Tyrosylprotein sulfotransferase suppresses ABA signaling via sulfation of SnRK2.2/2.3/2.6  

作　　者：Jun Wang Chunyan Wang Tianrun Wang Shizhong Zhang Kang Yan Guodong Yang Changai Wu Chengchao Zheng Jinguang Huang 

机构地区：[1]State Key Laboratory of Crop Biology,College of Life Sciences,Shandong Agricultural University,Taian 271018,China [2]Department of Food Science and Engineering,Shandong Agriculture and Engineering University,Jinan 250100,China

出　　处：《Journal of Integrative Plant Biology》2023年第8期1846-1851,共6页植物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31771878 and 32071931)。

摘　　要：Phytohormone abscisic acid(ABA)plays vital roles in stress tolerance,while long-term overactivation of ABA signaling suppresses plant growth and development.However,the braking mechanism of ABA responses is not clear.Protein tyrosine sulfation catalyzed by tyrosylprotein sulfotransferase(TPST)is a critical post-translational modification.Through genetic screening,we identified a tpst mutant in Arabidopsis that was hypersensitive to ABA.In-depth analysis revealed that TPST could interact with and sulfate SnRK2.2/2.3/2.6,which accelerated their degradation and weakened the ABA signaling.Taken together,these findings uncovered a novel mechanism of desensitizing ABA responses via protein sulfation.

关 键 词：ARABIDOPSIS ABA signaling tyrosylprotein sulfotransferase SULFATION SnRK2.2/2.3/2.6 

分 类 号：Q945[生物学—植物学]