Bacilladnaviridae Explained

Bacilladnaviridae is a family of single-stranded DNA viruses that primarily infect diatoms.^{[1] [2]}

Characteristics

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] [4]}

Taxonomy

The following genera are recognized:^[5]

• Diatodnavirus
• Kieseladnavirus
• Protobacilladnavirus

External links

• Yuji Tomaru, Kensuke Toyoda, Hidekazu Suzuki, Tamotsu Nagumo, Kei Kimura & Yoshitake Takao: New single-stranded DNA virus with a unique genomic structure that infects marine diatom Chaetoceros setoensis. In: Nature Sci Rep 3, 3337. 26 November 2013. . Proposal of new species "Chaetoceros setoensis DNA virus" (CsetDNAV), ssDNA circular.

Notes and References

1. Web site: Virus Taxonomy: 2019 Release. talk.ictvonline.org. International Committee on Taxonomy of Viruses. 25 April 2020.
2. 3147440. 2011. Tomaru. Y. Isolation and Characterization of a Single-Stranded DNA Virus Infecting Chaetoceros lorenzianus Grunow. Applied and Environmental Microbiology. 77. 15. 5285–5293. Takao. Y. Suzuki. H. Nagumo. T. Koike. K. Nagasaki. K. 10.1128/AEM.00202-11. 21666026. 2011ApEnM..77.5285T.
3. Kazlauskas. D. Dayaram. A. Kraberger. S. Goldstein. S. Varsani. A. Krupovic. M. Evolutionary history of ssDNA bacilladnaviruses features horizontal acquisition of the capsid gene from ssRNA nodaviruses.. Virology. 2017. 504. 114–121. 10.1016/j.virol.2017.02.001. 28189969.
4. Munke . A . Kimura . K . Tomaru . Y . Wang . H . Yoshida . K . Mito . S . Hongo . Y . Okamoto . K . Primordial Capsid and Spooled ssDNA Genome Structures Unravel Ancestral Events of Eukaryotic Viruses. . mBio . 20 July 2022 . 13 . 4 . e0015622 . 10.1128/mbio.00156-22 . 35856561. 9426455 .
5. Web site: Virus Taxonomy: 2020 Release . International Committee on Taxonomy of Viruses (ICTV) . March 2021 . 11 May 2021.