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Updated: May 17, 2025

Identification of Post-translational Modifications of Plant Protein Complexes
Published on: February 22, 2014
RBRL co-opts NINJA for plant defense
1College of Horticulture Science and Engineering, Shandong Agricultural University, Tai-An 271018, Shandong, China.
Rice plants activate broad-spectrum antiviral defenses by recognizing viral coat proteins. This triggers a signaling pathway that releases suppression of jasmonate signaling, initiating immunity.
Area of Science:
- Plant immunity and molecular biology
- Virology and plant-pathogen interactions
Background:
- Antiviral defense in plants relies on signal transmission from infection detection to immunity activation.
- Jasmonate signaling plays a crucial role in plant defense responses, but its suppression can hinder immunity.
Purpose of the Study:
- To identify the key molecular players involved in rice antiviral defense signaling.
- To elucidate the mechanism by which viral infection perception leads to the activation of plant immunity.
Main Methods:
- Investigated the role of RING1-IBR-RING2-type ubiquitin ligase (RBRL) in rice antiviral responses.
- Analyzed the interaction between RBRL and viral coat proteins.
- Examined the effect of RBRL on NINJA3-mediated suppression of jasmonate signaling.
Main Results:
- RBRL directly recognizes viral coat proteins upon infection.
- Recognition of viral coat proteins by RBRL leads to the release of NINJA3-mediated suppression.
- This release initiates broad-spectrum antiviral responses in rice.
Conclusions:
- RBRL acts as a crucial sensor of viral infection in rice.
- The RBRL-mediated pathway is essential for activating plant immunity against viral pathogens.
- This discovery provides a new understanding of plant antiviral defense mechanisms.
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