Betanecrovirus

Betanecrovirus is a genus of viruses, in the family Tombusviridae. Plants serve as natural hosts. There are currently three species in this genus, including the type species Tobacco necrosis virus D.[1][2]

Betanecrovirus
Virus classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Tolucaviricetes
Order: Tolivirales
Family: Tombusviridae
Subfamily: Procedovirinae
Genus: Betanecrovirus
Type species
Tobacco necrosis virus D

Taxonomy

Group: ssRNA(+)

[2]

Structure

Viruses in Betanecrovirus are non-enveloped, with icosahedral and spherical geometries, and T=3 symmetry. The diameter is around 28 nm in diameter. Genomes are linear, around 4kb in length.[1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
BetanecrovirusIcosahedralT=3Non-envelopedLinearMonopartite

Life cycle

Viral replication is cytoplasmic. 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, using the premature termination model of subgenomic RNA transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement. Plants serve as the natural host. Transmission routes are mechanical, seed borne, and contact.[1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
BetanecrovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical: contact; seed

References
  1. "Viral Zone". ExPASy. Retrieved 13 August 2015.
  2. ICTV. "Virus Taxonomy: 2014 Release". Retrieved 13 August 2015.
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