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相关概念视频

Regulated Protein Degradation02:58

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It is vital to regulate the activity of enzymatic as well as non-enzymatic proteins inside the cell. This can be achieved either through creating a balance between their rate of synthesis and degradation or regulating the intrinsic activity of the protein. Both these regulation mechanisms play an essential role in the normal functioning of cells.
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Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
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In Vitro Analysis of E3 Ubiquitin Ligase Function
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乌比奎丁E3结合酶活动的活性.

Xue Ouyang1, Jialan Chen1, Zhimao Sun2

  • 1Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China.

Frontiers in microbiology
|June 9, 2023
PubMed
概括

拉尔斯托尼亚虫效应物RipAW的E3结合酶活性对于触发植物免疫力并非必不可少,尽管它对于诱导细胞死亡是必需的. 这一发现使得植物中因免疫反应引起的因效应因子诱导的细胞死亡脱而出.

关键词:
拉尔斯托尼亚 (Ralstonia solanacearumarum) 是一个海洋植物.撕裂一个WWW在SGT1中,SGT1是SGT1.细胞死亡是细胞死亡.植物免疫力 植物免疫力

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科学领域:

  • 植物病理学 植物病理学
  • 细菌性植物病原体
  • 植物与微生物的相互作用

背景情况:

  • 拉尔斯托尼亚 (Ralstonia solanacearum) 导致大量的作物损失.
  • 第三类效应器调解R. solanacearum与植物的相互作用.
  • RipAW是一种新型E3酶效应剂,诱导尼古提纳塔米亚的细胞死亡.

研究的目的:

  • 解读RipAW在植物免疫力中的E3酶活性作用.
  • 研究RipAW诱导的细胞死亡与免疫反应之间的关系.
  • 为了确定RipAW介导免疫所需的组件.

主要方法:

  • 生成和分析了E3酶活性突变物 (RipAWC177A) 和RipAW.的截断突变物.
  • 在Nicotiana benthamiana中评估细胞死亡诱导和植物免疫反应.
  • 研究了SGT1,EDS1,NRG1,NRC蛋白质和SA途径的要求.

主要成果:

  • RipAW的E3结合酶活性对于触发植物免疫力是不可或缺的,但对于细胞死亡是必需的.
  • 对于RipAW诱导的细胞死亡,N端,NEL域和C端是必要的,但不够的.
  • 所有的RipAW突变都触发了效应器触发免疫 (ETI) 反应.
  • 由RipAW触发的免疫需要SGT1,但不需要EDS1,NRG1,NRC蛋白或SA途径.

结论:

  • RipAW的E3结合酶活性可以脱离由效应器触发的植物免疫.
  • 这项研究提供了对效应器触发免疫机制的洞察.
  • 这些发现为了解植物防御中的效应器功能提供了一个模型.