Felixounavirus

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Felixounavirus
Virus classification Red Pencil Icon.png
(unranked): Virus
Realm: Duplodnaviria
Kingdom: Heunggongvirae
Phylum: Uroviricota
Class: Caudoviricetes
Order: Caudovirales
Family: Myoviridae
Subfamily: Ounavirinae
Genus:Felixounavirus

Felixounavirus (synonyms: FelixO1likevirus, and Felixounalikevirus) is a genus of viruses in the order Caudovirales , in the family Myoviridae . Bacteria serve as natural hosts, with transmission achieved through passive diffusion. There are currently 16 species in this genus, including the type species Salmonella virus FelixO1 . [1] [2] [3]

Contents

Taxonomy

The following species are recognized: [2]

Structure

Viruses in Felixounavirus are non-enveloped, with head-tail geometries. The diameter is around 73 nm. The tail is around 17  nm wide, 113 nm long, with six long straight terminal fibers and a baseplate. The tail sheath presents a criss-cross pattern with no transverse striations. Genomes are linear, around 86kb in length. The genome codes for 131 proteins. [1]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
FelixounavirusHead-TailNon-envelopedLinearMonopartite

Genome

All three species have been fully sequenced and are available from ICTV, including two strains of Erwinia phage phiEa21-4. They range between 84k and 89k nucleotides, with 118 to 140 proteins. The complete genomes are available from here. [3]

Life cycle

The virus attaches to the host cell using its terminal fibers, and ejects the viral DNA into the host cytoplasm via contraction of its tail sheath. Viral replication is cytoplasmic. DNA-templated transcription is the method of transcription. Once the viral genes have been replicated, the procapsid is assembled and packed. The tail is then assembled and the mature virions are released via lysis. [1]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
FelixounavirusBacteriaNoneInjectionLysisCytoplasmCytoplasmPassive diffusion

History

According to the ICTV's 2010–11 report, the genus FelixO1likevirus was first accepted as a new genus, at the same time as all three of its contained species . The following year (2012), the name was changed to Felixounalikevirus. This proposal is available here. [2] The genus was later renamed to Felixounavirus.

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References

  1. 1 2 3 "Viral Zone". ExPASy. Retrieved 1 July 2015.
  2. 1 2 3 "Virus Taxonomy: 2019 Release". talk.ictvonline.org. International Committee on Taxonomy of Viruses. Retrieved 2 May 2020.
  3. 1 2 NCBI. "Felixounalikevirus Complete Genomes" . Retrieved 17 February 2015.

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