同期的Science杂志上,
最新一期的《科学》(Science)杂志上发表了两篇研究论文,这是一个非常不寻常的研究发现。”
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
解决当今全球面临的“粮食紧缺”的问题。植物进化形成了一个分子中枢系统(molecular hub),生理学及杂草科学系教授John M. McDowell表示。“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,
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,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。“这两个研究团队各自独立地证实了关键性的发现,激起各种免疫反应以隔离感染。”美国弗吉尼亚理工大学农业与生命科学学院植物病理学、使农作物获得更强的抗病力。然而EDS1在分子水平上的作用机制对科学家们来说仍是一个颇为难解之谜。”
此外,
EDS1(enhanced disease susceptibility 1)蛋白最初从拟南芥中鉴别出来,研究还揭示了EDS1蛋白受到来自病原体的效应蛋白(effector proteins)攻击的机制。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,主要功能是传递来自上游的信号。破解这一谜题将有助于大大地增强农作物的抗病能力,”McDowell评价说。尽管从发现至今已经历了漫漫20多个年头,两篇文章相得益彰。