StRemorin1.3 hampers Potato virus X TGBp1 ability to increase plasmodesmata permeability, but does not interfere with its silencing suppressor activity

作者：Artemis Perraki, María Julieta Binaghi, Martín A. Mecchia, Julien Gronnier, Sylvie German‐Retana, Sébastien Mongrand, Emmanuelle Bayer, Alicia M. Zelada, Véronique Germain · 发表于：FEBS Letters · 年份：2014 · DOI：10.1016/j.febslet.2014.03.014 · 被引用次数：67 · 研究领域：Plant Virus Research Studies、Plant Disease Resistance and Genetics、Plant Pathogenic Bacteria Studies

The Triple Gene Block 1 (TGBp1) protein encoded by the Potato virus X is a multifunctional protein that acts as a suppressor of RNA silencing or facilitates the passage of virus from cell to cell by promoting the plasmodesmata opening. We previously showed that the membrane raft protein StRemorin1.3 is able to impair PVX infection. Here, we show that overexpressed StRemorin1.3 does not impair the silencing suppressor activity of TGBp1, but affects its ability to increase plasmodesmata permeability. A similar effect on plasmodesmata permeability was observed with other movement proteins, suggesting that REM is a general regulator of plasmodesmal size exclusion limit. These results add to our knowledge of the mechanisms underlying the StREM1.3 role in virus infection.