''Alphaflexiviridae'' is a family of

viruses A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's ...

in the order ''

Tymovirales ''Tymovirales'' is an order of viruses with five families. The group consists of viruses which have positive-sense, single-stranded RNA genomes. Their genetic material is protected by a special coat protein. Description Tymoviruses are mainly ...

''. Plants and fungi serve as natural hosts. There are 65 species in this family, assigned to six genera. Diseases associated with this family include: mosaic and ringspot symptoms.

Taxonomy

The following genera are recognized: *''

Allexivirus ''Allexivirus'' is a genus of viruses in the order ''Tymovirales'', in the family ''Alphaflexiviridae ''Alphaflexiviridae'' is a family of viruses in the order ''Tymovirales ''Tymovirales'' is an order of viruses with five families. The gr ...

'' *''

Botrexvirus ''Botrexvirus'' is a genus of viruses in the order ''Tymovirales'', in the family ''Alphaflexiviridae ''Alphaflexiviridae'' is a family of viruses in the order ''Tymovirales ''Tymovirales'' is an order of viruses with five families. The gr ...

'' *''

Lolavirus ''Lolavirus'' is a genus of viruses in the order ''Tymovirales'', in the family ''Alphaflexiviridae''. Plants, specifically ryegrass ''Lolium'' is a genus of tufted grasses in the bluegrass subfamily (Pooideae). It is often called ryegrass ...

'' *''

Platypuvirus ''Donkey orchid symptomless virus'' (DOSV) was first discovered in Perth, Australia which is located on the Western side of Australia. The Southwest Australian Floristic Region is very biodiverse and secluded with deserts on the east and nor ...

'' *''

Potexvirus ''Potexvirus'' is a genus of pathogenic viruses in the order ''Tymovirales'', in the family ''Alphaflexiviridae''. Plants serve as natural hosts. There are 48 species in this genus, three of which are assigned to a subgenus. Diseases associated ...

'' *''

Sclerodarnavirus ''Sclerodarnavirus'' is a genus of viruses in the order ''Tymovirales'', in the family ''Alphaflexiviridae ''Alphaflexiviridae'' is a family of viruses in the order ''Tymovirales ''Tymovirales'' is an order of viruses with five families. T ...

Structure

Viruses in the genus ''Alphaflexiviridae'' are non-enveloped, with flexuous and filamentous geometries. The diameter is around 12-13 nm. Genomes are linear, around 5.4-9kb in length. The genome codes for 1 to 6 proteins.

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 tripartite non-tubule guided viral movement. Plants and fungi serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.

References

External links

ICTV Report: ''Alphaflexiviridae''

{{Taxonbar, from=Q2839635 Virus families