Aspiviridae Explained

Aspiviridae, formerly Ophioviridae, is a family of segmented negative-strand RNA viruses which infect plants. Member viruses are characterized by an elongated and highly filamentous and flexible nucleocapsid with helical symmetry.^[1] It is a monotypic taxon containing only one genus, Ophiovirus.^[2] Aspiviridae is also the only family in the order Serpentovirales, which in turn is the only order in the class Milneviricetes.^[3]

History

The name Aspiviridae derives from the Latin Latin: aspis (snake or viper), referring to the shape, along with the suffix for a virus family -viridae.^[4] Ophiovirus derives from the Ancient Greek ophis, "snake", with –virus the suffix for a virus genus.^[5] Likewise, Serpentovirales is from "serpent" with -virales the suffix for a virus order. Milneviricetes is in honor of Robert G. Milne, the last author on the first paper describing ophioviruses.^[6]

Virology

Structure

The protein capsid is non-enveloped and has a constant diameter of 1500–2500 nm and a width of 3 nm, or 9 nm. The capsids form kinked circles, which can collapse to form linear duplex structures, much like a spring.^[3]

Genome

Member viruses have segmented, negative-sense, single-stranded RNA genomes. The entire genome is 11000–12000 nucleotides long.^{[3] [7]}

Taxonomy

The family has one genus, Ophiovirus, which has seven recognized species. Members of both the family and the genus are referred to as ophioviruses.^[3]

• Family: Aspiviridae
  • Genus: Ophiovirus
    • Species: (Past name; New name)
      • Blueberry mosaic associated ophiovirus

Ophiovirus vaccinii

• • • • Citrus psorosis ophiovirus

Ophiovirus citri

• • • • Freesia sneak ophiovirus

Ophiovirus freesiae

• • • • Lettuce ring necrosis ophiovirus

Ophiovirus lactucae

• • • • Mirafiori lettuce big-vein ophiovirus

Ophiovirus mirafioriense

• • • • Ranunculus white mottle ophiovirus

Ophiovirus ranunculi

• • • • Tulip mild mottle mosaic ophiovirus

Ophiovirus tulipae

External links

• ICTV Online Report Ophioviridae
• Viralzone: Ophioviridae

Notes and References

1. García. María Laura. Bó. Elena Dal. da Graça. John V.. Gago-Zachert. Selma. Hammond. John. Moreno. Pedro. Natsuaki. Tomohide. Pallás. Vicente. Navarro. Jose A.. Reyes. Carina A.. Luna. Gabriel Robles. Sasaya. Takahide. Tzanetakis. Ioannis E.. Vaira. Anna María. Verbeek. Martin. ICTV Virus Taxonomy Profile: Ophioviridae. Journal of General Virology. 98. 6. 1161–1162. 21 June 2017. 10.1099/jgv.0.000836. 28635587. 5656789.
2. Web site: Virus Taxonomy: 2018 Release . International Committee on Taxonomy of Viruses (ICTV) . 14 January 2019 . en .
3. Web site: ICTV Report Ophioviridae.
4. Web site: Wolf . Yuri . Krupovic . Mart . Zhang . Yong Zhen . Zhang Yongzhen . Maes . Piet . Dolja . Valerian . Koonin . Eugene V. . Kuhn . Jens H. . Megataxonomy of negative-sense RNA viruses . International Committee on Taxonomy of Viruses (ICTV) . 12 January 2019 . en . docx.
5. Web site: Aspiviridae – Aspiviridae – Negative-sense RNA Viruses - ICTV. 2020-12-09. talk.ictvonline.org. en.
6. García . Maria Laura . Dal Bó . Elena . Grau . Oscar . Milne . Robert G. . The closely related citrus ringspot and citrus psorosis viruses have particles of novel filamentous morphology . Journal of General Virology . 1 December 1994 . 75 . 12 . 3585–3590 . 10.1099/0022-1317-75-12-3585 . 7996151 . en . 0022-1317 . 107178738. free .
7. ICTVdB Management (2006). 00.094.0.01. Ophiovirus. In: ICTVdB—The Universal Virus Database, version 4. Büchen-Osmond, C. (Ed), Columbia University, New York, USA.