9.B.308.6.1
Three comoponent (triple gene block, TGB) TGBp1, 2 and 3, of 463 and 0 - 2 TMSs; 119 aas with 2 TMSs, N- and C-terminal, and 190 aas with 2 TMSs, N- and C-terminal, respectively, of potato mop-top virus (PMTV) (Cowan et al. 2002; Zamyatnin et al. 2004). This 3-component complex participates in the transport of viral RNA to the plasmodemata (Haupt et al. 2005). TGBp3 most probably contains signals of plasmodesmata targeting and is therefore involved in the targeting of TGBp2 and viral RNAs-TGBp1 (RNP complex), to plasmodesmata (Tilsner et al. 2010). TGBp2 can gate plasmodesmata and increase their size exclusion limit. TGBp2 and TGBp3 are necessary for the intracellular delivery of TGBp1-containing vRNPs to plasmodesmata (Shemyakina et al. 2011). Microtubule association is required for plasmodesmal targeting of TGBp1 (Shemyakina et al. 2011).