00.016. Circoviridae - ICTVdB Index of Viruses

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Nature of Genome:
General Host Type:
Morphology:

ssDNA
Vertebrates
not enveloped, isometric

Family	00.016. Circoviridae
	Taxonomic Structure of the Family
	Family 00.016. Circoviridae Genus 00.016.0.01. Circovirus Genus 00.016.0.02. Gyrovirus

Genus	00.016.0.01. Circovirus
Type Species	00.016.0.01.001. Porcine circovirus - 1

List of Species Demarcation Criteria in the Genus

Since the rep genes are highly conserved, species demarcation can be best seen by phylogenetic comparison of the CP coding sequence. The suggested criteria demarcating species in the genus are

complete genome nt sequence less than 75%, and

CP sequence identity less than 70%.

List of Species in the Genus

The ICTVdB virus code and the viruses. Official virus species names are in italics. Tentative virus species names, alternative names ( ), isolates, strains, serotypes, subspecies, or rejected names are not italicized.

Virus codes, virus names, genome sequence accession numbers [ ] and assigned abbreviations ( ), are:

Species, their serotypes, strains and isolates

00.016.0.01.002.	Beak and feather disease virus
00.016.0.01.002.00.001.	Beak and feather disease virus	[AF080560]	(BFDV)
00.016.0.01.008.	Canary circovirus
00.016.0.01.008.00.001.	Canary circovirus	[AJ301633]	(CaCV)
00.016.0.01.007.	Goose circovirus
00.016.0.01.007.00.001.	Goose circovirus	[AJ304456]	(GoCV)
00.016.0.01.006.	Pigeon circovirus
00.016.0.01.006.00.001.	Pigeon circovirus	[AF252610]	(PiCV)
00.016.0.01.004.	Porcine circovirus - 1
00.016.0.01.004.00.001.	Porcine circovirus - 1	[Y09921]	(PCV-1)
00.016.0.01.005.	Porcine circovirus - 2
00.016.0.01.005.00.001.	Porcine circovirus - 2	[AF027217]	(PCV-2)

Tentative Species in the Genus

00.016.0.81.009.	Duck circovirus
00.016.0.81.009.00.001.	Duck circovirus	(DuCV)
00.016.0.81.010.	Finch circovirus
00.016.0.81.010.00.001.	Finch circovirus	(FiCV)
00.016.0.81.011.	Gull circovirus
00.016.0.81.011.00.001.	Gull circovirus	(GuCV)

Genus	00.016.0.02. Gyrovirus
Type Species	00.016.0.02.001. Chicken anemia virus

List of Species Demarcation Criteria in the Genus

Not appropriate.

List of Species in the Genus

Species, their serotypes, strains and isolates

00.016.0.02.001.	Chicken anemia virus
00.016.0.02.001.00.001.	Chicken anemia virus	[M55918]	(CAV)
00.016.0.02.001.00.001.	Chicken anemia virus	[M81223]	(CAV)

Tentative Species in the Genus

None reported.

List of Unassigned Viruses in the Family

None reported.

Similarity with other Taxa

Analysis of the genome structure, the origin of replication and the Rep proteins of viruses of the genus Circovirus show similarity to members of the plant virus family Nanoviridae and less pronounced similarity to members of the plant virus family Geminiviridae. CAV has features in common with viruses such as Torque Teno virus (TTV) and Torque Teno mini virus (TTMV), which are members of the genus Anellovirus. Members of both genera possess circular ssDNA genomes with similar but not identical negative sense genome organizations. The non-coding regions of CAV, TTV and TTMV are G-C rich and show a low level of nt homology. In addition, CAV, TTV and TTMV specify structural proteins that contain 2 aa motifs with putative roles in RCR and non-structural proteins that exhibit protein phosphatase activity.

Derivation of Names

Circo: sigla to indicate that the virus genome has a circular conformation Gyro: greek derivation from "gyrus" meaning "ring" or "circuit" to indicate that virus genome has a circular conformation

References

Collated from VIIIth ICTV Report

Contributed by

Todd, D., Bendinelli, M., Biagini, P., Hino, S., Mankertz, A., Mishiro, S., Niel, C., Okamoto, H., Raidal, S., Ritchie, B.W. and Teo, G.C.

Cite this publication as: Index of Viruses - Circoviridae (2006). In: ICTVdB - The Universal Virus Database, version 4. Büchen-Osmond, C (Ed), Columbia University, New York, USA. http://www.ncbi.nlm.nih.gov/ICTVdb/Ictv/fs_index.htm

Version 4 is based on Virus Taxonomy, Classification and Nomenclature of Viruses, 8th ICTV Report of the International Committee on Taxonomy of Viruses. Fauquet, CM, Mayo, MA, Maniloff, J, Desselberger, U, and Ball, LA (EDS) (2005) Elsevier/Academic Press, pp. 1259.

Additional References

Reference List from the 8th ICTV Report
ICTVdB taxon description
ICTVdB Picture Gallery

References to sequence databases at GenBank and PubMed Central:
PubMed Central References; nucleotide sequences; complete genomes

Additional access points to virus species lists, descriptions and images on the web:

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