一种保存的细胞外LRR-only蛋白质破坏了BAK1-介导的免疫受体形成,以负面调节植物免疫力
Liangliang Zhu1, Yayuan Bai1, Jianying Liu1
1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, College of Plant Protection, Northwest A&F University, Yangling, 712100, Shaanxi, China.
The New phytologist
|February 12, 2026
概括
植物使用细胞外白丰富的重复性蛋白质,如NbLRRP1,来调节免疫反应. 这种蛋白质抑制模式触发免疫力 (PTI),通过与关键信号组件相互作用来增强作物疾病抵抗力.
科学领域:
- 植物免疫力 植物免疫力
- 分子植物病原体相互作用
- 细胞外蛋白质的功能
背景情况:
- 模式触发免疫 (PTI) 对植物防御至关重要,但需要监管以防止生长成本.
- 植物免疫的细胞内调节剂得到了充分的研究,但细胞外调节剂在很大程度上是未知的.
- 细胞外氨酸丰富的仅重复 (eLRR) 蛋白质是丰富的,但在免疫调节中功能性无特征.
研究的目的:
- 识别和描述植物免疫的细胞外调节剂.
- 研究eLRR蛋白在模式触发免疫 (PTI) 中的功能.
- 探索eLRR蛋白质在增强作物抗病能力方面的潜力.
主要方法:
- 在Nicotiana benthamiana中进行全基因组查,以识别eLRR蛋白.
- 生物化学测试以确定蛋白质定位和相互作用.
- 对淘汰植物进行分析,以评估免疫反应和抗病能力.
主要成果:
- 确定了eLRR蛋白NbLRRP1,并发现它被分泌到质细胞中.
- NbLRRP1抑制由各种病原体相关分子模式 (PAMPs) 诱导的PTI.
- NbLRRP1-淘汰植物表现出对Sclerotinia sclerotiorum的增强抵抗力,并与NbBAK1相互作用以破坏免疫综合体.
结论:
- NbLRRP1通过破坏免疫受体复合体的形成,作为PTI的负调节剂.
- 这种eLRR介导的免疫抑制机制在各种植物物种中得到保护.
- NbLRRP1代表了一种潜在的分子标,用于提高作物中抗病能力.
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