Nanovirus

Nanovirus is a genus of viruses, in the family Nanoviridae.[1] Legume plants serve as natural hosts. There are currently eight species in this genus including the type species Subterranean clover stunt virus. Diseases associated with this genus include: stunting, severe necrosis and early plant death.[1][2]

Nanovirus
Virus classification
(unranked): Virus
Realm: Monodnaviria
Kingdom: Shotokuvirae
Phylum: Cressdnaviricota
Class: Arfiviricetes
Order: Mulpavirales
Family: Nanoviridae
Genus: Nanovirus
Type species
Subterranean clover stunt virus

Taxonomy

Group: ssDNA

[1]

Structure

Viruses in the genus Nanovirus are non-enveloped, with icosahedral and round geometries, and T=1 symmetry. The diameter is around 18-19 nm. The genome is multipartite, and the genome components (6 or 8, depending on the genera) are circular, around 1kb in length, essentially carry only one gene, and are individually encapsidated forming small icosahedral virions (18–20 nm).[2][3]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
NanovirusIcosahedralT=1Non-envelopedCircularSegmented

Life cycle

Viral replication is nuclear. Entry into the host cell is achieved by penetration into the host cell. Replication follows the ssDNA rolling circle model. DNA-templated transcription is the method of transcription. The virus exits the host cell by nuclear pore export, and tubule-guided viral movement. Legume plants serve as the natural host. The virus is transmitted via a vector (the virus does not replicate in this). Transmission routes are vector.<ref name=ICTVReport>[2]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
NanovirusPlants: legumesPhloemViral movement; mechanical inoculationSecretion; viral movementNucleusNucleusAphids

References
  1. "ICTV Report Nanoviridae".
  2. "Viral Zone". ExPASy. Retrieved 15 June 2015.
  3. Grigoras, Ioana (May 2014). "Genome diversity and evidence of recombination and reassortment in nanoviruses from Europe". Journal of General Virology. 95: 1178–1191. doi:10.1099/vir.0.063115-0. PMID 24515973.
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