Alphaflexiviridae

Alphaflexiviridae is a family of viruses in the order Tymovirales. Plants and fungi serve as natural hosts. There are currently 51 species in this family, divided among 6 genera. Diseases associated with this family include: mosaic and ringspot symptoms.[1][2]

Alphaflexiviridae
Symptoms of Bamboo mosaic virus on a bamboo leaf
Virus classification
(unranked): Virus
Realm: Riboviria
Phylum: incertae sedis
Order: Tymovirales
Family: Alphaflexiviridae
Genera

Taxonomy

Group: ssRNA(+)

[2]

Structure

Viruses in 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.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
AllexivirusFilamentousNon-envelopedLinearMonopartite
PotexvirusFilamentousNon-envelopedLinearMonopartite
BotrexvirusFilamentousNon-envelopedLinearMonopartite
SclerodarnavirusCapsid-lessNon-envelopedLinearMonopartite
LolavirusFilamentousNon-envelopedLinearMonopartite
MandarivirusFilamentousNon-envelopedLinearMonopartite

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.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
AllexivirusPlants: Shallot; plants: onion; plants: garlicNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMites
PotexvirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmInsects
BotrexvirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown
SclerodarnavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown
LolavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown
MandarivirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown

References

  1. "Viral Zone". ExPASy. Retrieved 12 June 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 12 June 2015.

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