| Tombusvirus | |
|---|---|
| Virus classification | |
| Group: | Group IV ((+)ssRNA) |
| Family: | Tombusviridae |
| Genus: | Tombusvirus |
The genus Tombusvirus are part of the family Tombusviridae and are members of group IV of the Baltimore classification of viruses. The genomes consist of positive sense single-stranded RNA with a genome size of 4800 nucleotides. The virions are non-enveloped with a diameter of 30 nm and have an isometric nucleocapsid (icosahedral; T=3). These virions have a regular surface structure and are composed of 17% nucleic acid.
This genera of viruses include the tomato bushy stunt virus (hence the name).
The virus uses the cis-regulatory elements, Tombus virus defective interfering (DI) RNA region 3 and Tombusvirus 5' UTR to control expression of defective interfering RNAs and viral RNA replication.[1][2]