Cilevirus
{{Short description|Genus of viruses}}
{{Use dmy dates|date=March 2025}}
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Cilevirus is a genus of viruses in the family Kitaviridae. Plants serve as natural hosts. The genus contains eight species.{{cite web|title=Virus Taxonomy: 2024 Release|url=https://ictv.global/taxonomy|publisher=International Committee on Taxonomy of Viruses|access-date=5 April 2025}}
Structure
Viruses in Cilevirus are non-enveloped, with bacilliform geometries. These viruses are about 50 nm wide and 150 nm long. Genomes are linear and segmented, bipartite, around 28.75kb in length.{{cite web|title=Viral Zone|url=http://viralzone.expasy.org/all_by_species/735.html|publisher=ExPASy|accessdate=15 June 2015}} The genome is bipartite with two segments of 8745 nucleotide (RNA 1) and 4986 nucleotides (RNA 2) in length. The 5' terminals of both segments have a cap structure and have poly adenosine tails in their 3'-terminals. RNA 1 contains two open reading frames (ORFs) which encode 286 and 29 kilodalton (kDa) proteins. The 286 kDa protein is a polyprotein involved in virus replication and has four conserved domains: methyltransferase, protease, helicase and an RNA dependent RNA polymerase. RNA 2 encodes four ORFs which correspond to 15, 61, 32 and 24 kDa proteins. The 32 kDa protein is involved in cell to cell movement of the virus but the functions of the other proteins are unknown.
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| Genus | Structure || Symmetry | Capsid | Genomic arrangement | Genomic segmentation | |
|---|---|---|---|---|---|
| Cilevirus | Bacilliform | Non-enveloped | Linear | Bipartite |
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 is the method of transcription. The virus exits the host cell by tubule-guided viral movement.
Plants serve as the natural host. The virus is transmitted via a vector (mites of the genus brevipalpus). Transmission routes are vector.
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| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
|---|---|---|---|---|---|---|---|
| Cilevirus | Plants | None | Penetration | Viral Movement | Cytoplasm | Cytoplasm | Vector |
Taxonomy
The genus contains the following species, listed by scientific name and followed by the exemplar virus of the species:
- Cilevirus australis, Ligustrum leprosis virus
- Cilevirus colombiaense, Citrus leprosis virus C2
- Cilevirus leprosis, Citrus leprosis virus C
- Cilevirus ligustri, Ligustrum chlorotic spot virus
- Cilevirus oahuense, Hibiscus yellow blotch virus
- Cilevirus passiflorae, Passion fruit green spot virus
- Cilevirus pistaciae, Pistachio virus Y
- Cilevirus solani, Solanun violifolium ringspot virus
History
This genus was created in 2006 by Locali-Fabris et al in 2006.Locali-Fabris EC, Freitas-Astúa J, Souza AA, Takita MA, Astúa-Monge G, Antonioli-Luizon R, Rodrigues V, Targon ML, Machado MA (2006) Complete nucleotide sequence, genomic organization and phylogenetic analysis of Citrus leprosis virus cytoplasmic type. J Gen Virol 87(9):2721-2729
References
{{Reflist}}
External links
- [http://viralzone.expasy.org/all_by_species/735.html Viralzone: Cilevirus]
- [http://ictvonline.org/virusTaxonomy.asp ICTV]
{{Baltimore classification}}
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