Phytopathogen Effectors Use Multiple Mechanisms to Manipulate Plant Autophagy
Neeraj K Lal1, Burinrutt Thanasuwat1, Pin-Jui Huang1
1Department of Plant Biology and the Genome Center, College of Biological Sciences, University of California, Davis, CA 95616, USA.
Cell Host & Microbe
|August 19, 2020
Summary
Plant pathogens manipulate autophagy, a key immune process, using various effector proteins. Understanding these interactions reveals how pathogens exploit autophagy for infection and highlights its complex role in plant immunity.
Area of Science:
- Plant immunity and molecular mechanisms
- Cellular processes and pathogen interactions
Background:
- Autophagy is a crucial component of plant immunity.
- Pathogens frequently target autophagy, but molecular details are unclear.
- Understanding pathogen manipulation of autophagy is vital for plant defense.
Purpose of the Study:
- To elucidate the molecular mechanisms by which plant pathogens manipulate autophagy.
- To identify specific pathogen effectors that interact with Arabidopsis autophagy (ATG) proteins.
Main Methods:
- Identified a network of 88 interactions between 184 pathogen effectors and 25 Arabidopsis ATG proteins.
- Investigated specific effector strategies from Pseudomonas syringae pv tomato (Pto).
Main Results:
- Discovered distinct molecular strategies used by Pto effectors (HrpZ1, HopF3, AvrPtoB) to modulate autophagy.
- HrpZ1 enhances autophagy via ATG4b and ATG8, while HopF3 suppresses autophagy by targeting ATG8.
- AvrPtoB impacts ATG1 kinase phosphorylation, increasing bacterial virulence.
Conclusions:
- Autophagy is a significant target for pathogen effectors during infection.
- Pathogen-induced enhancement and suppression of autophagy suggest diverse roles throughout infection.
- Precise temporal regulation of autophagy is essential for successful pathogen infection.
Keywords:
ATG1ATG8ArabidopsisAvrPtoBHopF3HrpZ1Pseudomonas syringaeautophagyeffectorsimmunitypathogensMore Related Videos
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