View source for Biology:Rhizidiovirus

{{Short description|Genus of viruses}}
{{Virusbox
| image = F31-01-9780123846846-Rhizidiovirus.png
| image_caption = ''Rhizidiomyces virus''
| taxon = Rhizidiovirus
| subdivision = 
* Rhizidiomyces virus <small>ICTV 1987</small>
| synonyms =
Rhizidiomyces virus
* RV <small>Virus name abbr.</small>
}}

'''''Rhizidiovirus''''' is a genus of viruses. [[Biology:Stramenopile|Stramenopile]]s<ref>Dawe VH, Kuhn CW (1983) Isolation and characterization of a double-stranded DNA mycovirus infecting the aquatic fungus, ''Rhizidiomyces''. Virology 130(1):21–28</ref> (specifically Hyphochytridiomycota) serve as natural hosts. There is only one species in this genus: '''''Rhizidiomyces virus'''''.<ref name=ViralZone>{{cite web|title=Viral Zone|url=http://viralzone.expasy.org/all_by_species/640.html|publisher=ExPASy|access-date=15 June 2015}}</ref><ref name="ICTV"> {{cite web |title=Virus Taxonomy: 2022 Release |url=https://ictv.global/taxonomy |website=International Committee on Taxonomy of Viruses (ICTV) |access-date=18 August 2023 |language=en |date=March 2023}} </ref>

==Structure==
[[File:Rhizidiovirus virion.jpg|thumb|left|upright=1.25|Schematic drawing of a ''Rhizidiovirus'' particle]]
Viruses in ''Rhizidiovirus'' are non-enveloped, with icosahedral, round, and  isometric geometries. The diameter is around 60&nbsp;nm.<ref name=ViralZone />

The genome is non segmented, linear double stranded DNA (dsDNA) and ~25.5 kilobases in length. It has a [[Chemistry:Guanine|guanine]] + [[Chemistry:Cytosine|cytosine]] content of 42%. It encodes at least 14 protein with molecular weights between 84.5 and 26 kilo[[Dalton (unit)|dalton]]s.{{cn|date=November 2022}}
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{| class="wikitable sortable" style="text-align:center"
|-
! Genus !! Structure || Symmetry !! Capsid !! Genomic arrangement !! Genomic segmentation
|-
|''Rhizidiovirus''||Icosahedral||||Non-enveloped||Linear||Monopartite
|}

==Life cycle==
The virus seems to remain latent within the host until the host is stressed.<ref name=Dawe1983>Dawe VH, Kuhn CW (1983) Virus-like particles in the aquatic fungus, ''Rhizidiomyces''. Virology 130(1):10–20.</ref> Virons first appear in the [[Biology:Cell nucleus|nucleus]]. This is followed by the disintegration of the host nucleus and [[Biology:Cytoplasm|cytoplasm]] and their replacement by paracrystalline structures composed of virons. These structures first appear in association with the mitochondria. After the nucleus and cytoplasm have been replaced the cell wall breaks down followed with release of virons into the medium. Vertical transmission also appears to be possible.{{cn|date=November 2022}}

DNA-templated transcription is the method of transcription. Fungi and hyphochytridiomycota serve as the natural host.<ref name=ViralZone />

{| class="wikitable sortable" style="text-align:center"
|-
! Genus !! Host details !! Tissue tropism !! Entry details !! Release details !! Replication site !! Assembly site !! Transmission
|-
|''Rhizidiovirus''||Fungi Hyphochytridiomycota||None||Unknown||Lysis||Nucleus||Nucleus||Passive Diffusion, Vertical
|}

==References==
{{Reflist}}

==External links==
* [http://viralzone.expasy.org/all_by_species/640.html '''Viralzone''': Rhizidiovirus]
* [http://ictvonline.org/virusTaxonomy.asp '''ICTV''']
{{Baltimore classification}}

{{Taxonbar|from1=Q7320734|from2=Q18976667}}

[[Category:Double-stranded DNA viruses]]
[[Category:Virus genera]]

{{Sourceattribution|Rhizidiovirus}}