DWARF 53 acts as a repressor of strigolactone signalling in rice

文献类型： 外文期刊

第一作者： Jiang, Liang

作者： Jiang, Liang;Liu, Xue;Xiong, Guosheng;Liu, Huihui;Chen, Fulu;Wang, Lei;Meng, Xiangbing;Liu, Guifu;Yu, Hong;Yuan, Yundong;Wang, Yonghong;Li, Jiayang;Jiang, Liang;Liu, Xue;Xiong, Guosheng;Liu, Huihui;Chen, Fulu;Wang, Lei;Meng, Xiangbing;Liu, Guifu;Yu, Hong;Yuan, Yundong;Wang, Yonghong;Li, Jiayang;Yi, Wei;Zhao, Lihua;Ma, Honglei;Xu, H. Eric;He, Yuanzheng;Wu, Zhongshan;Melcher, Karsten;Xu, H. Eric;Qian, Qian

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期刊名称：NATURE （ 影响因子：49.962； 五年影响因子：54.637 ）

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收录情况： SCI

摘要： Strigolactones (SLs) are a group of newly identified plant hormones that control plant shoot branching. SL signalling requires the hormone-dependent interaction of DWARF 14 (D14), a probable candidate SL receptor, with DWARF 3 (D3), an F-box component of the Skp-Cullin-F-box (SCF) E3 ubiquitin ligase complex. Here we report the characterization of a dominant SL-insensitive rice (Oryza sativa) mutant dwarf 53 (d53) and the cloning of D53, which encodes a substrate of the SCF~(D3) ubiquitination complex and functions as a repressor of SL signalling. Treatments with GR24, a synthetic SL analogue, cause D53 degradation via the proteasome in a manner that requires D14 and the SCF~(D3) ubiquitin ligase, whereas the dominant form of D53 is resistant to SL-mediated degradation. Moreover, D53 can interact with transcriptional co-repressors known as TOPLESS-RELATED PROTEINS. Our results suggest a model of SL signalling that involves SL-dependent degradation of the D53 repressor mediated by the D14-D3 complex.

分类号： N

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