Potyviridae

Potyviridae
Systematics
Classification : Viruses Area : Riboviria Empire : Orthornavirae Phylum : Pisuviricota Class : Stelpaviricetes Order : Patatavirales Family : Potyviridae
Taxonomic characteristics
Genome : ss (+) RNA Baltimore : Group 4 Symmetry : helical Cover : no
Scientific name
Potyviridae
Left
NCBI  Taxonomy: 39729 ViralZone ( ExPASy , SIB): 48

The Potyviridae are a family of RNA viruses that make up more than 30% of the known plant viruses . Some representatives are of agricultural importance as pathogens of useful plants . The name is derived from potato virus Y ( Pot ato virus Y ) as the type species of the family from.

properties

Potyviridae have an RNA - genome of positive polarity , which (filamentous) in a rod-shaped capsid is packaged. In the host cell, Potyviridae produce cylindrical inclusion bodies from a protein of around 70 kilodaltons , which are known as pinwheels .

Systematics

Internal system

Due to the homology of the capsid protein, the potyviruses are divided into eight genera , of which only the bymoviruses have a double-stranded genome : The following classification into genera of the Potyviridae follows the requirements of the International Committee on Taxonomy of Viruses (ICTV) as of November 2018 , The type species is given as an example :

• Family Potyviridae

• Genus Bevemovirus , e.g. B. Bellflower veinal mottle virus (BVMoV)
• Genus Bramby virus , e.g. B. Blackberry virus Y (BVY)
• Genus byymovirus , e.g. B. Barley yellow mosaic virus (BaYMV)
• Genus ipomovirus , e.g. B. Sweet potato mild mottle virus (SPMMV)
• Genus Macluravirus , e.g. B. Maclura mosaic virus (MacMV)
• Genus Poacevirus , e.g. B. Triticum mosaic virus (TriMV)
• Genus Potyvirus , e.g. B. Potato Virus Y (officially Potato virus Y , PVY, type species), tulip breaking virus (rarely Lilienscheckungsvirus officially Lily mottle virus , LiMV or LMoV), tulip breaking virus (formally Tulip breaking virus , TBV) , Celery Virus Y , " Cucurbit yellows-associated virus "

• Genus Roymovirus , e.g. B. Rose yellow mosaic virus (RoYMV)
• Genus rymovirus , e.g. B. ryegrass mosaic virus (officially Ryegrass mosaic virus , RGMV)
• Genus tritimovirus , e.g. B. Wheat streak mosaic virus (WSMV)
• Gender undetermined: Spartina mottle virus (SpMV)

The largest group of the Potyviridae is the genus Potyvirus , with more than 100 members. Potyviruses are naturally transmitted by Aphididae (tube aphids) and are 720 to 850 nm in length. Maclura viruses are 650–675 nm long and are also transmitted by Aphididae. The plant viruses of Ipomoviren are whitefly transmitted and are 750-950 nm long. Tritimoviruses and rymoviruses are 680–750 nm long and are transmitted by cotton grass mites. Rymoviruses are closely related to the potyviruses. Bymoviruses produce virus particles (virions) in two different sizes and are transmitted by Polymyxa graminis .

External system

In 2015, Koonin et al assigned the Potyviridae taxonomically (due to their relationship) to one of their postulated supergroups, “Picornavirus-like superfamily”. The members of this proposed supergroup belong to different groups of the Baltimore classification , usually single-stranded RNA viruses of positive polarity ((+) ssRNA, Baltimore group 4), but they are also - like the Birnaviridae - double-stranded representatives (marked with dsRNA, Baltimore Group 3). This suggestion has now been replaced by the ICTV Master Species List # 35 of March 2020. A comparison of the cladograms can be found in Picornavirales §ICTV Master Species List # 35 .

Web links

Commons : Potyviridae  - Collection of images, videos and audio files

• cylindrical inclusions
• Potyviridae. In: ViralZone website . Retrieved December 27, 2013 . 

Individual evidence

1. ↑ ICTV Master Species List 2018b v1 MSL # 34, Feb. 2019
2. ↑ ^{a b c d e} ICTV: ICTV Taxonomy history: Lily mottle virus , EC 51, Berlin, Germany, July 2019; Email ratification March 2020 (MSL # 35)
3. ↑ JL Riechmann, S. Laín, JA García: Highlights and prospects of potyvirus molecular biology. In: The Journal of general virology. Volume 73 (Pt 1), January 1992, pp. 1-16, ISSN  0022-1317 . PMID 1730931 . (Review).
4. ↑ PH Berger et al .: The Positive Sense Single Stranded RNA Viruses . In: CM Fauquet, MA Mayo, J. Maniloff, U. Desselberger, LA Ball (eds.): Virus Taxonomy: Eighth Report of the International Committee on the Taxonomy of Viruses . 1st edition. Elsevier Academic Press, San Diego 2005, ISBN 0-12-249951-4 , pp. 819-841 .
5. ↑ Potyviridae. In: ViralZone website . Retrieved December 27, 2013 . 
6. ↑ ICTV : Master Species List 2018a v1 , MSL (# 33) including all taxa updates since the 2017 release. Fall 2018
7. ↑ SIB: Bymovirus , on: ViralZone
8. ↑ SIB: Potyvirus , on: ViralZone
9. ↑ NCBI: Cucurbit yellows-associated virus (species)
10. ↑ Franz Xaver Schubiger: Raigrasmosaikvirus (RGMV) on: Pflanzenkrankheite.ch
11. ^ Eugene V. Koonin, Valerian V. Dolja, Mart Krupovic: Origins and evolution of viruses of eukaryotes: The ultimate modularity , in: Virology from May 2015; 479-480. 2-25, Epub March 12, 2015, PMC 5898234 (free full text), PMID 25771806
12. ↑ ICTV: ICTV Master Species List 2019.v1 , New MSL including all taxa updates since the 2018b release, March 2020 (MSL # 35)