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Bromoviridae

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Bromoviridae
Crystal structure of Brome mosaic virus
Transmission electron micrograph of brome mosaic virus (BMV) virions
Crystal structure of Brome mosaic virus, PDB entry 1js9[1]
Virus classification Edit this classification
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Martellivirales
Family: Bromoviridae
Genera

Alfamovirus
Anulavirus
Bromovirus
Cucumovirus
Ilarvirus
Oleavirus

Bromoviridae is a family of viruses.[2] Plants serve as natural hosts. There are six genera in the family.[3][4]

Taxonomy

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The following genera are assigned to the family:[3]

Structure

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Viruses in the family Bromoviridae are non-enveloped, with icosahedral and bacilliform geometries. The diameter is around 26-35 nm.[3][4]

Several different types of virion to be found in family Bromoviridae
Genus Structure Symmetry Capsid Genomic arrangement Genomic segmentation
Ilarvirus Icosahedral T=3 Non-enveloped Linear Segmented
Anulavirus Icosahedral T=3 Non-enveloped Linear Segmented
Bromovirus Icosahedral T=3 Non-enveloped Linear Segmented
Oleavirus Icosahedral T=1 Non-enveloped Linear Segmented
Alfamovirus Varies Non-enveloped Linear Segmented
Cucumovirus Icosahedral T=3 Non-enveloped Linear Segmented

Genomes are linear and segmented, tripartite.[3][4]

Bromoviridae genome map

Life cycle

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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, using the internal initiation model of subgenomic rna 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 and contact.[3][4]

Genus Host details Tissue tropism Entry details Release details Replication site Assembly site Transmission
Ilarvirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects; contact
Anulavirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Unknown
Bromovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects; contact
Oleavirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects; contact
Alfamovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects
Cucumovirus Plants None Viral movement; mechanical inoculation Viral movement Cytoplasm Cytoplasm Mechanical inoculation: insects; contact

References

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  1. ^ Lucas, R. W.; Larson, S. B.; McPherson, A. (2002). "The crystallographic structure of Brome mosaic virus" (PDF). Journal of Molecular Biology. 317 (1): 95–108. doi:10.1006/jmbi.2001.5389. PMID 11916381.
  2. ^ Bujarski, J; Gallitelli, D; García-Arenal, F; Pallás, V; Palukaitis, P; Reddy, MK; Wang, A; ICTV Report, Consortium (August 2019). "ICTV Virus Taxonomy Profile: Bromoviridae". The Journal of General Virology. 100 (8): 1206–1207. doi:10.1099/jgv.0.001282. hdl:11586/301641. PMID 31192783.
  3. ^ a b c d e "ICTV Report Bromoviridae".
  4. ^ a b c d "Viral Zone". ExPASy. Retrieved 15 June 2015.
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