Picovirinae

Picovirinae
Virus classification
(unranked): Virus
Realm: Duplodnaviria
Kingdom: Heunggongvirae
Phylum: Uroviricota
Class: Caudoviricetes
Order: Caudovirales
Family: Salasmaviridae
Subfamily: Picovirinae
Synonyms[1]
  • Nanovirinae

Picovirinae is a subfamily of viruses in the order Caudovirales, in the family Salasmaviridae. Bacteria serve as natural hosts. There are two genera and seven species in this subfamily.[2][3]

Taxonomy

The following genera and species are recognized:[3]

  • Beecentumtrevirus
    • Bacillus phage Nf
    • Bacillus virus B103
    • Bacillus virus Goe1
  • Salasvirus
    • Bacillus virus Goe6
    • Bacillus virus Gxv1
    • Bacillus virus phi29
    • Bacillus virus PZA

Structure

Viruses in Picovirinae are non-enveloped, with icosahedral or prolate heads of about 50–55 nm in diameter, and short tails. Genomes are linear, double stranded DNA, and are relatively small (between 16–20 kbp)-hence the term pico-virinae. Picoviruses package linear, monomeric genomes with a terminal protein covalently attached to each end.[2]

Life cycle

Viral replication is cytoplasmic. Entry into the host cell is achieved by adsorption into the host cell. Replication follows the DNA strand displacement model. DNA-templated transcription is the method of transcription. Bacteria serve as the natural host. Transmission routes are passive diffusion.[2]

References

  1. ↑ Lavigne, R.; Seto, D.; Mahadevan, P.; Ackermann, H. W.; Kropinki, A. M. (2008). "Unifying classical and molecular taxonomic classification: analysis of the Podoviridae using BLASTP-based tools". Research in Microbiology. 159 (5): 406–14. doi:10.1016/j.resmic.2008.03.005. PMID 18555669.
  2. 1 2 3 "Viral Zone". ExPASy. Retrieved 1 July 2015.
  3. 1 2 "Virus Taxonomy: 2020 Release". International Committee on Taxonomy of Viruses (ICTV). March 2021. Retrieved 12 May 2021.
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