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首页> 外文期刊>Endocytobiosis and Cell Research >CurT contributes to osmotic stress tolerance in Synechocystis independent of compatible solutes
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CurT contributes to osmotic stress tolerance in Synechocystis independent of compatible solutes

机译：CurT有助于分离囊藻中的渗透压，而与相容性溶质无关

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CurT represents a cyanobacterial homolog of the Arabidopsis CURVATURE THYLAKOID1 protein family, which is involved in grana formation in chloroplasts. Inactivation of the curT gene has recently been shown to cause severe alterations of the thylakoid membrane architecture affecting in particular PSII biogenesis. The CurT protein localized with high local abundances in regions, where the thylakoids converge towards the plasma membrane. Interestingly, CurT relocalized to the plasma membrane under salt and osmotic stress. Consistent with a potential role of this protein during stress response, the curT- mutant exhibited a high sensitivity towards both high exogenous salt and osmotic concentrations. This study demonstrates that curT- is still able to accumulate compatible solutes in amounts and dynamics similar to wild-type cells. In conclusion, accumulation of compatible solutes is not sufficient to provide protection from osmotic stress. Moreover, CurT-dependent membrane stabilization appears to be required to enable cells to resist high levels of osmotic stress.
机译：CurT代表拟南芥弯曲THYLAKOID1蛋白家族的蓝细菌同源物，其参与叶绿体中的颗粒形成。最近已证实，curT基因的失活会引起类囊体膜结构的严重改变，从而特别影响PSII生物发生。 CurT蛋白以类固醇向质膜汇聚的区域高局部丰度定位。有趣的是，CurT在盐和渗透胁迫下重新定位于质膜。与该蛋白在应激反应期间的潜在作用一致，curT-突变体对高外源盐和渗透浓度均表现出高敏感性。这项研究表明，curT-仍然能够以与野生型细胞相似的数量和动力学积累相容性溶质。总之，相容性溶质的积累不足以提供抵抗渗透压的保护作用。而且，似乎需要使CurT依赖的膜稳定化才能使细胞抵抗高水平的渗透压。

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