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EXECUTER1和单片氧气信号:对核活动的重新评估

Kaiwei Liu¹, Huan Zhao², Keun Pyo Lee¹

¹Shanghai Center for Plant Stress Biology, CAS Center for Excellence in Molecular Plant Sciences (CEMPS), Chinese Academy of Sciences, Shanghai 200032, China.

|November 5, 2024

概括

植物中的单一氧气 (1O2) 信号涉及EXECUTER1 (EX1),一种质细胞蛋白. 这项研究表明EX1不会移动到核中与转录因子相互作用,完善了我们对质细胞与核通信的理解.

科学领域:

植物分子生物学植物分子生物学
蜂信号传输是如何进行的
活性氧物种的新陈代谢

背景情况:

叶绿体作为环境传感器,单氧 (1O2) 在损伤和信号传递中发挥双重作用.
EXECUTER1 (EX1) 是1O2的关键质细胞局部传感器,对于诱导核基因表达至关重要.
最近提出的一种假设是EX1迁移到核中,与WRKY转录因子相互作用.

研究的目的:

为了调查EXECUTER1 (EX1) 作为对单片氧 (1O2) 的反应的拟议核转移.
为了确定EX1是否与核中的WRKY18/40转录因子相互作用.
完善1O2信号传递过程中质体与细胞核通信的模型.

主要方法:

同焦点显微镜和亚细胞分离以评估EX1定位.
热聚治疗试验区分核相关与核局部化蛋白质.
路西法酶补充成像和酵母双杂交试验,以测试蛋白质相互作用.

主要成果:

EX1 不会在核中积聚;它与外核膜相关.
EX1 不与核中的 WRKY18 和 WRKY40 转录因子相互作用.
叶绿体中EX1的降解对于单点氧信号传递至关重要.

结论:

完整的EX1的核转移不是1O2信号中质体与核通信的机制.
这项研究驳斥了EX1核转位和与WRKY18/40.0相互作用的模型.
这些发现需要对叶绿体如何向单片氧信号核反应的理解进行修订.

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