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| taxon = Bacilladnaviridae |
| taxon = Bacilladnaviridae |
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'''''Bacilladnaviridae''''' is a family of [[virus]]es.<ref>{{cite web|url=https://talk.ictvonline.org/taxonomy/|title=Virus Taxonomy: 2019 Release|last=|first=|date=|website=talk.ictvonline.org|publisher=International Committee on Taxonomy of Viruses|access-date=25 April 2020|quote=}}</ref> |
'''''Bacilladnaviridae''''' is a family of [[DNA_virus#Group_II:_ssDNA_viruses|single-stranded DNA virus]]es that primarily infect [[diatom]]s.<ref>{{cite web|url=https://talk.ictvonline.org/taxonomy/|title=Virus Taxonomy: 2019 Release|last=|first=|date=|website=talk.ictvonline.org|publisher=International Committee on Taxonomy of Viruses|access-date=25 April 2020|quote=}}</ref><ref name=Tomaru2008 >{{cite journal|pmc=3147440|year=2011|author1=Tomaru|first1=Y|title=Isolation and Characterization of a Single-Stranded DNA Virus Infecting Chaetoceros lorenzianus Grunow|journal=Applied and Environmental Microbiology|volume=77|issue=15|pages=5285–5293|last2=Takao|first2=Y|last3=Suzuki|first3=H|last4=Nagumo|first4=T|last5=Koike|first5=K|last6=Nagasaki|first6=K|doi=10.1128/AEM.00202-11|pmid=21666026}}</ref> |
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==Characteristics== |
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The genome of these viruses appears to be unique. It consists of a single molecule of covalently closed circular single stranded DNA of 4.5-6 kilobases as well as a segment of linear ssDNA of ~1 kilobase. The linear segment is complementary to a portion of the closed circle creating a partially double stranded region. There are at least three major open reading frames in the genome. |
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Similar to other eukaryotic ssDNA viruses, bacilladnaviruses are likely to replicate their genomes by the rolling-circle mechanism, initiated by the virus-encoded endonuclease (Rep). However, the latter protein of bacilladnaviruses displays unique conserved motifs and in phylogenetic trees forms a monophyletic clade separated from other groups of ssDNA viruses. The capsid protein of bacilladnaviruses has the [[jelly-roll fold]] and is most closely related to the corresponding proteins from members of the family ''[[Nodaviridae]]'', which have ssRNA genomes.<ref name=Bacilladna >{{cite journal|last1=Kazlauskas|first1=D|last2=Dayaram|first2=A|last3=Kraberger|first3=S|last4=Goldstien|first4=S|last5=Varsani|first5=A|last6=Krupovic|first6=M|title=Evolutionary history of ssDNA bacilladnaviruses features horizontal acquisition of the capsid gene from ssRNA nodaviruses.|journal=Virology|date=2017|volume=504|pages=114–121|doi=10.1016/j.virol.2017.02.001|pmid=28189969|doi-access=free}}</ref> |
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The virions are about 34 nanometers (nm) in diameter and accumulate in the nucleus. Mature virions are released by lysis of the host cell. |
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==Taxonomy== |
==Taxonomy== |
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The following genera are recognized: |
The following genera are recognized: |
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*''[[Diatodnavirus]]'' |
*''[[Diatodnavirus]]'', one species; type species: ''[[Chaetoceros diatodnavirus 1]]'' |
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*''[[Kieseladnavirus]]'' |
*''[[Kieseladnavirus]]'', one species; type species: ''[[Avon-Heathcote Estuary associated kieseladnavirus]]'' |
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*''[[Protobacilladnavirus]]'' |
*''[[Protobacilladnavirus]]'', 7 species; type species: ''[[Chaetoceros protobacilladnavirus 1]]'' |
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==References== |
==References== |
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[[Category:Virus families]] |
[[Category:Virus families]] |
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[[Category:Biology]] |
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[[Category:Virus subfamilies]] |
[[Category:Virus subfamilies]] |
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{{Virus-stub}} |
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| Bacilladnaviridae | |
|---|---|
Virus classification 
| |
| (unranked): | Virus |
| Realm: | Monodnaviria |
| Kingdom: | Shotokuvirae |
| Phylum: | Cressdnaviricota |
| Class: | Arfiviricetes |
| Order: | Baphyvirales |
| Family: | Bacilladnaviridae |
Bacilladnaviridae is a family of single-stranded DNA viruses that primarily infect diatoms.[1][2]
The genome of these viruses appears to be unique. It consists of a single molecule of covalently closed circular single stranded DNA of 4.5-6 kilobases as well as a segment of linear ssDNA of ~1 kilobase. The linear segment is complementary to a portion of the closed circle creating a partially double stranded region. There are at least three major open reading frames in the genome.
Similar to other eukaryotic ssDNA viruses, bacilladnaviruses are likely to replicate their genomes by the rolling-circle mechanism, initiated by the virus-encoded endonuclease (Rep). However, the latter protein of bacilladnaviruses displays unique conserved motifs and in phylogenetic trees forms a monophyletic clade separated from other groups of ssDNA viruses. The capsid protein of bacilladnaviruses has the jelly-roll fold and is most closely related to the corresponding proteins from members of the family Nodaviridae, which have ssRNA genomes.[3]
The virions are about 34 nanometers (nm) in diameter and accumulate in the nucleus. Mature virions are released by lysis of the host cell.
The following genera are recognized:
| Bacilladnaviridae |
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|---|---|
