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Resveratrol Analog ResA1 Targeting MoYpk1 Exhibits Broad-Spectrum Antifungal Activity against Rice Blast
Hongmin Lv1, Huimin Wu2, Lin Li2
1State Key Laboratory for Quality and Safety of Agro-products, Zhejiang Provincial Key Laboratory of Agricultural Microbiomics, Institute of Biotechnology, Zhejiang University, Hangzhou 310058, China.
Abstract:
Rice blast, caused by Magnaporthe oryzae, is a devastating disease that severely threatens global rice production. The rapid emergence of fungicide resistance and environmental concerns necessitates new molecular targets and effective antifungal agents. Here, we identified MoYpk1, an AGC kinase, as a key regulator of M. oryzae pathogenesis and a novel fungicide target. Leveraging the 3D structure of MoYpk1-KD, we performed a structure-based virtual screening of a natural metabolite library and identified resveratrol as an antifungal inhibitor. Furthermore, we developed a resveratrol derivative, resveratrol analog 1 (ResA1), which exhibits significantly enhanced antifungal activity by specifically targeting E381, a previously unrecognized active site of MoYpk1. Importantly, ResA1 displays broad-spectrum antifungal activity against diverse plant pathogenic fungi while being safe for rice and humans. Our work not only elucidates the key role of MoYpk1 in M. oryzae virulence but also validates it as a promising target for the development of sustainable plant-protection strategies.
Insights
Researchers identified a new fungicide target, MoYpk1, to combat rice blast disease. A novel derivative, ResA1, shows broad-spectrum antifungal activity and is safe for crops and humans.
Area of Science:
- Plant Pathology
- Molecular Biology
- Biochemistry
Background:
- Rice blast, caused by *Magnaporthe oryzae*, poses a significant threat to global rice production.
- Fungicide resistance and environmental concerns necessitate novel antifungal strategies and molecular targets.
Purpose of the Study:
- Identify novel molecular targets for controlling *Magnaporthe oryzae*.
- Discover effective and sustainable antifungal agents against plant pathogenic fungi.
Main Methods:
- Identified MoYpk1, an AGC kinase, as a key regulator of *M. oryzae* pathogenesis.
- Utilized structure-based virtual screening of natural metabolites against MoYpk1.
- Developed and tested a resveratrol derivative (ResA1) for antifungal activity.
Main Results:
- MoYpk1 was validated as a novel fungicide target.
- Resveratrol was identified as an inhibitor, and its derivative ResA1 showed enhanced activity.
- ResA1 specifically targets E381 in MoYpk1, demonstrating broad-spectrum antifungal efficacy and safety for rice and humans.
Conclusions:
- MoYpk1 plays a crucial role in *M. oryzae* virulence and is a promising target for new fungicides.
- ResA1 represents a potential sustainable solution for plant disease management with broad-spectrum activity and favorable safety profile.
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