Marseillevirus
| Marseillevirus | |
|---|---|
Virus classification  | |
| (unranked): | Virus |
| Realm: | Varidnaviria |
| Kingdom: | Bamfordvirae |
| Phylum: | Nucleocytoviricota |
| Class: | Megaviricetes |
| Order: | Pimascovirales |
| Family: | Marseilleviridae |
| Genus: | Marseillevirus |
Marseillevirus is a genus of viruses, in the family Marseilleviridae. There are two species in this genus.[1][2] It is the prototype of a family of nucleocytoplasmic large DNA viruses (NCLDV) of eukaryotes (commonly known as Giant Viruses). It was isolated from amoeba.[3]
Taxonomy
[edit]The genus contains the following species:[2]
History
[edit]Structure
[edit]Viruses in Marseillevirus have icosahedral geometries. The diameter is around 250 nm. The genome has 457 open reading frames and is circular.[1] The genome has a length of 368 kb,[1] with a G+C content of 44.73%. It encodes a minimum of 49 proteins.[3]
The genome of the virus includes typical NCLDV core genes and genes apparently obtained from eukaryotic hosts and their parasites or symbionts, both bacterial and viral, through probably horizontal gene transfer mechanism.[3]
| Genus | Structure | Symmetry | Capsid | Genomic arrangement | Genomic segmentation |
|---|---|---|---|---|---|
| Marseillevirus | Icosahedral | Circular |
Life cycle
[edit]Viral replication is nucleo-cytoplasmic. DNA-templated transcription is the method of transcription. Amoeba serve as the natural host.[1]
| Genus | Host details | Tissue tropism | Entry details | Release details | Replication site | Assembly site | Transmission |
|---|---|---|---|---|---|---|---|
| Marseillevirus | Amoeba | None | Fusion | Lysis | Cytoplasm | Cytoplasm | Diffusion in Water |
See also
[edit]Other giant viruses:
References
[edit]- 1 2 3 4 "Viral Zone". ExPASy. Retrieved 12 August 2015.
- 1 2 "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 22 May 2021.
- 1 2 3 Boyer, Mickaël; Yutin, Natalya; Pagnier, Isabelle; Barrassi, Lina; Fournous, Ghislain; Espinosa, Leon; Robert, Catherine; Azza, Saïd; Sun, Siyang; Rossmann, Michael G.; Suzan-Monti, Marie; La Scola, Bernard; Koonin, Eugene V.; Raoult, Didier (2009). "Giant Marseillevirus highlights the role of amoebae as a melting pot in emergence of chimeric microorganisms". Proc. Natl. Acad. Sci. U.S.A. 106 (51): 21848–53. Bibcode:2009PNAS..10621848B. doi:10.1073/pnas.0911354106. PMC 2799887. PMID 20007369.
- ↑ Raoult D, La Scola B, Pagnier I, Greub G, Colson P (June 2013). "Marseilleviridae, a new family of giant viruses that infect Acanthamoeba spp" (PDF). International Committee on Taxonomy of Viruses. Retrieved 6 May 2025.