Tymovirus

Tymovirus is a genus of viruses in the order Tymovirales, in the family Tymoviridae. Plants serve as natural hosts. There are 28 species in this genus.

Taxonomy
The genus contains the following species:


 * 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
 * Tomato blistering mosaic tymovirus
 * Turnip yellow mosaic virus
 * Voandzeia necrotic mosaic virus
 * Wild cucumber mosaic virus

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.

Life cycle
Viral replication is cytoplasmic and 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.