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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.

00.068. Tectiviridae

Cite this publication as: ICTVdB Management (2006). 00.068. Tectiviridae. 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 bacterial virus at the family level.

ICTVdB Virus Code: 00.068. Virus accession number: 00068FAM. Obsolete virus code: 68.; superceded accession number: 68000000.
NCBI Taxon Identifier NCBI Taxonomy ID: 10656.

Name, Synonyms and Lineage

Synonym(s): Phages with double capsids.

Virion Properties

Morphology

Virions consist of a capsid and an internal lipid membrane. Virus capsid is not enveloped. Virions are tail-less, but can produce tail-like tubes; upon adsorption, or after chloroform treatment. Capsid/nucleocapsid is round and exhibits icosahedral symmetry. The isometric capsid has a diameter of 63 nm. The capsid shells of virions are composed of two layers. The outer capsid consists of a smooth, rigid 3 nm thin protein shell and appear to have a hexagonal in outline. Surface projections are distinct 20 nm long spikes protruding from each apex, or lost during preparation. Inner capsids consist of a 5-6 nm flexible shell made from a thick lipoprotein vesicle. The genome forms a tightly packed coil.

Electron micrograph of Tectiviridae by H.-W. Ackermann, Laval University, Quebec, Canada. 

Physicochemical and Physical Properties

Virions have a buoyant density in CsCl of 1.29 g cm-3.

Nucleic Acid

The Mr of the genome constitutes 14-15% of the virion by weight. The genome is not segmented and contains a single molecule of linear double-stranded DNA. The complete genome is 147000-157000 nucleotides long.

GenBank records for nucleotide sequences; complete genome sequences.

Proteins

The viral genome encodes structural proteins.

Lipids

Lipids are present and located in the inner vesicle (constitute 60%). Virions are composed of 15% lipids by weight. The composition of viral lipids and host cell membranes are identical. The lipids are host derived. Lipids in the viral membrane have a bilayer structure (and seem to be in a liquid crystalline phase). Viral membranes include 56 % phosphatidyl ethanolamine and phosphatidyl glycerol (37 %; they are higher than in the host, but vary according to the host strain).

Biological Properties

Natural Host

Domain
Viral hosts belong to the Domain Bacteria.

Domain Bacteria
Phylum Firmicutes.

Taxonomic Structure of the Family

00.068.0.01. Tectivirus.

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 Ackermann H-W, Bamford DH.

References

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

PubMed References.

Images

Taxon images: • EM by Hans Ackermann, Laval University, Quebec.



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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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