Pbunavirus


Pbunavirus is a genus of viruses in the family Lindbergviridae. Bacteria serve as natural hosts. There are 45 species in this genus.

Taxonomy

The following species are recognized:Pbunavirus Ab28Pbunavirus antinowherePbunavirus BrSP1Pbunavirus crassaPbunavirus datasPbunavirus DL60Pbunavirus DL68Pbunavirus DP1Pbunavirus E215Pbunavirus E217Pbunavirus Epa7Pbunavirus Epa14Pbunavirus EPa61Pbunavirus F8Pbunavirus FBPa14Pbunavirus FBPa35Pbunavirus JG024Pbunavirus KPP12Pbunavirus KTN6Pbunavirus LBL3Pbunavirus LMA2Pbunavirus LS1Pbunavirus NH4Pbunavirus PA01Pbunavirus PA5Pbunavirus Pa193Pbunavirus PA8P1Pbunavirus PaGU11Pbunavirus PB1Pbunavirus ph0031Pbunavirus PS44Pbunavirus PSA09Pbunavirus PSA25Pbunavirus pv109Pbunavirus pv141Pbunavirus R12Pbunavirus R26Pbunavirus S1Pbunavirus SG1Pbunavirus SL1Pbunavirus SNPbunavirus TH15Pbunavirus USP1Pbunavirus victoria

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.
GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
PbunavirusHead-TailNon-envelopedLinearMonopartite

Genome

Genomes are linear, around 65-75kb in length. The genome codes for 90 to 130 proteins. 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 .

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.
GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
PbunavirusBacteria-InjectionLysisCytoplasmCytoplasmPassive 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 . The following year, the name was changed to Pbunalikevirus. This proposal is available . The genus was later renamed to Pbunavirus.