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SCOOP10 and SCOOP12 peptides act through MIK2 receptor-like kinase to antagonistically regulate Arabidopsis leaf senescence

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Molecular Plant 2024年第12期17卷 1805-1819页

作者： Zhenbiao Zhang Nora Gigli-Bisceglia Wei Li Saijie Li Jie Wang Junfeng Liu Christa Testerink Yongfeng Guo Tobacco Research Institute Chinese Academy of Agricultural SciencesQingdaoChina Graduate School of Chinese Academy of Agricultural Sciences BeijingChina Laboratory of Plant Physiology Wageningen University&ResearchWageningenthe Netherlands Plant Stress Resilience Institute of Environmental BiologyUtrecht UniversityUtrechtthe Netherlands State Key Laboratory of Maize Bio-breeding Ministry of Agriculture Key Laboratory for Crop Pest Monitoring and Green ControlJoint International Research Laboratory of Crop Molecular BreedingChina Agricultural UniversityBeijingChina

Leaf senescence plays a critical role in a plant’s overall reproductive success due to its involvement in nutrient remobilization and ***,our current understanding of the molecular mechanisms controlling leaf senescence remains *** this study,we show that the receptor-like kinase MALE DISCOVERER 1-INTERACTING RECEPTOR-LIKE KINASE 2(MIK2)functions as a negative regulator of leaf *** found that the SERINE-RICH ENDOGENOUS PEPTIDE 12,previously known to physically interact with MIK2,competes with SCOOP10 to regulate MIK2-dependent leaf *** observed that increased expression of SCOOP10 or the application of exogenous SCOOP10 peptides accelerated leaf senescence in a MIK2-dependent ***,SCOOP12 acted as a suppressor of MIK2-dependent leaf senescence *** assays showed that SCOOP12 enhances while SCOOP10 diminishes MIK2 ***,the SCOOP12-MIK2 module might function antagonistically on SCOOP10-MIK2 signaling at late senescing stages,allowing for fine-tuned modulation of the leaf senescence *** study sheds light on the complex mechanisms underlying leaf senescence and provides valuable insights into the interplay between receptors,peptides,and the regulation of plant senescence.

关键词： leaf senescence MIK2 SCOOP10 SCOOP12 small signaling peptides receptor-like kinase

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Structural Insight into Recognition of Plant Peptid Hormones by Receptors

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Molecular Plant 2016年第11期9卷 1454-1463页

作者： Heqiao Zhang Zhifu Han Wen Song Jijie Chai Innovation Center for Structural Biology Tsinghua-Peking Joint Center for Life Sciences School of Life Sciences Tsinghua University Beijing 100084 China

Secreted signaling peptides or peptide hormones play crucial roles in plant growth and development through coordination of cell-cell communication. Perception of peptide hormones in plants generally relies on membrane-localized receptor kinases （RKs）. Progress has recently been made in structural elucidation of interactions between posttranslationally modified peptide hormones and RKs. The structural studies suggest conserved receptor binding and activation mechanisms of this type of peptide hormones involving their conserved C-termini. Here, we review these structural data and discuss how the conserved mecha- nisms can be used to match peptide-RK pairs.

关键词： peptide hormones small signaling peptides receptor kinases ligand recognition posttranslationalmodifications

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