- Tomato bushy stunt virus
Taxobox
virus_group = iv
familia = "Tombusviridae "
genus = "tombusvirus"Tomato bushy stunt virus is a
tombusvirus first reported intomatoes in1935 . Depending upon the host, TBSV causes stunting of growth, leaf mottling, and deformed or absent fruit. The virus is transmitted manually through the use of contaminated cutting tools. A wide variety of species are affected.The virus is a spherical virus with a
triangulation number of T = 3, hence has 180 subunits of capsid protein. In 1978, its structure was determined by x-ray crystallography byStephen Harrison .The genome of TBSV is a single-stranded postive-sense RNA of ~4800 nucleotides. The virus encodes 5 genes, to express a replicase composed of two proteins (P33 and P92), a capsid protein (CP) of 42 kilodaltons, as well as P19 and P22. The P22 protein is primarily associated with cell to cell movement. The P19 protein is a pathogenicity factor and also is a suppressor of gene silencing.
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