Autographiviridae

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Autographiviridae
Systematics
Classification : Viruses
Area : Duplodnaviria
Empire : Heunggongvirae
Phylum : Uroviricota
Class : Caudoviricetes
Order : Caudovirales
Family : Autographiviridae
Taxonomic characteristics
Genome : dsDNA linear
Baltimore : Group 1
Scientific name
Autographiviridae
Left
NCBI  Taxonomy: 542835
ViralZone ( ExPASy , SIB): 709

The Autographiviridae (outdated also Autographivirinae , T7 supergroup , English called T7 supergroup ) are a family of viruses in the order Caudovirales - they were earlier there as the subfamily Autographivirinae in the family Podoviridae . Their natural hosts are bacteria . There are currently 40 species in this subfamily, most of which are assigned to one of seven genera.

Research history

Since the 1990s, the term ' T7 supergroup ' has been established for the growing group of bacteriophages of the family Podoviridae related to the coliphage T7 . Salmonella virus SP6 ( a.k.a. Enterobacteriaceae-Phage SP6 ) and Escherichia virus K1-5 ( a.k.a. Enterobacteriaceae-Phage K1-5 ) were the first to be regarded as a broadly related subgroup (today's genus Zindervirus ) of this 'T7 supergroup'. The Pseudomonas virus phiKMV (alias bacteriophage phiKMV ) also showed similarities at the level of genome organization . Based on the available morphological and proteomic data, this virus clade has been established as a subfamily in the Podoviridae family .

etymology

The name of the subfamily Autographivirinae comes from the Greek αὐτο-γράφειν (aúto-gráphein, self-writing) and refers to the fact that these phages code their own RNA polymerase, i.e. are self-transcribing; this is a common characteristic of all of its members.

construction

The virus particles (virions) of the Autographivirinae are not enveloped with an icosahedral head-tail structure and a symmetry ( triangulation number ) T = 7 . The diameter is approx. 60 nm. The genome is linear and has a length of approx. 40–42 kb .

Propagation cycle

Virus replication occurs in the cytoplasm . The virus passes through lysis (resolution) of the host cell by virtue Holin -, endolysin - or Spanin - proteins made from this. The transmission occurs through passive diffusion .

Systematics

The following list lists the species in the subfamily Autographivirinae according to the ICTV Master Species List (MSL) # 35 2019 v1:

  • Family Autographiviridae (obsolete: Autographivirinae , T7 supergroup )
  • Subfamily Beijerinckvirinae
  • Subfamily Colwellvirinae
  • Subfamily Corkvirinae
  • Subfamily Krylovirinae
  • Genus Phikmvvirus (alias Phikmvlikevirus , PhiKMV-like viruses )
  • Genus Tunggulvirus (ICTV misspelling " Tunggulviirus " corrected according to the ICTV rules for generic names)
  • Subfamily Melnykvirinae
  • Subfamily Molineuxvirinae
  • Genus Zindervirus (alias Sp6virus , Sp6likevirus , SP6-like viruses )
  • Subfamily Okabevirinae
  • Subfamily Slopekvirinae
  • Subfamily Studiervirinae
  • without assigned subfamily (selection):

Type species are marked with '*'.

Yet another proposed group in this family are the cyanopodoviruses (proposed genus ' Cyanopodovirus '), whose similarity to Escherichia virus T7 (alias Coliphage T7 ) suggests an assignment to the Autographiviridae (subfamily Studiervirinae ).

Individual evidence

  1. ↑ a b c d ICTV: ICTV Taxonomy history: Enterobacteria phage T4 , EC 51, Berlin, Germany, July 2019; Email ratification March 2020 (MSL # 35)
  2. ↑ a b c Viral Zone. ExPASy, accessed December 29, 2018 .
  3. ^ ICTV : Virus Taxonomy. Retrieved December 29, 2018 .
  4. ↑ D. Scholl, J. Kieleczawa, P. Kemp, J. Rush, CC Richardson, C. Merril, S. Adhya, IJ Molineux: Genomic analysis of bacteriophages SP6 and K1-5, an estranged subgroup of the T7 supergroup . In: Journal of Molecular Biology . tape 335 , no. 5 , 2004, p. 1151–1171 , doi : 10.1016 / j.jmb.2003.11.035 , PMID 14729334 .
  5. ↑ ICTV: ICTV Master Species List 2019.v1 , New MSL including all taxa updates since the 2018b release, March 2020 (MSL # 35)
  6. ↑ a b c d R. Abbasifar, AM Kropinski, PM Sabour, HW Ackermann, A. Alanis Villa, A. Abbasifar, MW Griffiths: The Genome of Cronobacter sakazakii Bacteriophage vB_CsaP_GAP227 Suggests a New Genus within the Autographivirinae . In: Genome Announc . tape 1 , no. 1 , 2013, doi : 10.1128 / genomeA.00122-12 , PMID 23409275 , PMC 3569369 (free full text).
  7. ↑ S. J. Labrie, K. Frois-Moniz, M. S. Osburne, L. Kelly, S. E. Roggensack, M. B. Sullivan, G. Gearin, Q. Zeng, M. Fitzgerald, M. R. Henn, S. W. Chisholm: Genomes of marine cyanopodoviruses reveal multiple origins of diversity . In: Environ. Microbiol. tape 15 , no. 5 , 2013, p. 1356-1376 , doi : 10.1111 / 1462-2920.12053 , PMID 23320838 ( with.edu [PDF]).
  8. ↑ Stephen T. Abedon, Richard Calendar (Ed.): The Bacteriophages. 2nd Edition. Oxford University Press, 2005, ISBN 0-19-803385-0 , pp. 518f. (books.google.de)

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