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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.

00.036. Iridoviridae

Cite this publication as: ICTVdB Management (2006). 00.036. Iridoviridae. 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 an invertebrate and vertebrate virus at the family level.

ICTVdB Virus Code: 00.036. Virus accession number: 00036FAM. Obsolete virus code: 36.; superceded accession number: 36000000.
NCBI Taxon Identifier NCBI Taxonomy ID: 10486.

Name, Synonyms and Lineage

Synonym(s): Icosahedral cytoplasmic DNA virus group.

Virion Properties

Morphology

Virions consist of animal Iridioviridae an envelope, a capsid, and an internal lipid membrane. Virus capsid is not enveloped, or enveloped (with a membrane-derived envelope by a double layer envelope. Virions are spherical and measure 160-350 nm in diameter. Internal lipid membrane located between outer and inner protein shell. Capsid/nucleocapsid is round and exhibits icosahedral symmetry. The capsid is isometric and has a diameter of 125-300 nm. Capsids appear hexagonal in outline. The capsid consists of probably 72 capsomers. Surface projections are not prominent, or distinct, numerous filaments, some of which are trailing from the icosahedron.

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.26-1.36 g cm-3.

Nucleic Acid

The Mr of the genome constitutes 12-30% of the virion by weight. The genome is not segmented and contains a single molecule of linear double-stranded DNA. The complete genome is 150000-280000 nucleotides long. The genome has a guanine + cytosine content of 20-58 %. The genome contains unusual bases, they are 5-methyl deoxy-cytosine residues (in some genera). Double stranded DNA is can be circularly permuted (in some genera). The genome has terminally redundant sequences. The terminally redundant sequences have direct terminal repeats. Each virion contains a single copy of the genome to multiple copies of the genome; sometimes 2 copies per particle.

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 internal component. Virions are composed of 3-14% lipids by weight. The composition of viral lipids is known. The composition of viral lipids and host cell membranes are distinctly different. The lipids are not derived from host membranes.

Biological Properties

Natural Host

Virus infects during its life cycle a single type of vertebrate host.
Domain
Viral hosts belong to the Domain Eucarya.

Domain Eucarya
Kingdom Animalia.

Kingdom Animalia
Phylum Arthropoda, or Chordata.

Phylum Arthropoda
Subphylum Hexapoda; Class Insecta.

Phylum Vertebrata
Subphylum Vertebrata.

Class Osteichthyes, or Reptilia.

Taxonomic Structure of the Family

00.036.0.01. Iridovirus
00.036.0.02. Chloriridovirus
00.036.0.03. Ranavirus
00.036.0.04. Lymphocystovirus
00.036.0.05. Megalocystovirus.

Unassigned Viruses

List of Unassigned Viruses in the Family.

Data Sources and Contributions

The description has been compiled from data in the ICTV Report presented by Goorha R.

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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