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Updated: May 31, 2026
06:16
mirMachine: A One-Stop Shop for Plant miRNA Annotation
Published on: May 1, 2021
Dehydration-induced condensation of AGO1 modulates miRNA functionality
Hyun Ju Jung1, Tae Rin Oh2, Woorim Yang1
1Department of Systems Biology, Institute of Life Science and Biotechnology, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea.
The Plant Cell
|May 29, 2026
Summary
Plant dehydration tolerance is enhanced by ARGENTAUTE 1 (AGO1) protein phase separation, which temporarily reduces energy-intensive microRNA (miRNA) regulation during drought stress.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- MicroRNAs (miRNAs) regulate gene expression and are crucial for plant responses to environmental stresses like water deficiency.
- The ARGENTAUTE 1 (AGO1) protein is a key component of the miRNA-induced silencing complex, mediating mRNA cleavage or translational repression.
Purpose of the Study:
- To investigate the role of the ARGENTAUTE 1 (AGO1) protein's prion-like domain in plant responses to dehydration.
- To elucidate the mechanism by which AGO1 functions under water-deficient conditions in Arabidopsis thaliana.
Main Methods:
- Analysis of AGO1 protein behavior under dehydration stress in Arabidopsis thaliana.
- Investigating the phenomenon of liquid-liquid phase separation (LLPS) in AGO1.
- Assessing the impact of AGO1 condensation on miRNA regulatory activity and plant dehydration tolerance.
Main Results:
- The prion-like domain of AGO1 facilitates topological changes and liquid-liquid phase separation (LLPS) under dehydration.
- Dehydration-induced AGO1 condensation modulates its activity and enhances plant dehydration tolerance.
- AGO1 condensation is reversible upon rehydration, restoring normal protein levels and miRNA regulation.
Conclusions:
- AGO1 phase separation is an emergent property that helps plants cope with dehydration by attenuating energy-consuming miRNA pathways.
- This mechanism provides a novel insight into plant stress tolerance at the molecular level.
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