Pbunavirus (synonyms: Pb1likevirus, Pbunalikevirus) is a genus of viruses in the family Lindbergviridae. Bacteria serve as natural hosts. There are 45 species in this genus.[1][2][3]

Taxonomy

The following species are recognized:[2]

Structure

Pbunaviruses are nonenveloped, with a head and tail. The head has a diameter of about 75  nm. The tail is around 140 nm long displaying a criss-cross pattern, has a small baseplate, and is contractile.[1]

Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Pbunavirus Head-Tail Non-enveloped Linear Monopartite

Genome

Genomes are linear, around 65-75kb in length. The genome codes for 90 to 130 proteins.[1] Some species have been fully sequenced and are available from ICTV. They range between 64k and 73k nucleotides, with 88 to 127 proteins. The complete genomes are available from here.[3]

Life cycle

Viral replication is cytoplasmic. 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. 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. Bacteria serve as the natural host. Transmission routes are passive diffusion.[1]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Pbunavirus Bacteria None Injection Lysis Cytoplasm Cytoplasm Passive diffusion

History

According to the ICTV's 2010–11 report, the genus Pb1likevirus was first accepted as a new genus, at the same time as all of its contained species. This proposal is available here. The following year (2012), the name was changed to Pbunalikevirus. This proposal is available here.[2] The genus was later renamed to Pbunavirus.

References

  1. ^ a b c d "Viral Zone". ExPASy. Retrieved 1 July 2015.
  2. ^ a b c "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 6 March 2025.
  3. ^ a b NCBI. "Pbunalikevirus Complete Genomes". Retrieved 17 February 2015.

Allikas: http://en.wikipedia.org/wiki/Pbunavirus
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