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STNV domain; satellite tobacco necrosis virus (STNV) are small plant viruses which are completely dependent on the presence of a specific helper virus, TNV, for their replication; 60 identical subunits, this domain is one of them; form an icosahedral shell around a single RNA molecule. Half of the RNA codes for the coat protein with the other half being non-coding. The STNV domain has a "Swiss roll" Greek key topology with its two 4-stranded antiparallel beta sheets
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Jiyao W et al.(2023). "The conserved domain database in 2023.",