Role of Capsid Proteins
Coat proteins (CPs) of all plant viruses have an early function in disassembly of parental virus and a late function in assembly of progeny virus. Depending on the virus, however, CPs may play a role in many steps of the infection cycle in between these early and late functions. It has been shown that CPs can play a role in translation of viral RNA, targeting of the viral genome to its site of replication, cell-to-cell and/or systemic movement of the virus, symptomatology and virulence of the infection, activation of Rgene-mediated host defenses, suppression of RNA silencing, interference with suppression of RNA silencing, and determination of the specificity of virus transmission by vectors. These functions are reviewed in this chapter.
KeywordsVirus assembly Virus disassembly Translation of viral RNA Replication of viral RNA Cell-to-cell movement Long-distance movement Hypersensitive response RNA silencing Vector transmission
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