''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. Viruses are found in almo ...

in the class ''

Caudoviricetes ''Caudoviricetes'' is a class of viruses known as tailed viruses and head-tail viruses (''cauda'' is Latin for "tail"). It is the sole representative of its own phylum, ''Uroviricota'' (from ''ouros'' (ουρος), a Greek word for "tailed" + ...

''. Bacteria serve as natural hosts, with transmission achieved through passive diffusion. There is only one species in this genus: ''Ravinvirus 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. A viral envelope protein or E protein is a protein in the env ...

, 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 ''

Siphoviridae ''Siphoviridae'' was a family of double-stranded DNA viruses in the order '' Caudovirales''. The family ''Siphoviridae'' and order '' Caudovirales'' have now been abolished, with the term siphovirus now used to refer to the morphology of viruses ...

'' in order ''

Caudovirales ''Caudoviricetes'' is a class of viruses known as tailed viruses and head-tail viruses (''cauda'' is Latin for "tail"). It is the sole representative of its own phylum, ''Uroviricota'' (from ''ouros'' (ουρος), a Greek word for "tailed" + ...

''. I
2012
the genus was renamed to ''N15likevirus''. The genus was later renamed to ''Ravinvirus'' in 2019.

References

External links

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