压力反应激酶级联被保存在阿拉比多普西斯中,并由寄生虫效应因子调节
Parijat S Juvale1, Gennadi Pogorelko2, Gaoyuan Song3
1Morrisville, North Carolina, United States; juvaleparijat@gmail.com.
Molecular plant-microbe interactions : MPMI
|March 11, 2026
概括
在Arabidopsis中发现了一种新的植物激酶级联,类似于人类应激反应途径. 一种线虫寄生虫准了这种级联,揭示了植物寄生虫相互作用和生长防御权衡的新机制.
科学领域:
- 植物分子生物学 植物分子生物学
- 生物化学 生物化学
- 遗传学 遗传学是一种遗传学.
背景情况:
- 激酶级联是真核生物中至关重要的信号通路,参与应激反应.
- 人类和动物中的氧化应激反应激酶 (OSRK) 与植物蛋白共享保存域.
- 植物特异性激酶级联在压力和发育中的功能尚未完全理解.
研究的目的:
- 为了识别和描述Arabidopsis thaliana中的新激酶级联.
- 为了研究这个布的功能性保护与人类/动物对应物.
- 探索这种级联在植物寄生虫相互作用和生长防御权衡中的作用.
主要方法:
- 酵母双杂交和共免疫沉测试以确定蛋白质相互作用.
- 在体外激酶试验分析酸化事件.
- 产生和分析表达线虫效应蛋白的*Arabidopsis thaliana*转基因线.
主要成果:
- 鉴定了一种新型的 *Arabidopsis thaliana* OSRK 类激酶级联 (AtOSRK1-AtWNK5-AtSYP132),其结构和功能与人类路径相似.
- 在AtWNK5酸化和激活AtOSRK1,然后酸化合成素AtSYP132.2.
- 囊线虫效应器Hs28B03针对AtOSRK1,抑制AtSYP132的酸化,导致线虫易感性增加,并改变了植物的生长-防御平衡.
结论:
- 在植物和动物中存在一种受保护的蛋白激酶级联,涉及应激反应和潜在的生长防御权衡.
- 植物寄生性线虫已经进化了效应器,以操纵宿主激酶信号,使其受益.
- 这项研究揭示了一种新的寄生虫机制,影响植物生长和防御策略.
相关概念视频
01:25Cell Signaling in Plants
6.9K
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
6.9K
02:26Defenses Against Pathogens and Herbivores
29.8K
Plants present a rich source of nutrients for many organisms, making it a target for herbivores and infectious agents. Plants, though lacking a proper immune system, have developed an array of constitutive and inducible defenses to fend off these attacks.
29.8K
01:30Other Stress Responses in Bacteria
493
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
493
01:23Stringent Response in E. coli
447
Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
447
01:31Regulation of the Unfolded Protein Response
3.2K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
3.2K
01:17Gene Regulation During Sporulation
614
Sporulation is a complex developmental process that allows certain Gram-positive bacteria, such as Bacillus subtilis and Clostridium species, to survive extreme environmental conditions. This process is tightly regulated by a series of signaling cascades and transcriptional controls, ensuring the formation of a highly resistant endospore.Sporulation is triggered by unfavorable conditions, such as nutrient depletion, and is governed by a phosphorelay system. One of the sensor kinases, such as...
614