''Yingchengvirus'' is a
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...
of double stranded DNA viruses that infect haloarchaea. The genus was previously named ''Betasphaerolipovirus''.
Taxonomy
The genus contains the following species:
* ''
Yingchengvirus HJIV1
''Yingchengvirus'' is a genus of double stranded DNA viruses that infect haloarchaea. The genus was previously named ''Betasphaerolipovirus''.
Taxonomy
The genus contains the following species:
* '' Yingchengvirus HJIV1''
* '' Yingchengvirus NV ...
''
* ''
Yingchengvirus NVIV1
''Yingchengvirus'' is a genus of double stranded DNA viruses that infect haloarchaea. The genus was previously named ''Betasphaerolipovirus''.
Taxonomy
The genus contains the following species:
* ''Yingchengvirus HJIV1''
* '' Yingchengvirus NVI ...
''
* ''
Yingchengvirus SNJ1
''Yingchengvirus'' is a genus of double stranded DNA viruses that infect haloarchaea. The genus was previously named ''Betasphaerolipovirus''.
Taxonomy
The genus contains the following species:
* ''Yingchengvirus HJIV1''
* ''Yingchengvirus NVIV ...
''
Morphology
Viruses of this genus have tailless icosahedral virions with an internal lipid membrane located between the protein capsid and the circular double stranded DNA genome.
Replication
The temperate haloarchaeal virus SNJ1 displays lytic and lysogenic life cycles. During the lysogenic cycle, the virus resides in its host in the form of an extrachromosomal circular
plasmid
A plasmid is a small, extrachromosomal DNA molecule within a cell that is physically separated from chromosomal DNA and can replicate independently. They are most commonly found as small circular, double-stranded DNA molecules in bacteria; howev ...
. Upon
mitomycin C
Mitomycin C is a mitomycin that is used as a chemotherapeutic agent by virtue of its antitumour activity.
Medical uses
It is given intravenously to treat upper gastro-intestinal cancers (e.g. esophageal carcinoma), anal cancers, and breas ...
induction, large amounts of SNJ1 virions can be produced. SNJ1 genome replicates by the rolling-circle mechanism and is initiated by the virus-encoded RepA protein, which is homologous to the replication-initiation proteins of archaeal plasmids and bacterial transposases of the IS91 family
insertion sequences Insertion element (also known as an IS, an insertion sequence element, or an IS element) is a short DNA sequence that acts as a simple transposable element. Insertion sequences have two major characteristics: they are small relative to other trans ...
.
The virus is released by lysis of the infected cells.
References
Virus genera
{{virus-stub