数字农科院2.0

Mapping the Phosphorylation Regulatory Network of Single-Celled Fibre Elongation Mediated by GhBIN2 in Cotton

文献类型： 外文期刊

作者： Liu, Le;Yu, Mengli;Wang, Longfei;Qanmber, Ghulam;Fan, Liqiang;Li, Yujun;Liu, Zhao;Wang, Xuwen;Liu, Li;Li, Fuguang;Jin, Shuangxia;Yang, Zuoren

作者机构：

关键词： 4D-fastDIA quantitative phosphoproteomics;Brassinosteroids;cotton fibre;GhBIN2

期刊名称： PLANT BIOTECHNOLOGY JOURNAL

ISSN： 1467-7644

年卷期： 2025 年

页码：

收录情况： SCIE（2025版）

摘要： Protein phosphorylation plays a pivotal role in cellular signal transduction and plant development. The plant steroid hormone Brassinosteroids (BRs) signal transduction relies primarily on protein kinase-mediated phosphorylation cascades. However, the specific mechanisms of phosphorylation regulation in BR signalling remain to be fully elucidated. This study focuses on BIN2, an indispensable protein kinase in the BR signalling pathway, utilising single-celled cotton fibre to investigate the mechanisms by which phosphorylation regulates cell elongation. Firstly, we confirmed the inhibitory role of GhBIN2 in fibre elongation through its overexpression. Subsequently, we employed 4D-fastDIA quantitative phosphoproteomics and proteomics analysis to map the GhBIN2-mediated phosphorylation regulatory network. Through a comprehensive analysis of this network, we identified six credible substrates of GhBIN2. Further investigation revealed that GhBIN2 interacts with substrate GhIQD14 and increases its abundance through phosphorylation to negatively regulate fibre elongation. This study deepens the understanding of BR signalling in cotton fibre elongation and provides experimental evidence and new insights for comprehending the regulatory role of protein phosphorylation in plant cell elongation processes.

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