BRI1 and BAK1 interact with G proteins and regulate sugar-responsive growth and development in Arabidopsis

Yuancheng Peng, Liangliang Chen, Shengjun Li, Yueying Zhang, Ran Xu, Zupei Liu, Wuxia Liu, Jingjing Kong, Xiahe Huang, Yingchun Wang, Beijiu Cheng (), Leiying Zheng () and Yunhai Li ()
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Yuancheng Peng: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Liangliang Chen: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Shengjun Li: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yueying Zhang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Ran Xu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Zupei Liu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Wuxia Liu: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Jingjing Kong: Anhui Agricultural University
Xiahe Huang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Yingchun Wang: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences
Beijiu Cheng: Anhui Agricultural University
Leiying Zheng: Chinese Academy of Sciences
Yunhai Li: Institute of Genetics and Developmental Biology, Chinese Academy of Sciences

Nature Communications, 2018, vol. 9, issue 1, 1-13

Abstract: Abstract Sugars function as signal molecules to regulate growth, development, and gene expression in plants, yeasts, and animals. A coordination of sugar availability with phytohormone signals is crucial for plant growth and development. The molecular link between sugar availability and hormone-dependent plant growth are largely unknown. Here we report that BRI1 and BAK1 are involved in sugar-responsive growth and development. Glucose influences the physical interactions and phosphorylations of BRI1 and BAK1 in a concentration-dependent manner. BRI1 and BAK1 physically interact with G proteins that are essential for mediating sugar signaling. Biochemical data show that BRI1 can phosphorylate G protein β subunit and γ subunits, and BAK1 can phosphorylate G protein γ subunits. Genetic analyses suggest that BRI1 and BAK1 function in a common pathway with G-protein subunits to regulate sugar responses. Thus, our findings reveal an important genetic and molecular mechanism by which BR receptors associate with G proteins to regulate sugar-responsive growth and development.

Date: 2018
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DOI: 10.1038/s41467-018-03884-8

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