最新一期的《科学》(Science)杂志上发表了两篇研究论文,
EDS1(enhanced disease susceptibility 1)蛋白最初从拟南芥中鉴别出来,分别由来自美国和德国的研究人员领导的两个国际研究小组揭示了EDS1激活植物免疫系统不同元件的机制。两篇文章相得益彰。”
Pathogen Effectors Target Arabidopsis EDS1 and Alter Its Interactions with Immune Regulators
Saikat Bhattacharjee, Morgan K. Halane, Sang Hee Kim, Walter Gassmann
Plant resistance proteins detect the presence of specific pathogen effectors and initiate effector-triggered immunity. Fewimmune regulators downstream of resistance proteins have been identified, none of which are known virulence targets of effectors.We show that Arabidopsis ENHANCED DISEASE SUSCEPTIBILITY1 (EDS1), a positive regulator of basal resistance and of effector-triggered immunity specificallymediated by Toll–interleukin-1 receptor–nucleotide binding–leucine-rich repeat (TIR-NB-LRR) resistance proteins, forms proteincomplexes with the TIR-NB-LRR disease resistance proteins RPS4 and RPS6 and with the negative immune regulator SRFR1 at acytoplasmic membrane. Further, the cognate bacterial effectors AvrRps4 and HopA1 disrupt these EDS1 complexes. Tight associationof EDS1 with TIR-NB-LRR–mediated immunity may therefore derive mainly from being guarded by TIR-NB-LRR proteins, and activationof this branch of effector-triggered immunity may directly connect to the basal resistance signaling pathway via EDS1.
文献链接:https://www.sciencemag.org/content/334/6061/1405.abstract
“这一新研究发现为预测病毒的作用机制提供了重要数据,
长期以来科学家们都认为EDS1蛋白处于植物免疫系统防御第一线的下游段,“尽管目前对于监控蛋白如何激活抗菌反应还不是很清楚,McDowell 说:“这两篇文章均证实EDS1在植物细胞中与监控蛋白(surveillance proteins)产生了物理互作,
科学家破解20年“EDS1参与植物免疫”之谜
2011-12-13 13:15 · milliegu最新一期的《科学》(Science)杂志上发表了两篇研究论文,”
此外,后被证实是植物中广泛抵御病原体感染的一种重要蛋白质。
同期的Science杂志上,植物进化形成了一个分子中枢系统(molecular hub),并且EDS1似乎参与激活了来自植物细胞不同区室的不同免疫反应。研究人员观察到了丁香假单胞杆菌穿越植物细胞壁,