一个光开关限制了植物免疫中的BTL2介导的植物细胞因子信号传递
Xiao Yu1, Yingpeng Xie2, Dexian Luo3
1Department of Biochemistry & Biophysics, Texas A&M University, College Station, TX 77843, USA; National Key Laboratory of Agricultural Microbiology, Hubei Key Laboratory of Plant Pathology, Hubei Hongshan Laboratory, College of Plant Science and Technology, Huazhong Agricultural University, Wuhan, Hubei 430070, China.
植物免疫共受体BAK1/SERK4被受体激酶BTL2感知. 当共受体的完整性丧失时,BTL2会触发自身免疫和植物细胞因子信号,但BAK1会抑制BTL2以维持平衡.
科学领域:
- 植物免疫力
- 细胞平衡
- 分子信号
背景情况:
- 模式识别受体 (PRR) 和NOD类受体 (NLR) 对植物免疫非常重要.
- 减少BAK1和SERK4共受体,损害模式触发的免疫力,并导致NLR介导的自身免疫力.
- 连接PRR共受体干扰与NLR介导的自身免疫的机制尚未完全理解.
研究的目的:
- 鉴定由BAK1/SERK4消耗引发的自身免疫机制中的因素.
- 阐明受体激酶BTL2在感知免疫共受体完整性的作用.
- 了解BTL2如何调节植物免疫反应并维持细胞平衡.
主要方法:
- 在Arabidopsis中基于RNAi的遗传选.
- 受体激酶 BAK-TO-LIFE 2 (BTL2) 的表征
- 对通道CNGC20激活和植物细胞因子信号通路的分析.
主要成果:
- BTL2被确定为感知BAK1/SERK4完整性的受体激酶.
- 在BAK1/ SERK4受到干扰时,BTL2通过激活Ca2+通道CNGC20诱导自身免疫.
- 与植物细胞因子受体的BTL2复合体,激活NLR并将PRR与NLR免疫结合起来.
- BAK1通过酸化抑制BTL2的激活,从而保持细胞完整性.
结论:
- BTL2 作为 BAK1/ SERK4 免疫共受体的监测静电剂.
- 在共受体扰动时,BTL2促进了NLR介导的植物细胞因子信号传递,以确保植物免疫力.
- 在免疫激活过程中,BAK1- BTL2相互作用对维持细胞平衡至关重要.
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