Alphaflexiviridae

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Alphaflexiviridae
Virus classification
Group: Group IV ((+)ssRNA)
Order: Tymovirales
Family: Alphaflexiviridae
Genera

Alphaflexiviridae is a family of viruses in the order Tymovirales. Plants and fungi serve as natural hosts. There are currently 51 species in this family, divided among 6 genera. Diseases associated with this family include: mosaic and ringspot symptoms.[1][2]

Taxonomy[edit]

Group: ssRNA(+)

[2]

Structure[edit]

Viruses in Alphaflexiviridae are non-enveloped, with flexuous and Filamentous geometries. The diameter is around 12-13 nm. Genomes are linear, around 5.4-9kb in length. The genome codes for 1 to 6 proteins.[1]

Genus Structure Symmetry Capsid Genomic Arrangement Genomic Segmentation
Allexivirus Filamentous Non-Enveloped Linear Monopartite
Potexvirus Filamentous Non-Enveloped Linear Monopartite
Botrexvirus Filamentous Non-Enveloped Linear Monopartite
Sclerodarnavirus Capsid-less Non-Enveloped Linear Monopartite
Lolavirus Filamentous Non-Enveloped Linear Monopartite
Mandarivirus Filamentous Non-Enveloped Linear Monopartite

Life Cycle[edit]

Viral replication is cytoplasmic, and is lysogenic. 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. Translation takes place by leaky scanning. The virus exits the host cell by tripartite non-tubule guided viral movement. Plants and fungi serve as the natural host. The virus is transmitted via a vector (insects). Transmission routes are vector and mechanical.[1]

Genus Host Details Tissue Tropism Entry Details Release Details Replication Site Assembly Site Transmission
Allexivirus Plants: Shallot; plants: onion; plants: garlic None Viral movement; mechanical innoculation Viral movement Cytoplasm Cytoplasm Mites
Potexvirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Insects
Botrexvirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Unknown
Sclerodarnavirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Unknown
Lolavirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Unknown
Mandarivirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Unknown

References[edit]

  1. ^ a b c "Viral Zone". ExPASy. Retrieved 12 June 2015. 
  2. ^ a b ICTV. "Virus Taxonomy: 2014 Release". Retrieved 12 June 2015. 

External Links[edit]