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Tymovirus is a genus of viruses in the order Tymovirales, in the family Tymoviridae. Plants serve as natural hosts. There are currently 27 species in this genus including the type species Turnip yellow mosaic virus.^[1]^[2]

Taxonomy

Group: ssRNA(+)

Order: Tymovirales

Family: Tymoviridae
- Genus: Tymovirus
  Anagyris vein yellowing virus
  
  Andean potato latent virus
  
  Andean potato mild mosaic virus
  
  Belladonna mottle virus
  
  Cacao yellow mosaic virus
  
  Calopogonium yellow vein virus
  
  Chayote mosaic virus
  
  Chiltepin yellow mosaic virus
  
  Clitoria yellow vein virus
  
  Desmodium yellow mottle virus
  
  Dulcamara mottle virus
  
  Eggplant mosaic virus
  
  Erysimum latent virus
  
  Kennedya yellow mosaic virus
  
  Melon rugose mosaic virus
  
  Nemesia ring necrosis virus
  
  Okra mosaic virus
  
  Ononis yellow mosaic virus
  
  Passion fruit yellow mosaic virus
  
  Peanut yellow mosaic virus
  
  Petunia vein banding virus
  
  Physalis mottle virus
  
  Plantago mottle virus
  
  Scrophularia mottle virus
  
  Turnip yellow mosaic virus
  
  Voandzeia necrotic mosaic virus
  
  Wild cucumber mosaic virus

^[2]

Structure

Viruses in Tymovirus are non-enveloped, with icosahedral and isometric geometries, and T=3 symmetry. The diameter is around 30 nm. Genomes are linear, around 6.3kb in length.^[1]

Genus	Structure	Symmetry	Capsid	Genomic Arrangement	Genomic Segmentation
Tymovirus	Icosahedral	T=3	Non-Enveloped	Linear	Monopartite

Life Cycle

Viral replication is cytoplasmic, and is lysogenic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. Translation takes place by leaky scanning. The virus exits the host cell by monopartite non-tubule guided viral movement. Plants serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.^[1]

Genus	Host Details	Tissue Tropism	Entry Details	Release Details	Replication Site	Assembly Site	Transmission
Tymovirus	Plants	None	Viral movement; mechanical inoculation	Viral movement	Cytoplasm	Cytoplasm	Mechanical: beetles; sap

References

^ ^a ^b ^c "Viral Zone". ExPASy. Retrieved 15 June 2015.
^ ^a ^b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 15 June 2015.

External Links

Viralzone: Tymovirus
ICTV

English Journal

A distinct tymovirus infecting Cassia hoffmannseggii in Brazil.

Nicolini C, Pio-Ribeiro G, Andrade GP, Melo FL, Oliveira VC, Guimarães FC, Resende RO, Kitajima EW, Rezende JA, Nagata T.SourceLaboratório de Fitovirologia, Departamento de Agronomia, Universidade Federal Rural de Pernambuco, Recife, PE, 52171-900, Brazil.
Virus genes.Virus Genes.2012 Apr 25. [Epub ahead of print]
Leaves of Cassia hoffmannseggii, a wild fabaceous species found in the Atlantic Forest, with a severe mosaic symptom were collected in Pernambuco State, Brazil. By transmission electron microscopy, two types of virus particles were found: the first was recognized as particles of a potyvirus, which w
PMID 22528644

Poly(A)-binding protein increases the binding affinity and kinetic rates of interaction of viral protein linked to genome with translation initiation factors eIFiso4F and eIFiso4F·4B complex.

Khan MA, Goss DJ.SourceDepartment of Chemistry and Biochemistry, Hunter College of City University of New York, New York, New York 10065, United States.
Biochemistry.Biochemistry.2012 Feb 21;51(7):1388-95. Epub 2012 Feb 9.
VPg of turnip mosaic virus (TuMV) was previously shown to interact with translation initiation factor eIFiso4F and play an important role in mRNA translation [Khan, M. A., et al. (2008) J. Biol. Chem.283, 1340-1349]. VPg competed with cap analogue for eIFiso4F binding and competitively inhibited cap
PMID 22299678

Japanese Journal

An improved protocol for the preparation of protoplasts from an established Arabidopsis thaliana cell suspension culture and infection with RNA of turnip yellow mosaic tymovirus : a simple and reliable method

SCHIRAWSKI J.
J. Virol. Methods 86, 85-94, 2000
NAID 80011524760

Potato virus T RNA の3'末端領域の塩基配列

越知資泰,柏崎哲,平塚和之,難波成任,土崎常男
日本植物病理學會報 58(3), 416-425, 1992-07-25
Capillovirusグループのpotato virus T (PVT) RNAの3'末端の2,392塩基の配列を決定した。本配列は5'末端側より互いに末端の重複したORFl(少なくとも248アミノ酸(29K)以上), ORF2(358アミノ酸:40K),およびORF3(213アミノ酸:24K)をコードし, 3'末端には188塩基よりなる非翻訳領域とpoly(A)が認められた。29Kタンパク質は …
NAID 110002735640