Leucine-rich repeat receptor-like gene screen reveals that Nicotiana RXEG1 regulates glycoside hydrolase 12 MAMP detection.

Leucine-rich repeat receptor-like gene screen reveals that Nicotiana RXEG1 regulates glycoside hydrolase 12 MAMP detection.
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富含亮氨酸重复受体样基因筛选揭示烟草RXEG1调节糖苷水解酶12 MAMP检测

DOI:
10.1038/s41467-018-03010-8
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发表时间:
2018-02-09
影响因子:
16.6
通讯作者:
Wang Y
Wang Y
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wang Y;Xu Y;Sun Y;Wang H;Qi J;Wan B;Ye W;Lin Y;Shao Y;Dong S;Tyler BM;Wang Y

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通过膜定位受体激活先天免疫在真核生物中是保守的。植物基因组包含数百个这样的受体样基因,并且编码具有细胞外富含亮氨酸重复(LRR)结构域的蛋白质的那些代表最大的家族。在这里,我们开发了一种高通量的方法来研究LRR受体样基因在全基因组范围内。总共产生了257个基于烟草脆裂病毒的构建体,以靶向本氏烟草中403个鉴定的LRR受体样基因中的386个用于沉默。使用这个工具包,我们确定了LRR受体样蛋白响应XEG1(RXEG1),特异性地识别糖苷水解酶12蛋白XEG1。RXEG1通过质外体中的LRR结构域与XEG1结合,并与LRR受体样激酶BAK1和SOBIR1形成复合物以阻断XEG1诱导的防御信号。因此,这种全基因组沉默测定被证明是一种有效的工具包,以查明新的免疫受体,这将有助于发展持久的抗病性。
Activation of innate immunity by membrane-localized receptors is conserved across eukaryotes. Plant genomes contain hundreds of such receptor-like genes and those encoding proteins with an extracellular leucine-rich repeat (LRR) domain represent the largest family. Here, we develop a high-throughput approach to study LRR receptor-like genes on a genome-wide scale. In total, 257 tobacco rattle virus-based constructs are generated to target 386 of the 403 identified LRR receptor-like genes in Nicotiana benthamiana for silencing. Using this toolkit, we identify the LRR receptor-like protein Response to XEG1 (RXEG1) that specifically recognizes the glycoside hydrolase 12 protein XEG1. RXEG1 associates with XEG1 via the LRR domain in the apoplast and forms a complex with the LRR receptor-like kinases BAK1 and SOBIR1 to transduce the XEG1-induced defense signal. Thus, this genome-wide silencing assay is demonstrated to be an efficient toolkit to pinpoint new immune receptors, which will contribute to developing durable disease resistance.
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