SOS1 tonoplast neo-localization and the RGG protein SALTY are important in the extreme salinity tolerance of Salicornia bigelovii

文献类型： 外文期刊

第一作者： Salazar, Octavio R.

作者： Salazar, Octavio R.;Melino, Vanessa J.;Reddy, Muppala P.;Vega, Juan Pablo Arciniegas;Leal, Lina Maria Caceres;Aranda, Manuel;Jaremko, Lukasz;Jaremko, Mariusz;Tester, Mark;Salazar, Octavio R.;Melino, Vanessa J.;Reddy, Muppala P.;Vega, Juan Pablo Arciniegas;Leal, Lina Maria Caceres;Tester, Mark;Salazar, Octavio R.;Aranda, Manuel;Chen, Ke;Hribova, Eva;Cizkova, Jana;Berankova, Denisa;Fedoroff, Nina V.;Schmoeckel, Sandra M.

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：14.7； 五年影响因子：16.1 ）

ISSN：

年卷期： 2024 年 15 卷 1 期

页码：

收录情况： SCI

摘要： The identification of genes involved in salinity tolerance has primarily focused on model plants and crops. However, plants naturally adapted to highly saline environments offer valuable insights into tolerance to extreme salinity. Salicornia plants grow in coastal salt marshes, stimulated by NaCl. To understand this tolerance, we generated genome sequences of two Salicornia species and analyzed the transcriptomic and proteomic responses of Salicornia bigelovii to NaCl. Subcellular membrane proteomes reveal that SbiSOS1, a homolog of the well-known SALT-OVERLY-SENSITIVE 1 (SOS1) protein, appears to localize to the tonoplast, consistent with subcellular localization assays in tobacco. This neo-localized protein can pump Na+ into the vacuole, preventing toxicity in the cytosol. We further identify 11 proteins of interest, of which SbiSALTY, substantially improves yeast growth on saline media. Structural characterization using NMR identified it as an intrinsically disordered protein, localizing to the endoplasmic reticulum in planta, where it can interact with ribosomes and RNA, stabilizing or protecting them during salt stress.

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