在小麦中,由工程宿主蛋白TaHRLI赋予的持久耐性,以逃避病毒效应因子PstCRT的识别
Shuangyuan Guo1, Yanqin Zhang2, Xinmei Zhang1
1College of Life Science, Northwest A&F University, Yangling 712100, Shaanxi, China; State Key Laboratory for Crop Stress Resistance and High-Efficiency Production, Northwest A&F University, Yangling 712100, Shaanxi, China.
Current biology : CB
|February 3, 2026
概括
像PstCRT这样的病原体作用者通过阻断内质网膜 (ER) 应激反应来破坏植物免疫力. 工程小麦的TaHRLI蛋白抵抗PstCRT提供了对小麦茎生的广泛抗性,提高了作物保护.
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
- 细胞内膜网膜应激压力
背景情况:
- 细胞内膜网膜 (ER) 应激和过敏反应 (HR) 是植物的关键防御.
- 病原体克服这些防御的策略尚未完全理解.
研究的目的:
- 识别破坏ER压力介导免疫力的病原体影响者.
- 阐明病原体干扰植物防御的机制.
- 制定可持续作物保护的战略.
主要方法:
- 鉴定了来自Puccinia striiformis f. sp. 的PstCRT效应体. 三子 (Pst) 的意思.
- 研究了PstCRT与小麦HR样病变诱导蛋白 (TaHRLI) 的相互作用.
- 用AlphaFold进行蛋白质结构分析和工程.
- 在小麦中生成并测试了TaHRLI突变体 (TaHRLI Mut).
主要成果:
- 通过防止TaHRLI转移到ER,PstCRT可以抑制ER压力诱导的HR.
- PstCRT模仿小麦卡莱蒂库林 (TaCRT) 来隔离TaHRLI,抑制Ca2+外流和未折叠的蛋白质反应 (UPR).
- 设计的TaHRLIMut避免了PstCRT的识别,并赋予了对Pst的广泛抗性.
结论:
- 病原体calreticulin效应剂代表了一种破坏ER压力介导的植物免疫力的保守策略.
- 工程 TaHRLI 提供了一种新的方法,可以长期抵抗小麦生.
- 这项研究提供了关于植物免疫逃避和作物保护策略的见解.
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