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Two small viral proteins (DGBp1 and DGBp2) have been proposed to act in a concerted manner to aid intra- and intercellular trafficking of carmoviruses though the distribution of functions and mode of action of each protein partner are not yet clear. Here we have confirmed the requirement of the DGBps of Pelargonium flower break virus (PFBV), p7 and p12, for pathogen movement. Studies focused on p12...
Circularization of cellular mRNAs is a key event prior to translation initiation. We report that efficient translation of Saguaro cactus virus (SCV) requires a 3′ translational enhancer (PTE) located partially in coding sequences. Unlike a similar PTE reported in the 3′ UTR of Pea enation mosaic virus that does not engage in an RNA:RNA interaction (Wang Z. et al., J. Biol. Chem. 284, 14189–14202,...
SatC is a noncoding subviral RNA associated with Turnip crinkle virus (TCV). A 100-nt stretch in the 3′ UTR of TCV contains three hairpins and two pseudoknots that fold into a tRNA-shaped structure (TSS) that binds 80S ribosomes. The 3′ half of satC is derived from TCV and contains 6-nt differences in the TSS-analogous region. SatC binds poorly to 80S ribosomes, and molecular modeling that predicted...
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