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The zinc finger protein DHHC09 S-acylates the kinase STRK1 to regulate H2O2 homeostasis and promote salt tolerance in rice

文献类型： 外文期刊

作者： Tian, Ye 1 ; Zeng, Hui 1 ; Wu, Ji-Cai 1 ; Dai, Gao-Xing 2 ; Zheng, He-Ping 1 ; Liu, Cong 1 ; Wang, Yan 1 ; Zhou, Zheng-Kun 1 ; Tang, Dong-Ying 1 ; Deng, Guo-Fu 2 ; Tang, Wen-Bang 3 ; Liu, Xuan-Ming 1 ; Lin, Jian-Zhong 1 ;

作者机构： 1.Hunan Univ, Coll Biol, Hunan Prov Key Lab Plant Funct Genom & Dev Regulat, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Peoples R China

2.Guangxi Acad Agr Sci, Rice Res Inst, Nanning 530007, Peoples R China

3.Natl Ctr Technol Innovat Saline Alkali Tolerant Ri, Changsha 410125, Peoples R China

4.Hunan Acad Agr Sci, Hunan Hybrid Rice Res Ctr, State Key Lab Hybrid Rice, Changsha 410125, Peoples R China

期刊名称：PLANT CELL （ 影响因子：11.6； 五年影响因子：12.9 ）

ISSN： 1040-4651

年卷期： 2024 年 36 卷 4 期

页码：

收录情况： SCI

摘要： Soil salinity results in oxidative stress and heavy losses to crop production. The S-acylated protein SALT TOLERANCE RECEPTOR-LIKE CYTOPLASMIC KINASE 1 (STRK1) phosphorylates and activates CATALASE C (CatC) to improve rice (Oryza sativa L.) salt tolerance, but the molecular mechanism underlying its S-acylation involved in salt signal transduction awaits elucidation. Here, we show that the DHHC-type zinc finger protein DHHC09 S-acylates STRK1 at Cys5, Cys10, and Cys14 and promotes salt and oxidative stress tolerance by enhancing rice H2O2-scavenging capacity. This modification determines STRK1 targeting to the plasma membrane or lipid nanodomains and is required for its function. DHHC09 promotes salt signaling from STRK1 to CatC via transphosphorylation, and its deficiency impairs salt signal transduction. Our findings demonstrate that DHHC09 S-acylates and anchors STRK1 to the plasma membrane to promote salt signaling from STRK1 to CatC, thereby regulating H2O2 homeostasis and improving salt stress tolerance in rice. Moreover, overexpression of DHHC09 in rice mitigates grain yield loss under salt stress. Together, these results shed light on the mechanism underlying the role of S-acylation in RLK/RLCK-mediated salt signal transduction and provide a strategy for breeding highly salt-tolerant rice.

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