An extracellular network of Arabidopsis leucine-rich repeat receptor kinases.
An extracellular network of Arabidopsis leucine-rich repeat receptor kinases.
复制标题
拟南芥亮氨酸富集的重复受体激酶的细胞外网络。
DOI:
10.1038/nature25184
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发表时间:
2018-01-18
期刊:
影响因子:
64.8
通讯作者:
Belkhadir Y
中科院分区:
文献类型:
--
作者:
Smakowska-Luzan E;Mott GA;Parys K;Stegmann M;Howton TC;Layeghifard M;Neuhold J;Lehner A;Kong J;Grünwald K;Weinberger N;Satbhai SB;Mayer D;Busch W;Madalinski M;Stolt-Bergner P;Provart NJ;Mukhtar MS;Zipfel C;Desveaux D;Guttman DS;Belkhadir Y
Multicellular organisms receive extracellular signals at the surface of a cell by using receptors. The extracellular domains (ECDs) of cell surface receptors serve as interaction platforms, and as regulatory modules of receptor activation. Understanding how interactions between ECDs produce signal-competent receptor complexes is challenging because of their low biochemical tractability. In plants, discovery of ECD interactions is complicated by the massive expansion of receptor families, which creates tremendous potential for changeover in receptor interactions. The largest of these families in Arabidopsis thaliana consists of 225 evolutionarily-related leucine-rich repeat receptor kinases (LRR-RKs), that function in microbe sensing, cell expansion, stomata development and stem cell maintenance. While the principles governing LRR-RK signalling activation are emerging, the systems-level organization of this family of proteins is totally unexplored. To address this, we interrogated 40,000 potential ECD interactions via a sensitized high-throughput interaction assay, and produced an LRR-based Cell Surface Interaction network (CSILRR) comprising 567 interactions. To demonstrate the power of CSILRR for detecting biologically relevant interactions, we predicted and validated the function of uncharacterized LRR-RKs in plant growth and immunity. In addition, we show that CSILRR operates as a unified regulatory network in which the LRR-RKs most critical for its overall structure are required to prevent aberrant signalling of receptors that are several network-steps away. Thus, plants have evolved LRR-RK networks to process extracellular signals into carefully balanced responses.
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