Bromoviridae

Bromoviridae is a family of viruses.[2] Plants serve as natural hosts. There are currently 36 species in this family, divided among 6 genera.[3][4]

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

Alfamovirus
Anulavirus
Bromovirus
Cucumovirus
Ilarvirus
Oleavirus

Taxonomy

Group: ssRNA(+)

[3]

Structure

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

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
IlarvirusIcosahedralT=3Non-envelopedLinearSegmented
AnulavirusIcosahedralT=3Non-envelopedLinearSegmented
BromovirusIcosahedralT=3Non-envelopedLinearSegmented
OleavirusIcosahedralT=1Non-envelopedLinearSegmented
AlfamovirusVariesNon-envelopedLinearSegmented
CucumovirusIcosahedralT=3Non-envelopedLinearSegmented

Life cycle

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]

GenusHost detailsTissue tropismEntry detailsRelease detailsReplication siteAssembly siteTransmission
IlarvirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
AnulavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmUnknown
BromovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
OleavirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
AlfamovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects
CucumovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact
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References
  1. Lucas, R. W.; Larson, S. B.; McPherson, A. (2002). "The crystallographic structure of Brome mosaic virus". 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. PMID 31192783.
  3. "ICTV Report Bromoviridae".
  4. "Viral Zone". ExPASy. Retrieved 15 June 2015.
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