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生物工程一种植物NLR免疫受体,具有强大的结合接口,对一种保存的真菌病原体效应因子进行结合

Rafał Zdrzałek¹, Yuxuan Xi¹, Thorsten Langner²

¹Department of Biochemistry and Metabolism, John Innes Centre, Norwich NR4 7UH, United Kingdom.

Proceedings of the National Academy of Sciences of the United States of America

|July 5, 2024

概括

科学家们设计了一种大米免疫受体,以检测广泛的爆发性真菌因子,增强植物对疾病的抵抗力. 这种生物工程方法提供了更持久和更强大的作物保护,以防止不断变化的病原体.

科学领域:

植物科学植物科学
分子生物学分子生物学
农业生物技术农业生物技术

背景情况:

植物免疫受体,如核酸结合,富含白素的重复 (NLR) 蛋白质,对于抗病能力至关重要.
目前工程植物免疫的方法面临的挑战是由于植物病原体的快速演变,限制了耐药性的耐用性.
米NLR免疫受体Pik-1识别了来自爆发性真菌Magnaporthe oryzae*的效应体.

研究的目的:

为了生物工程大米Pik-1 NLR免疫受体,以识别多宿主爆发真菌病原体*Magnaporthe oryzae*的保护家族的效应因子.
增强植物疾病耐药性的耐久性和范围,对不断演变的病原体进行抵抗.

主要方法:

改造了Pik-1 NLR受体,通过将其本地集成的重金属相关域替换为假定的宿主目标,OsHIPP43.
创建了一个嵌合体受体,Pikm-1^OsHIPP43,以改变其效应器结合和响应特征.
确定了Pwl2/OsHIPP43复合物的晶体结构,以分析相互作用接口.

主要成果:

设计的Pikm-1^OsHIPP43受体成功地识别了宿主决定因子Pwl2,这是Magnaporthe oryzae的效应因子.
嵌合体受体还对来自不同爆发分离物的其他PWL等位基因做出了反应,表明了广泛的识别.
结构分析揭示了Pwl2和OsHIPP43之间强大而多面的接口,表明它们对突变破坏具有抵抗力.

结论:

生物工程植物免疫受体通过向病原体效应者的宿主目标可以创建具有增强耐用性和广度的识别特异性.
这一策略为自然进化的抗性基因提供了一个有希望的替代方案,用于更强大的作物防护植物病原体.
这些发现为在作物中开发持久的,广泛的抗药性,以对抗诸如大米爆炸等破坏性疾病铺平了道路.

关键词:

在NLR中,它是NLR.集成域名集成域名植物免疫力植物免疫力蛋白质结构蛋白质结构认可是一种认可.

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