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-Structure paper
Title | Pathogen effector AvrSr35 triggers Sr35 resistosome assembly via a direct recognition mechanism. |
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Journal, issue, pages | Sci Adv, Vol. 8, Issue 36, Page eabq5108, Year 2022 |
Publish date | Sep 9, 2022 |
Authors | Yan-Bo Zhao / Meng-Xi Liu / Tao-Tao Chen / Xiaomin Ma / Ze-Kai Li / Zichao Zheng / Si-Ru Zheng / Lifei Chen / You-Zhi Li / Li-Rui Tang / Qi Chen / Peiyi Wang / Songying Ouyang / |
PubMed Abstract | Nucleotide-binding, leucine-rich repeat receptors (NLRs) perceive pathogen effectors to trigger plant immunity. The direct recognition mechanism of pathogen effectors by coiled-coil NLRs (CNLs) ...Nucleotide-binding, leucine-rich repeat receptors (NLRs) perceive pathogen effectors to trigger plant immunity. The direct recognition mechanism of pathogen effectors by coiled-coil NLRs (CNLs) remains unclear. We demonstrate that the CNL Sr35 directly recognizes the pathogen effector AvrSr35 from f. sp and report a cryo-electron microscopy structure of Sr35 resistosome and a crystal structure of AvrSr35. We show that AvrSr35 forms homodimers that are disassociated into monomers upon direct recognition by the leucine-rich repeat domain of Sr35, which induces Sr35 resistosome assembly and the subsequent immune response. The first 20 amino-terminal residues of Sr35 are indispensable for immune signaling but not for plasma membrane association. Our findings reveal the direct recognition and activation mechanism of a plant CNL and provide insights into biochemical function of Sr35 resistosome. |
External links | Sci Adv / PubMed:36083908 / PubMed Central |
Methods | EM (single particle) / X-ray diffraction |
Resolution | 2.06 - 3.6 Å |
Structure data | EMDB-33153, PDB-7xe0: EMDB-33486, PDB-7xvg: EMDB-33498, PDB-7xx2: PDB-7xds: |
Chemicals | ChemComp-HOH: ChemComp-ATP: |
Source |
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Keywords | PROTEIN TRANSPORT / Fungus / Effector / Wheat stem rust / PLANT PROTEIN / Plant immunity / NLR / resistosome |