Tobacco virtovirus 1

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Tobacco virtovirus 1
Crystals of "Tobacco virtovirus 1" grown in space. They are ca. ~1.5 mm long and ~30 times larger by volume than Earth-grown samples.
Crystals of Tobacco virtovirus 1 grown in space. They are ca. ~1.5 mm long and ~30 times larger by volume than Earth-grown samples.[1]
Virus classification e
(unranked): Virus
Realm: Riboviria
Phylum: incertae sedis
Genus: Virtovirus
Tobacco virtovirus 1
  • Tobacco mosaic satellite virus
  • Satellite tobacco mosaic virus
Schematic diagram of a Virtovirus particle, cross section and side view.

Tobacco virtovirus 1, informally called Tobacco mosaic satellite virus, Satellite tobacco mosaic virus (STMV), or tobacco mosaic satellite virus, is a satellite virus first reported in Nicotiana glauca from southern California, U.S.. Its genome consists of linear positive-sense single-stranded RNA.[3]

The trivial genome map of satellite virus genera Virtovirus and Aumaivirus[4]

Tobacco virtovirus 1 is a small, icosahedral plant virus which worsens the symptoms of infection by Tobacco mosaic virus (TMV). Satellite viruses are some of the smallest possible reproducing units in nature; they achieve this by relying on both the host cell and a host virus (in this case, TMV) for the machinery necessary for them to reproduce. The entire Tobacco virtovirus 1 particle consists of 60 identical copies of a single protein (CP) that make up the viral capsid (coating), and a 1063-nucleotide single-stranded RNA genome which codes for the capsid and one other protein of unknown function.[5]


  1. ^ McPherson, Alexander; Delucas, Lawrence James (2015). "Microgravity protein crystallization". NPJ Microgravity. 1: 15010–. doi:10.1038/npjmgrav.2015.10. PMC 5515504. PMID 28725714.
  2. ^ Krupovic, Mart; Fischer, Matthias; Kuhn, Jens H. (15 June 2015). "To create 1 new species within: Virtovirus" (PDF). International Committee on Taxonomy of Viruses (ICTV). p. 5. Retrieved 19 June 2019.
  3. ^ Dodds, J. A. (1998). "Satellite Tobacco Mosaic Virus". Annual Review of Phytopathology. 36: 295–310. doi:10.1146/annurev.phyto.36.1.295. PMID 15012502.
  4. ^ NCBI: Aumaivirus (genus)
  5. ^ "Molecular Dynamics of STMV". Beckman Institute for Advanced Science and Technology, University of Illinois.

Further reading[edit]