''Ravinvirus'' (synonym ''N15-like viruses'', ''N15likevirus'') is a genus of

viruses A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Viruses infect all life forms, from animals and plants to microorganisms, including bacteria and archaea. Since Dmitri Ivanovsky's 1 ...

in the order ''

Caudovirales ''Caudovirales'' is an order of viruses known as the tailed bacteriophages (''cauda'' is Latin for "tail"). Under the Baltimore classification scheme, the ''Caudovirales'' are group I viruses as they have double stranded DNA (dsDNA) genomes, ...

'', in the family ''

Siphoviridae ''Siphoviridae'' is a family of double-stranded DNA viruses in the order ''Caudovirales''. Bacteria and archaea serve as natural hosts. There are 1,166 species in this family, assigned to 366 genera and 22 subfamilies. The characteristic structu ...

''. Bacteria serve as natural hosts, with transmission achieved through passive diffusion. There is only one species in this genus: ''Escherichia virus N15''.

Structure

Ravinviruses are

nonenveloped A viral envelope is the outermost layer of many types of viruses. It protects the genetic material in their life cycle when traveling between host cells. Not all viruses have envelopes. Numerous human pathogenic viruses in circulation are encase ...

, with a head and tail. The head is about 60 nm in diameter. The tail is long and flexible, at about 140 nm long, 8 nm wide, with short brush-like terminal fibers.

Genome

''Escherichia virus N15'' has been fully sequenced. It has about 46k nucleotides, with 60 proteins. The complete genome is availabl
here
ref name=NCBI>

Life cycle

Viral replication is cytoplasmic. The virus attaches to the host cell's adhesion receptors using its terminal fiber, and ejects the viral DNA into the host cytoplasm vi

Replication follows the replicative transposition model. 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.

History

According to ICTV, the genus ''N15likevirus'' was first accepted under the name ''N15-like viruses'' i
2004
assigned to family ''

'' in order ''

''. I
2012
the genus was renamed to ''N15likevirus''. The genus was later renamed to ''Ravinvirus''.

References

External links

ICTV
{{Taxonbar, from1=Q69870205, from2=Q18813108 Siphoviridae Virus genera