通过细菌效应蛋白抑制微RNA通路
Lionel Navarro1, Florence Jay, Kinya Nomura
1Institut de Biologie Moléculaire des Plantes, CNRS UPR 2353-Université Louis Pasteur, 12 Rue du Général Zimmer, 67084 Strasbourg Cedex, France.
概括
微RNAs (miRNAs) 对于植物对细菌病原体的防御至关重要. 缺乏miRNAs的植物对细菌感染具有增强的抵抗力,这表明miRNAs抑制基底免疫力.
科学领域:
- 植物免疫力 植物免疫力
- 微RNA (miRNA) 的调节规则
- 细菌病原体的发生.
背景情况:
- 植物和动物检测出与病原体相关的分子模式 (PAMPs),从而触发防御反应.
- 微RNAs (miRNAs) 在PAMP感知上受到差异调节,但它们在先天免疫中的作用尚不清楚.
研究的目的:
- 调查miRNA途径对植入先天性免疫的贡献.
- 为了识别针对miRNA路径的细菌效应者.
主要方法:
- 对阿拉比多普西斯miRNA缺乏突变的分析.
- 在野生型和突变植物中评估Pseudomonas syringae和其他菌株的细菌生长.
- 识别涉及抑制miRNA功能的Pseudomonas注射器效应体.
主要成果:
- 缺少miRNAs的阿拉比多普西斯突变体表现出一种III型分泌缺陷的Pseudomonas syringae突变体的部分恢复生长.
- 这些miRNA缺乏突变体也维持了非致病性Pseudomonas光体和大肠杆菌的生长.
- 鉴定出了抑制PAMP响应miRNA激活,生物发生,稳定性或活性的伪蒙娜注射器效应剂.
结论:
- 微RNA是植物对细菌病原体基础防御的关键组成部分.
- 细菌,类似于病毒,已经发展出抑制RNA沉默通路的机制,以成功感染.
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