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-Structure paper
| タイトル | Activation and inhibition mechanisms of a plant helper NLR. |
|---|---|
| ジャーナル・号・ページ | Nature, Vol. 639, Issue 8054, Page 438-446, Year 2025 |
| 掲載日 | 2025年2月12日 |
著者 | Yinyan Xiao / Xiaoxian Wu / Zaiqing Wang / Kexin Ji / Yang Zhao / Yu Zhang / Li Wan / ![]() |
| PubMed 要旨 | Plant nucleotide-binding leucine-rich repeat (NLR) receptors sense pathogen effectors and form resistosomes to confer immunity. Some sensor NLR resistosomes produce small molecules to induce ...Plant nucleotide-binding leucine-rich repeat (NLR) receptors sense pathogen effectors and form resistosomes to confer immunity. Some sensor NLR resistosomes produce small molecules to induce formation of a heterotrimer complex with two lipase-like proteins, EDS1 and SAG101, and a helper NLR called NRG1 (refs. ). Activation of sensor NLR resistosomes also triggers NRG1 oligomerization and resistosome formation at the plasma membrane. We demonstrate that the Arabidopsis AtEDS1-AtSAG101-AtNRG1A heterotrimer formation is stabilized by the AtNRG1A loss-of-oligomerization mutant L134E. We report structures of AtEDS1-AtSAG101-AtNRG1A L134E and AtEDS1-AtSAG101-AtNRG1C heterotrimers with similar assembly mechanisms. AtNRG1A signalling is activated by the interaction with the AtEDS1-AtSAG101 heterodimer in complex with their small-molecule ligand. The truncated AtNRG1C maintains core interacting domains of AtNRG1A but develops further interactions with AtEDS1-AtSAG101 to outcompete AtNRG1A. Moreover, AtNRG1C lacks an N-terminal signalling domain and shows nucleocytoplasmic localization, facilitating its sequestration of AtEDS1-AtSAG101, which is also nucleocytoplasmic. Our study shows the activation and inhibition mechanisms of a plant helper NLR. |
リンク | Nature / PubMed:39939758 |
| 手法 | EM (単粒子) |
| 解像度 | 3.1 Å |
| 構造データ | EMDB-39383, PDB-8yl6: EMDB-39384, PDB-8yl7: |
| 化合物 | ![]() PDB-1l15: |
| 由来 |
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キーワード | IMMUNE SYSTEM/HYDROLASE / Effector-triggered immunity (ETI) / Enhanced Disease Susceptibility1 / Senescence-Associated Gene101 / N Required Gene 1.1 / IMMUNE SYSTEM / IMMUNE SYSTEM-HYDROLASE complex / N Required Gene 1.3 |
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