How complex are intracellular immune receptor signaling complexes?

How complex are intracellular immune receptor signaling complexes?
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DOI:
10.3389/fpls.2012.00237
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发表时间:
2012
影响因子:
5.6
通讯作者:
Dangl JL
Dangl JL
中科院分区:
生物学2区
文献类型:
--
作者:
Bonardi V;Dangl JL

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核苷酸结合富亮氨酸重复序列蛋白(NLR)是植物细胞内主要的一类免疫受体。NLR通常用于特异性识别病原体效应子,并启动和控制严重限制植物中病原体生长的防御反应(称为效应子触发免疫,或ETI)。尽管许多报道支持在先天免疫中的核心作用,但驱动NLR激活和下游信号传导的分子机制在很大程度上仍然难以捉摸。最近的报道揭示了一些NLR蛋白复合物的前和后激活动力学。最近的技术进步,在使用蛋白质组学可以使高分辨率的定义免疫蛋白复合物和可能的激活相关的翻译后修饰的组件在这些复合物。在这篇综述中,我们专注于研究,旨在表征前和后激活NLR蛋白复合物和分子事件,随后激活。我们讨论了使用新的或改进的技术作为工具来揭示定义NLR介导的病原体识别的分子机制。
Nucleotide binding leucine-rich repeat proteins (NLRs) are the major class of intracellular immune receptors in plants. NLRs typically function to specifically recognize pathogen effectors and to initiate and control defense responses that severely limit pathogen growth in plants (termed effector-triggered immunity, or ETI). Despite numerous reports supporting a central role in innate immunity, the molecular mechanisms driving NLR activation and downstream signaling remain largely elusive. Recent reports shed light on the pre- and post-activation dynamics of a few NLR-containing protein complexes. Recent technological advances in the use of proteomics may enable high-resolution definition of immune protein complexes and possible activation-relevant post-translational modifications of the components in these complexes. In this review, we focus on research aimed at characterizing pre- and post-activation NLR protein complexes and the molecular events that follow activation. We discuss the use of new or improved technologies as tools to unveil the molecular mechanisms that define NLR-mediated pathogen recognition.
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