Bromovirus

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Bromovirus
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Transmission electron micrograph of brome mosaic virus (BMV) virions
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Crystal structure of Brome mosaic virus, PDB entry 1js9 [1]
Virus classification OOjs UI icon edit-ltr.svg
(unranked): Virus
Realm: Riboviria
Kingdom: Orthornavirae
Phylum: Kitrinoviricota
Class: Alsuviricetes
Order: Martellivirales
Family: Bromoviridae
Genus:Bromovirus
Species

See text

Bromovirus is a genus of viruses, in the family Bromoviridae . [2] Plants serve as natural hosts. There are seven species in this genus. [3] [4]

Contents

Taxonomy

The following species are assigned to the genus, listed by scientific name and followed by their common names: [5]

Structure

Viruses in the genus Bromovirus are non-enveloped, with icosahedral geometries, and T=3 symmetry. The diameter is around 26 nm. Genomes are linear and segmented, tripartite. [3] [4]

GenusStructureSymmetryCapsidGenomic arrangementGenomic segmentation
BromovirusIcosahedralT=3Non-envelopedLinearSegmented

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, 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
BromovirusPlantsNoneViral movement; mechanical inoculationViral movementCytoplasmCytoplasmMechanical inoculation: insects; contact

Recombination

Brome mosaic virus (BMV) genomes are able to undergo RNA-RNA homologous recombination upon infection of plant cells. [6] The RNA-dependent RNA polymerase specified by the BMV genome appears to undergo template switching (copy choice) recombination during viral RNA synthesis. [7]

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 . hdl: 11586/301641 . PMID   31192783.
  3. 1 2 3 "ICTV Report Bromoviridae".
  4. 1 2 3 "Viral Zone". ExPASy. Retrieved 15 June 2015.
  5. ↑ "Virus Taxonomy: 2024 Release". International Committee on Taxonomy of Viruses. Retrieved 8 March 2025.
  6. ↑ Lai MM (March 1992). "RNA recombination in animal and plant viruses". Microbiol Rev. 56 (1): 61–79. doi:10.1128/mr.56.1.61-79.1992. PMC   372854 . PMID   1579113.
  7. ↑ Kim MJ, Kao C (April 2001). "Factors regulating template switch in vitro by viral RNA-dependent RNA polymerases: implications for RNA-RNA recombination". Proc Natl Acad Sci U S A. 98 (9): 4972–7. Bibcode:2001PNAS...98.4972K. doi: 10.1073/pnas.081077198 . PMC   33148 . PMID   11309487.
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