''Bromovirus'' is a genus of

virus 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 Ivanovsk ...

es, in the family ''

Bromoviridae ''Bromoviridae'' is a family of viruses. Plants serve as natural hosts. There are six genera in the family. Taxonomy The following genera are assigned to the family: * ''Alfamovirus'' * ''Anulavirus'' * ''Bromovirus'' * ''Cucumovirus'' * ''Ilar ...

''. Plants serve as natural hosts. There are six species in this genus.

Taxonomy

The following species are assigned to the genus: * '' Broad bean mottle virus'' * '' Brome mosaic virus'' * '' Cassia yellow blotch virus'' * '' Cowpea chlorotic mottle virus'' * '' Melandrium yellow fleck virus'' * '' Spring beauty latent virus''

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.

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.

Recombination

''Brome mosaic virus'' (BMV)

genome In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding g ...

s are able to undergo

RNA Ribonucleic acid (RNA) is a polymeric molecule essential in various biological roles in coding, decoding, regulation and expression of genes. RNA and deoxyribonucleic acid ( DNA) are nucleic acids. Along with lipids, proteins, and carbohydra ...

homologous recombination Homologous recombination is a type of genetic recombination in which genetic information is exchanged between two similar or identical molecules of double-stranded or single-stranded nucleic acids (usually DNA as in cellular organisms but may ...

upon infection of plant cells. The RNA-dependent RNA polymerase specified by the BMV genome appears to undergo template switching (copy choice) recombination during viral RNA synthesis.Kim MJ, Kao C. Factors regulating template switch in vitro by viral RNA-dependent RNA polymerases: implications for RNA-RNA recombination. Proc Natl Acad Sci U S A. 2001 Apr 24;98(9):4972-7. doi: 10.1073/pnas.081077198. Epub 2001 Apr 17. PMID 11309487; PMCID: PMC33148

References

External links

ICTV Report: ''Bromoviridae''

{{Taxonbar, from=Q17081113 Bromoviridae Virus genera