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Ubiquitination-Mediated Regulation of Brassinosteroid Signaling
Yonghong Xie1,2,3, Qin Zhang1,2,3, Juansheng Ren1,2,3
1Crop Research Institute, Sichuan Germplasm Resource Center, Sichuan Academy of Agricultural Sciences, Chengdu 610066, China.
Plants (Basel, Switzerland)
|August 13, 2026
Summary
Ubiquitination adds a crucial regulatory layer to brassinosteroid (BR) signaling, controlling key protein levels and plant development. This ubiquitin-mediated control fine-tunes plant growth and stress responses.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- Brassinosteroids (BRs) are vital plant steroid hormones regulating growth and environmental adaptation.
- BR signaling was traditionally understood as phosphorylation-dependent.
- Emerging evidence highlights ubiquitination as a key regulatory mechanism in BR pathways.
Purpose of the Study:
- To review recent advances in ubiquitin-mediated regulation of BR signaling.
- To focus on receptor control, proteolytic regulation, and transcriptional modulation.
- To explore connections between ubiquitination, autophagy, and stress responses in plants.
Main Methods:
- Literature review of recent research on BR signaling and ubiquitination.
- Analysis of molecular mechanisms controlling protein abundance and activity.
- Synthesis of findings on the interplay between BR signaling and other pathways.
Main Results:
- Ubiquitination regulates multiple points in BR signaling, including receptor turnover and transcription factor stability.
- It impacts signaling strength, duration, and integration with other hormonal pathways.
- Links between ubiquitination, autophagy, deubiquitination, and stress responses are increasingly evident.
Conclusions:
- Ubiquitination provides a critical regulatory layer for brassinosteroid signaling.
- Understanding these ubiquitin-mediated processes is key to plant development and stress resilience.
- Further research into ubiquitin chain specificity and crop conservation may offer strategies for agricultural improvement.
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