An E2-E3 pair contributes to seed size control in grain crops

文献类型： 外文期刊

第一作者： Tang, Sha

作者： Tang, Sha;Zhao, Zhiying;Sui, Yi;Zhang, Dandan;Zhi, Hui;Gao, Yuanzhu;Zhang, Hui;Wang, Yannan;Wang, Ke;He, Qiang;Zhang, Renliang;Zhang, Wei;Jia, Guanqing;Ye, Xingguo;Wu, Chuanyin;Diao, Xianmin;Liu, Xiaotong;Tang, Wenqiang;Liu, Xiaotong;Zhao, Meicheng;Zhang, Linlin;Li, Dongdong

作者机构：

期刊名称：NATURE COMMUNICATIONS （ 影响因子：16.6； 五年影响因子：17.0 ）

ISSN：

年卷期： 2023 年 14 卷 1 期

页码：

收录情况： SCI

摘要： Understanding the molecular mechanisms that regulate grain yield is important for improving agricultural productivity. Protein ubiquitination controls various aspects of plant growth but lacks understanding on how E2-E3 enzyme pairs impact grain yield in major crops. Here, we identified a RING-type E3 ligase SGD1 and its E2 partner SiUBC32 responsible for grain yield control in Setaria italica. The conserved role of SGD1 was observed in wheat, maize, and rice. Furthermore, SGD1 ubiquitinates the brassinosteroid receptor BRI1, stabilizing it and promoting plant growth. Overexpression of an elite SGD1 haplotype improved grain yield by about 12.8% per plant, and promote complex biological processes such as protein processing in endoplasmic reticulum, stress responses, photosystem stabilization, and nitrogen metabolism. Our research not only identifies the SiUBC32-SGD1-BRI1 genetic module that contributes to grain yield improvement but also provides a strategy for exploring key genes controlling important traits in Poaceae crops using the Setaria model system. Researchers identify an E3 ligase SGD1 and its E2 partner responsible for grain yield control using foxtail millet, and reveal its conserved role in wheat, maize, and rice. Furthermore, SGD1 ubiquitinates the brassinosteroid receptor BRI1 thus stabilizing it and promoting grain yield in crops.

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