''Secoviridae'' is a family 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 ...
in the order ''
Picornavirales
''Picornavirales'' is an order of viruses with vertebrate, invertebrate, protist and plant hosts. The name has a dual etymology. First, ''picorna-'' is an acronym for poliovirus, insensitivity to ether, coxsackievirus, orphan virus, rhinovirus, ...
''. Plants serve as natural hosts. There are 8 genera and 86 species in this family, one of which is unassigned to a genus.
The family was created in 2009 with the grouping of families ''Sequiviridae'', now dissolved, and ''Comoviridae'', now subfamily ''Comovirinae'', along with the then unassigned genera ''Cheravirus'', ''Sadwavirus'', and ''Torradovirus''.
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Taxonomy
The family includes the following genera (-''virinae'' denotes subfamily and -''virus'' denotes genus):Comovirinae
''Comovirinae'' is a subfamily of viruses in the order ''Picornavirales'', in the family ''Secoviridae''; its genera were formerly classified in the family ''Comoviridae''. Plants serve as natural hosts. There are 62 species in this subfamily, a ...
''
** '' Comovirus''
** '' Fabavirus''
** '' Nepovirus''
* Unassigned to a subfamily:
** '' Cheravirus''
** '' Sadwavirus''
** '' Sequivirus''
** '' Torradovirus''
** '' Waikavirus''
Lastly, one species is unassigned to a genus: '' Strawberry latent ringspot virus''.
Structure
Viruses in ''Secoviridae'' are non-enveloped, with icosahedral geometries, and T=pseudo3 symmetry. The diameter is around 25-30 nm. Genomes are linear and segmented, bipartite, around 24-7kb in length.
Life cycle
Viral replication is cytoplasmic. Entry into the host cell is achieved by penetration into the host cell. Replication follows the positive stranded RNA virus replication model. Positive stranded RNA virus transcription is the method of transcription. The virus exits the host cell by tubule-guided viral movement.
Plants serve as the natural host. Transmission routes are mechanical.
Evolution
The subfamily ''Comovirinae'' evolved ~1,000 years ago with extant species diversifying between 50 and 250 years ago.
References
External links
ICTV Online (10th) Report: ''Secoviridae''
* UniProt Taxonom
{{Taxonbar, from=Q3477217
Secoviridae,
Virus families
Picornavirales