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The plant immune receptor SNC1 monitors helper NLRs targeted by a bacterial effector

  • Ming Yu Wang
  • , Jun Bin Chen
  • , Rui Wu
  • , Hai Long Guo
  • , Yan Chen
  • , Zhen Ju Li
  • , Lu Yang Wei
  • , Chuang Liu
  • , Sheng Feng He
  • , Mei Da Du
  • , Ya long Guo
  • , You Liang Peng
  • , Jonathan D. G. Jones
  • , Detlef Weigel
  • , Jian-Hua Huang
  • , Wang Sheng Zhu

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Plants deploy intracellular receptors to counteract pathogen effectors that suppress cell-surface-receptor-mediated immunity. To what extent pathogens manipulate intracellular receptor-mediated immunity, and how plants tackle such manipulation, remains unknown. Arabidopsis thaliana encodes three similar ADR1 class helper nucleotide-binding domain leucine-rich repeat receptors (ADR1, ADR1-L1, and ADR1-L2), which are crucial in plant immunity initiated by intracellular receptors. Here, we report that Pseudomonas syringae effector AvrPtoB suppresses ADR1-L1- and ADR1-L2-mediated cell death. ADR1, however, evades such suppression by diversifying into two ubiquitination sites targeted by AvrPtoB. The intracellular sensor SNC1 interacts with and guards the CCR domains of ADR1-L1/L2. Removal of ADR1-L1/L2 or delivery of AvrPtoB activates SNC1, which then signals through ADR1 to trigger immunity. Our work elucidates the long-sought-after function of SNC1 in defense, and also how plants can use dual strategies, sequence diversification, and a multi-layered guard-guardee system, to counteract pathogen's attack on core immunity functions.

Original languageEnglish
Pages (from-to)1792-1803.e7
Number of pages12
JournalCell Host and Microbe
Volume31
Issue number11
DOIs
Publication statusPublished - 8 Nov 2023

Keywords

  • ADR1s
  • E3 ubiquitin ligase
  • effector-triggered immunity
  • helper NLRs
  • plant and microbe interactions
  • plant immunity
  • Pseudomonas effector
  • SNC1

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