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A wheat tandem kinase activates an NLR to trigger immunity

  • Renjie Chen
  • , Jian Chen
  • , Oliver R. Powell
  • , Megan A. Outram
  • , Taj Arndell
  • , Karthick Gajendiran
  • , Yan L. Wang
  • , Jibril Lubega
  • , Yang Xu
  • , Michael A. Ayliffe
  • , Cheryl Blundell
  • , Melania Figueroa
  • , Jana Sperschneider
  • , Thomas Vanhercke
  • , Kostya Kanyuka
  • , Dingzhong Tang
  • , Guitao Zhong
  • , Catherine Gardener
  • , Guotai Yu
  • , Spyridon Gourdoupis
  • Łukasz Jaremko, Oadi Matny, Brian J. Steffenson, Willem H.P. Boshoff, Wilku B. Meyer, Stefan T. Arold, Peter N. Dodds, Brande B.H. Wulff

Research output: Contribution to journalArticlepeer-review

Abstract

The role of nucleotide-binding leucine-rich repeat (NLR) receptors in plant immunity is well studied, but the function of a class of tandem kinases (TKs) that confer disease resistance in wheat and barley remains unclear. In this study, we show that the SR62 locus is a digenic module encoding the Sr62TK TK and an NLR (Sr62NLR), and we identify the corresponding AvrSr62 effector. AvrSr62 binds to the N-terminal kinase 1 of Sr62TK, triggering displacement of kinase 2, which activates Sr62NLR. Modeling and mutation analysis indicated that this is mediated by overlapping binding sites (i) on kinase 1 for binding AvrSr62 and kinase 2 and (ii) on kinase 2 for binding kinase 1 and Sr62NLR. Understanding this two-component resistance complex may help engineering and breeding plants for durable resistance.

Original languageEnglish (US)
Pages (from-to)1402-1408
Number of pages7
JournalScience
Volume387
Issue number6741
DOIs
StatePublished - Mar 28 2025
Externally publishedYes

ASJC Scopus subject areas

  • General

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