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研究绘制泛基因组效应蛋白触发免疫图谱
作者:小柯机器人 发布时间:2020/2/17 13:33:27

加拿大多伦多大学David S. Guttman、Darrell Desveaux等研究人员合作报道了宿主与病原体之间的泛基因组效应蛋白触发免疫(ETI)图谱。这一研究成果2020年2月14日发表在国际学术期刊《科学》上。

研究人员构建了丁香假单胞菌III型效应蛋白谱(PsyTEC),从而降低了5127个独特效应蛋白的泛基因组复杂性,这些蛋白分布于494个菌株的70个科中,涉及529个代表性等位基因。研究人员在模式植物拟南芥上筛选了PsyTEC,并从19个科(27.1%)中鉴定出59个ETI引发等位基因(11.2%),直系同源物分布在丁香假单胞菌菌株的96.8%中。研究人员还鉴定了两个未知的宿主免疫受体,包括识别保守的效应蛋白AvrE和HopAA1的CAR1,并发现94.7%的菌株带有被CAR1或ZAR1识别的等位基因。
 
据悉,效应蛋白触发免疫(ETI)是由宿主免疫受体响应响应微生物效应蛋白而引起,可保护植物免受病原体的侵害。但是,目前缺乏ETI抵御不同病原体普遍性的系统研究。
 
附:英文原文

Title: The pan-genome effector-triggered immunity landscape of a host-pathogen interaction

Author: Bradley Laflamme, Marcus M. Dillon, Alexandre Martel, Renan N. D. Almeida, Darrell Desveaux, David S. Guttman

Issue&Volume: 2020/02/14

Abstract: Effector-triggered immunity (ETI), induced by host immune receptors in response to microbial effectors, protects plants against virulent pathogens. However, a systematic study of ETI prevalence against species-wide pathogen diversity is lacking. We constructed the Pseudomonas syringae Type III Effector Compendium (PsyTEC) to reduce the pan-genome complexity of 5127 unique effector proteins, distributed among 70 families from 494 strains, to 529 representative alleles. We screened PsyTEC on the model plant Arabidopsis thaliana and identified 59 ETI-eliciting alleles (11.2%) from 19 families (27.1%), with orthologs distributed among 96.8% of P. syringae strains. We also identified two previously undescribed host immune receptors, including CAR1, which recognizes the conserved effectors AvrE and HopAA1, and found that 94.7% of strains harbor alleles predicted to be recognized by either CAR1 or ZAR1.

DOI: 10.1126/science.aax4079

Source: https://science.sciencemag.org/content/367/6479/763

期刊信息
Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037