00.077. Tymoviridae - ICTVdB Index of Viruses

[Home] [ICTV Taxonomy - Index of Viruses] [Virus Descriptions] [Character List] [Picture Gallery]
[Tutorial] [Online Data Retrieval & Identification] [Virus Isolate Registration & Submission] [Search]

Nature of Genome:
General Host Type:
Morphology:

positive-stranded ssRNA
Plants, Invertebrates
not enveloped, isometric

Family	00.077. Tymoviridae
	Taxonomic Structure of the Family
	Family 00.077. Tymoviridae Genus 00.077.0.01. Tymovirus Genus 00.077.0.02. Marafivirus Genus 00.077.0.03. Maculavirus Genus 00.077.0.00. unassigned

Genus	00.077.0.01. Tymovirus
Type Species	00.077.0.01.001. Turnip yellow mosaic virus

List of Species Demarcation Criteria in the Genus

The criteria demarcating genera in the family are:

Biological criteria: Tymoviruses are mechanically transmissible, invade parenchyma tissues, and infect dicotyledonous plants. Marafiviruses and maculaviruses are both phloem-limited and are not mechanically transmissible to leaf surfaces. Marafiviruses infect primarily monocotyledonous plants, maculaviruses infect dicotyledonous plants.

Epidemiological criteria: Tymoviruses are transmitted by beetles, most marafiviruses by leafhoppers. Maculaviruses have no known vector.

Cytopathological criteria: Tymoviruses elicit the formation of double-membraned vesicles at the periphery of chloroplasts, maculaviruses elicit them at the periphery of mitochondria. Chloroplast vesicles induced by Poinsettia mosaic virus are singlemembraned.

Physicochemical criteria:

(a) Genome size: 6.0-6.7 kb (tymoviruses), 6.3-6.5 kb (marafiviruses), 7.5 kb (maculaviruses);
(b) number and molecular mass of the CP: one subunit type of 20 kDa (tymoviruses), 24 kDa (maculaviruses) or 21 kDa (PnMV), or two subunit types (21 and 24 kDa) (marafiviruses).

Molecular criteria: Tymovirus genomes have three ORFs and a tRNA-like structure at the 3'-terminus. Maculavirus genomes have four ORFs, a 3'-terminal poly(A) tail. Two genome types have been reported for marafiviruses: (i) a single large ORF and a 3'-terminal poly(A) tail; (ii) two ORFs and no poly(A) tract. Tymovirus genomes possess a conserved sequence that serves as a sgRNA promoter known as the "tymobox"; the genomes from marafiviruses and PnMV contain a variant termed the "marafibox", while no such sequence is evident in maculavirus genomes.

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

00.077.0.01.002.	Andean potato latent virus
00.077.0.01.002.00.001.	Andean potato latent virus	[AF035402]	(APLV)
00.077.0.01.003.	Belladonna mottle virus
00.077.0.01.003.00.001.	Belladonna mottle virus	[X54529]	(BeMV)
00.077.0.01.004.	Cacao yellow mosaic virus
00.077.0.01.004.00.001.	Cacao yellow mosaic virus	[X54354]	(CYMV)
00.077.0.01.005.	Calopogonium yellow vein virus
00.077.0.01.005.00.001.	Calopogonium yellow vein virus	[U91413]	(CalYVV)
00.077.0.01.023.	Chayote mosaic virus
00.077.0.01.023.00.001.	Chayote mosaic virus	[AF195000]	(ChMV)
00.077.0.01.006.	Clitoria yellow vein virus
00.077.0.01.006.00.001.	Clitoria yellow vein virus	[M15963]	(CYVV)
00.077.0.01.007.	Desmodium yellow mottle virus
00.077.0.01.007.00.001.	Desmodium yellow mottle virus	[AF035201]	(DYMoV)
00.077.0.01.008.	Dulcamara mottle virus
00.077.0.01.008.00.001.	Dulcamara mottle virus	[AF035634]	(DuMV)
00.077.0.01.009.	Eggplant mosaic virus
00.077.0.01.009.00.001.	Eggplant mosaic virus	[J04374]	(EMV)
00.077.0.01.010.	Erysimum latent virus
00.077.0.01.010.00.001.	Erysimum latent virus	[AF098523]	(ErLV)
00.077.0.01.011.	Kennedya yellow mosaic virus
00.077.0.01.011.00.001.	Kennedya yellow mosaic virus	[D00637]	(KYMV)
00.077.0.01.012.	Melon rugose mosaic virus
00.077.0.01.012.00.001.	Melon rugose mosaic virus		(MRMV)
00.077.0.01.013.	Okra mosaic virus
00.077.0.01.013.00.001.	Okra mosaic virus	[AF035202]	(OkMV)
00.077.0.01.014.	Ononis yellow mosaic virus
00.077.0.01.014.00.001.	Ononis yellow mosaic virus	[J04375]	(OYMV)
00.077.0.01.015.	Passion fruit yellow mosaic virus
00.077.0.01.015.00.001.	Passion fruit yellow mosaic virus	[AF47107]	(PFYMV)
00.077.0.01.016.	Peanut yellow mosaic virus
00.077.0.01.016.00.001.	Peanut yellow mosaic virus		(PeYMV)
00.077.0.01.025.	Petunia vein banding virus
00.077.0.01.025.00.001.	Petunia vein banding virus	[AF210709]	(PetVBV)
00.077.0.01.017.	Physalis mottle virus
00.077.0.01.017.00.001.	Physalis mottle virus	[Y16104]	(PhyMV)
00.077.0.01.018.	Plantago mottle virus
00.077.0.01.018.00.001.	Plantago mottle virus		(PIMOV)
00.077.0.01.019.	Scrophularia mottle virus
00.077.0.01.019.00.001.	Scrophularia mottle virus		(SrMV)
00.077.0.01.020.	Turnip yellow mosaic virus
00.077.0.01.020.00.001.	Turnip yellow mosaic virus	[J04373]	(TYMV)
00.077.0.01.020.00.001.	Turnip yellow mosaic virus	[X16378]	(TYMV)
00.077.0.01.020.00.001.	Turnip yellow mosaic virus	[X07441]	(TYMV)
00.077.0.01.021.	Voandzeia necrotic mosaic virus
00.077.0.01.021.00.001.	Voandzeia necrotic mosaic virus		(VNMV)
00.077.0.01.022.	Wild cucumber mosaic virus
00.077.0.01.022.00.001.	Wild cucumber mosaic virus	[AF035633]	(WCMV)

Tentative Species in the Genus

None reported.

Genus	00.077.0.02. Marafivirus
Type Species	00.077.0.02.001. Maize rayado fino virus

List of Species Demarcation Criteria in the Genus

The criteria demarcating species in the genus are:

Overall sequence identity of less than 80%

Capsid protein sequences less than 90% identical

Differences in the 3'-terminal structure and in the number of ORFs

Differential host range

Vector specificity

Serological specificity

Different effects on cell ultrastructure

Marafibox that is distinct in sequence from the tymobox

List of Species in the Genus

Species, their serotypes, strains and isolates

00.077.0.02.002.	Bermuda grass etched-line virus
00.077.0.02.002.00.001.	Bermuda grass etched-line virus	[AY040531]	(BELV)
00.077.0.02.003.	Maize rayado fino virus
00.077.0.02.003.00.001.	Maize rayado fino virus	[AF265566]	(MRFV)
00.077.0.02.004.	Oat blue dwarf virus
00.077.0.02.004.00.001.	Oat blue dwarf virus	[U87832]	(OBDV)

Tentative Species in the Genus

00.077.0.82.005.	Grapevine asteroid mosaic-associated virus
00.077.0.82.005.00.001.	Grapevine asteroid mosaic-associated virus	[AJ249357]	(GAMaV)
00.077.0.82.005.00.001.	Grapevine asteroid mosaic-associated virus	[AJ249358]	(GAMaV)
00.077.0.82.006.	Grapevine rupestris vein feathering virus
00.077.0.82.006.00.001.	Grapevine rupestris vein feathering virus	[AY128949]	(GRVFV)

Genus	00.077.0.03. Maculavirus
Type Species	00.077.0.03.001. Grapevine fleck virus

List of Species Demarcation Criteria in the Genus

The criteria demarcating species in the genus are:

Overall sequence identity of less than 80%

Capsid protein sequences identity less than 90%

Serological specificity

Lack of tymobox/marafibox sequence

List of Species in the Genus

Species, their serotypes, strains and isolates

00.077.0.03.002.	Grapevine fleck virus
00.077.0.03.002.00.001.	Grapevine fleck virus	[AJ309022]	(GFkV)

Tentative Species in the Genus

00.077.0.83.003.	Grapevine red globe virus
00.077.0.83.003.00.001.	Grapevine red globe virus, AA42	[AJ249361]	(GRGV)
00.077.0.83.003.00.001.	Grapevine red globe virus	[AF521977]	(GRGV)

Unassigned Species in the Family

List of Unassigned Species in the Family

Species, their serotypes, strains and isolates

00.077.0.00.024.	Poinsettia mosaic virus
00.077.0.00.024.00.001.	Poinsettia mosaic virus	[AJ271595]	(PnMV)

Similarity with other Taxa

Replication-associated proteins (RdRp, Mtr, and Hel) contain signature sequences homologous to those of other taxa of the "alpha-like" supergroup of ssRNA viruses, especially those of the genera Carlavirus and Potexvirus.

Derivation of Names

Macula: from macula, Latin for fleck. Marafi: sigla from maize rayado fino virus, Tymo: sigla from turnip yellow mosaic virus,

References

Collated from VIIIth ICTV Report

Contributed by

Dreher, T.W., Edwards, M.C., Gibbs, A.J., Haenni, A.-L., Hammond, R.W., Jupin, I., Koenig, R., Sabanadzovic, S., Abou Ghanem-Sabanadzovic, N. and Martelli, G.P.

Cite this publication as: Index of Viruses - Tymoviridae (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:

Google Analytics: activity view