids.

Release: The virus envelope is acquired from the host cell during the maturation process. Envelope lipids are derived from the host cell plasma membrane.

Biological Properties

Natural Host

Virus infects during its life cycle arthropod and vertebrate hosts. Virus has an enzootic cycle and is transmitted from arthropod vector to competent reservoir host, or arthropod vector to vertebrate host, but neither vertical nor horizontal transfer of the virus between the vertebrate hosts has been observed. Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Animalia.

Kingdom Animalia
Phylum Chordata.

Phylum Vertebrata
Subphylum Vertebrata; Class Mammalia.

Class Mammalia Order Artiodactyla;
Family Suidae; Subfamily Suinae; virus infects Sus.

Taxonomic Structure of the Family

00.002.0.01. Asfivirus.

References

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

PubMed References.

Foreign animal Diseases, British Columbia, Canada;



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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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