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The rhizobial type III effectors ErnA and Sup3 hijack the SUMOylation pathway to trigger nodule formation in Aeschynomene species

IF 8.1 1区 生物学 Q1 PLANT SCIENCES
New Phytologist Pub Date : 2025-06-22 DOI:10.1111/nph.70334
Fazal Haq, Alicia Camuel, Mélanie Carcagno, Emanuele G. Biondi, Valérie Pacquit, Laurent Deslandes, Eric Giraud, Peter Mergaert
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根瘤菌III型效应物ErnA和Sup3劫持SUMOylation途径，触发七香属植物的根瘤形成
根瘤菌III型效应物（T3Es）通过调控寄主细胞过程促进根瘤菌与豆科植物的共生关系，在根瘤菌与豆科植物的共生关系中起着至关重要的作用。在此之前，我们发现了两种T3Es， ErnA和Sup3，在没有Nod因子的情况下，会在七叶草属植物中引发结瘤。在这里，我们进一步研究了这些T3Es在根瘤共生过程中的作用模式。我们采用蛋白相互作用分析、体外结合和酶活性分析、突变分析和功能结瘤试验来剖析ErnA和Sup3的作用及其与宿主小泛素样修饰物（SUMO）途径（SUMO化）的相互作用。我们证明ErnA在其C端含有一个SUMO相互作用基序（SIM），这促进了它在体外和植物核中与SUMO蛋白的相互作用。此外，我们发现Sup3具有一个C端SUMO蛋白酶结构域，该结构域不仅在体外和细胞核中与SUMO蛋白相互作用，而且还表现出SUMO蛋白酶活性。ErnA中SIM的缺失或Sup3催化位点的突变会破坏它们在鸢尾中引发结瘤的能力。这些发现表明III型分泌系统依赖的共生是通过翻译后的SUMOylation修饰来调节的，ErnA和Sup3调节SUMOylation途径来触发结瘤。
本文章由计算机程序翻译，如有差异，请以英文原文为准。
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来源期刊
New Phytologist
New Phytologist 生物-植物科学
自引率
5.30%
发文量
728
期刊介绍： New Phytologist is an international electronic journal published 24 times a year. It is owned by the New Phytologist Foundation, a non-profit-making charitable organization dedicated to promoting plant science. The journal publishes excellent, novel, rigorous, and timely research and scholarship in plant science and its applications. The articles cover topics in five sections: Physiology & Development, Environment, Interaction, Evolution, and Transformative Plant Biotechnology. These sections encompass intracellular processes, global environmental change, and encourage cross-disciplinary approaches. The journal recognizes the use of techniques from molecular and cell biology, functional genomics, modeling, and system-based approaches in plant science. Abstracting and Indexing Information for New Phytologist includes Academic Search, AgBiotech News & Information, Agroforestry Abstracts, Biochemistry & Biophysics Citation Index, Botanical Pesticides, CAB Abstracts®, Environment Index, Global Health, and Plant Breeding Abstracts, and others.
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