Aspiviridae
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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. Aspiviridae is also the only family in the order Serpentovirales, which in turn is the only order in the class Milneviricetes.[2]
History
The name Aspiviridae derives from the Latin Script error: No such module "Lang". (snake or viper), referring to the shape, along with the suffix for a virus family -viridae.[3] Ophiovirus derives from the Ancient Greek ophis, "snake", with –virus the suffix for a virus genus.[4] Likewise, Serpentovirales is from "serpent" with -virales the suffix for a virus order.[3] Milneviricetes is in honor of Robert G. Milne, the last author on the first paper describing ophioviruses.[3][5]
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.[2]
Genome
Member viruses have segmented, negative-sense, single-stranded RNA genomes. The entire genome is 11000–12000 nucleotides long.[2][6]
Taxonomy
The family has one genus, Ophiovirus, which has eight recognized species. Members of both the family and the genus are referred to as ophioviruses.[2] Ophiovirus contains the following species, listed by scientific name and followed by the exemplar virus of the species:[7]
- Ophiovirus capsici, Pepper chlorosis associated virus
- Ophiovirus citri, Citrus psorosis virus
- Ophiovirus freesiae, Freesia sneak virus
- Ophiovirus lactucae, Lettuce ring necrosis virus
- Ophiovirus mirafioriense, Mirafiori lettuce big-vein virus
- Ophiovirus ranunculi, Ranunculus white mottle virus
- Ophiovirus tulipae, Tulip mild mottle mosaic virus
- Ophiovirus vaccinii, Blueberry mosaic associated virus
References
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- ↑ 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.
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