植物信号中的常见共受体的代码依赖功能二分法
Artemis Perraki1,2, Thomas A DeFalco1,3, Paul Derbyshire1
1The Sainsbury Laboratory, Norwich Research Park, Norwich, UK.
Nature
|September 5, 2018
概括
植物受体激酶如BRASSINOSTEROID INSENSITIVE 1-ASSOCIATED KINASE 1 (BAK1) 使用酸化来进行免疫功能,而不是生长调节. 这一发现揭示了控制BAK1活动的代码,并对植物信号的理解产生了广泛的影响.
科学领域:
- 植物分子生物学
- 细胞信号通路
- 受体激酶的调节
背景情况:
- 多细胞生物依赖细胞表面受体激酶进行信号传导.
- 植物受体激酶经常与同受体形成联体诱导的复合体,例如BRASSINOSTEROID INSENSITIVE 1-ASSOCIATED KINASE 1 (BAK1).
- BAK1 是一种关键的共受体,参与植物免疫,生长和发育,与各种富含白的重复受体激酶 (LRR-RKs) 相结合.
研究的目的:
- 阐明管理BAK1功能和LRR-RK的关键监管机制.
- 确定BAK1在植物免疫中的作用至关重要的特定化部位.
- 研究酸化对LRR-RK激活和植物环境反应的更广泛影响.
主要方法:
- 使用蛋白组学来分析蛋白质化模式.
- 在Arabidopsis thaliana中使用向突变,以评估已识别的酸盐的功能意义.
- 对比了酸化对BAK1介导的免疫反应和素受调节的生长.
主要成果:
- 鉴定了BAK1对其免疫功能至关重要的保存酸,但不适用于布拉西诺固醇调节的生长.
- 证明了化在BAK1的C端尾中的关键作用.
- 在许多阿拉比多普西斯LRR-RK中发现了保存的氨酸,可能将它们分为两个功能组.
结论:
- 在其功能中,BAK1表现出酸化依赖的二分法,将免疫信号与生长调节分开.
- 酸化模式作为"代码"来决定BAK1活动的具体结果.
- 这些发现为受体激酶激活和植物对环境线索的反应提供了新的见解,并广泛适用于植物科学.
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