Endornaviridae
Family of viruses
From Wikipedia, the free encyclopedia
Endornaviridae is a family of viruses. Plants, fungi, and oomycetes serve as natural hosts. There are 31 species in this family, assigned to 2 genera (Alphaendornavirus and Betaendornavirus). Members of Alphaendornavirus infect plants, fungi and the oomycete Phytophthora sp., members of Betaendornavirus infect ascomycete fungi.[1][2][3][4]
| Endornaviridae | |
|---|---|
 | |
| Endornaviridae particle. Shown is the replicative form (dsRNA) of the (+)ssRNA virus. | |
Virus classification  | |
| (unranked): | Virus |
| Realm: | Riboviria |
| Kingdom: | Orthornavirae |
| Phylum: | Kitrinoviricota |
| Class: | Alsuviricetes |
| Order: | Martellivirales |
| Family: | Endornaviridae |
| Genera | |
|
Alphaendornavirus | |
Taxonomy
The following genera are assigned to the family:[1]
- Alphaendornavirus
- Betaendornavirus
Structure
Linear, single-stranded, positive-sense RNA genome of about 14 kb to 17.6 kb. A site specific break (nick) is found in the coding strand about 1 to 2 kb from the 5’ terminus. ViralZone conflicts with ICTV, listing Endornaviridae as dsRNA viruses.[1][2]
As the Endornaviridae genomes don't include a coat protein (CP) gene, no true virions are associated with members of this family. For Vicia faba endornavirus, the RNA genome has been associated with some pleomorphic cytoplasmic membrane vesicles.[1]
Life cycle
Viral replication is cytoplasmic. The viral replicative form of the Endornaviridae is dsRNA. Replication follows the double-stranded RNA virus replication model. Double-stranded RNA virus transcription is the method of transcription.[2][1]
As the replicative dsRNA form is relatively stable, it can be found in comparatively high quantities in host tissues, and therefore is a likely subject of isolations[1] (this is the reason why Endornaviridae often are classified as dsRNA viruses,[2] in contrast to the official ssRNA(+) ICTV classification).
The virus exits the host cell by cell to cell movement.[1][2]
Plants, fungi, and oomycetes serve as the natural hosts. Transmission routes are pollen associated.[1][2]