Cressdnaviricota

Cressdnaviricota is a phylum of viruses with small, circular single-stranded DNA genomes and encoding rolling circle replication-initiation proteins with the N-terminal HUH endonuclease and C-terminal superfamily 3 helicase domains.[1][2] While the replication-associated proteins are homologous among viruses within the phylum, the capsid proteins are very diverse and have presumably been acquired from RNA viruses on multiple independent occasions. [3][4][5][6] Nevertheless, all cressdnaviruses for which structural information is available appear to contain the jelly-roll fold. [5][6]

Cressdnaviricota
Virions of Maize streak virus
Virus classification Edit this classification
(unranked): Virus
Realm: Monodnaviria
Kingdom: Shotokuvirae
Phylum: Cressdnaviricota
Classes

See text

Taxonomy

The following classes are recognized:

References
  1. Krupovic, M; Varsani, A; Kazlauskas, D; Breitbart, M; Delwart, E; Rosario, K; Yutin, N; Wolf, YI; Harrach, B; Zerbini, FM; Dolja, VV; Kuhn, JH; Koonin, EV (2020). "Cressdnaviricota: a Virus Phylum Unifying Seven Families of Rep-Encoding Viruses with Single-Stranded, Circular DNA Genomes". Journal of Virology. 94 (12): e00582-20. doi:10.1128/JVI.00582-20. PMC 7307096. PMID 32269128.
  2. "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. Retrieved 25 April 2020.
  3. Kazlauskas, Darius; Dayaram, Anisha; Kraberger, Simona; Goldstien, Sharyn; Varsani, Arvind; Krupovic, Mart (April 2017). "Evolutionary history of ssDNA bacilladnaviruses features horizontal acquisition of the capsid gene from ssRNA nodaviruses". Virology. 504: 114–121. doi:10.1016/j.virol.2017.02.001.
  4. Tisza, Michael J; Pastrana, Diana V; Welch, Nicole L; Stewart, Brittany; Peretti, Alberto; Starrett, Gabriel J; Pang, Yuk-Ying S; Krishnamurthy, Siddharth R; Pesavento, Patricia A; McDermott, David H; Murphy, Philip M; Whited, Jessica L; Miller, Bess; Brenchley, Jason; Rosshart, Stephan P; Rehermann, Barbara; Doorbar, John; Ta'ala, Blake A; Pletnikova, Olga; Troncoso, Juan C; Resnick, Susan M; Bolduc, Ben; Sullivan, Matthew B; Varsani, Arvind; Segall, Anca M; Buck, Christopher B (4 February 2020). "Discovery of several thousand highly diverse circular DNA viruses". eLife. 9: e51971. doi:10.7554/eLife.51971. PMC 7000223.
  5. Krupovic, Mart (October 2013). "Networks of evolutionary interactions underlying the polyphyletic origin of ssDNA viruses". Current Opinion in Virology. 3 (5): 578–586. doi:10.1016/j.coviro.2013.06.010.
  6. Munke, Anna; Kimura, Kei; Tomaru, Yuji; Wang, Han; Yoshida, Kazuhiro; Mito, Seiya; Hongo, Yuki; Okamoto, Kenta (30 August 2022). "Primordial Capsid and Spooled ssDNA Genome Structures Unravel Ancestral Events of Eukaryotic Viruses". mBio. 13 (4): e00156–22. doi:10.1128/mbio.00156-22.


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