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Updated: Jul 31, 2025
10:07
Identification of Post-translational Modifications of Plant Protein Complexes
Published on: February 22, 2014
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Dynamic changes of the Prf/Pto tomato resistance complex following effector recognition
Arsheed H Sheikh1,2, Iosif Zacharia1, Alonso J Pardal1
1School of Life Sciences, University of Warwick, Coventry, CV4 7AL, UK.
Nature Communications
|May 4, 2023
Summary
Nucleotide-binding leucine-rich repeat (NLR) immune receptors activate plant immunity. This study reveals how 14-3-3 proteins and helper NRC proteins link NLR recognition to downstream signaling pathways.
Area of Science:
- Plant immunity
- Molecular mechanisms of plant defense
- Innate immunity signaling
Background:
- Nucleotide-binding leucine-rich repeat (NLR) immune receptors are crucial for plant defense against pathogens.
- NLRs recognize pathogen effectors to trigger effector-triggered immunity (ETI), but downstream signaling mechanisms remain unclear.
Purpose of the Study:
- To elucidate the molecular mechanisms connecting NLR-mediated effector recognition and downstream signaling in plants.
- To identify key protein partners involved in the activation of plant innate immunity.
Main Methods:
- Utilized the well-characterized tomato Prf/Pto NLR resistance complex for investigation.
- Identified interacting protein partners using biochemical and molecular techniques.
Main Results:
- Identified 14-3-3 proteins (TFT1, TFT3) as interacting partners of the Prf/Pto NLR complex and MAPKKKα.
- Discovered helper NLR-required for cell death (NRC) proteins as integral components of the Prf/Pto NLR recognition complex.
- Demonstrated that TFTs and NRCs interact with distinct NLR modules and dissociate upon effector recognition, facilitating downstream signaling.
Conclusions:
- Provided a mechanistic link between NLR immune receptor activation and the initiation of downstream signaling cascades.
- Highlighted the dynamic interaction of TFTs and NRCs with NLR complexes in regulating plant immune responses.
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