SMXL5 attenuates strigolactone signaling in Arabidopsis thaliana by inhibiting SMXL7 degradation
作者机构：Department of Botany and Plant SciencesUniversity of CaliforniaRiversideRiversideCA 2521USA Yazhouwan National LaboratorySanya 572025China Hainan Seed Industry LaboratorySanya 57205China State Key Laboratory of Chemo/Biosensing and ChemometricsHunan Provincial Key Laboratory of Plant Functional Genomics and Developmental RegulationCollege of BiologyHunan UniversityChangsha 410082China Key Laboratory of Seed InnovationCenter for Agricultural Resources ResearchInstitute of Genetics and Developmental BiologyChinese Academy of SciencesShijiazhuangHebei 050021China University of Chinese Academy of SciencesBeijing 10004China School of the SciencesBiology DivisionTexas Woman’s UniversityDentonTX 76204USA Centre for Organismal Studies(COS)Heidelberg University6120 HeidelbergGermany
出 版 物：《Molecular Plant》 (分子植物（英文版）)
年 卷 期：2024年第17卷第4期
页 面：631-647页
核心收录：
学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学]
基 金：provided by the National Science Foundation,Division of Integrative Organismal Systems(grants 1737153,1740560,and 1856741)to D.C.N the Hainan Seed Industry Laboratory(grant B23C19701)to Q.L the National Key Research and Development Program of China(grant 2021YFA1300400) the National Natural Science Foundation of China(grant 32070321) the Shenzhen Science and Technology Innovation Commission(grant 2021Szvup037)to R.Y the National Natural Science Foundation of China(grant 32170320) Hebei Natural Science Foundation(grant C2022503003)to L.W the Deutsche Forschungsgemeinschaft(grant GR 2104/9-1)to T.G
主 题：Arabidopsis typically inhibiting
摘 要：Hormone-activated proteolysis is a recurring theme of plant hormone signaling *** strigolactone signaling,the enzyme receptor DWARF14(D14)and an F-box protein,MORE AXILLARY GROWTH2(MAX2),mark SUPPRESSOR OF MAX21-LIKE(SMXL)family proteins SMXL6,SMXL7,and SMXL8 for rapid *** of these transcriptional corepressors initiates downstream growth *** homologous proteins SMXL3,SMXL4,and SMXL5,however,are resistant to MAX2-mediated *** discovered that the smxl4 smxl5 mutant has enhanced responses to ***5 attenuates strigolactone signaling by interfering with AtD14-SMXL7 ***5 interacts with AtD14 and SMXL7,providing two possible ways to inhibit SMXL7 ***5 function is partially dependent on an ethylene-responsive-element binding-factor-associated amphiphilic repression(EAR)motif,which typically mediates interactions with the TOPLESS family of transcriptional ***,we found that loss of the EAR motif reduces SMXL5-SMXL7 interactions and the attenuation of strigolactone signaling by *** hypothesize that integration of SMXL5 into heteromeric SMXL complexes reduces the susceptibility of SMXL6/7/8 proteins to strigolactone-activated degradation and that the EAR motif promotes the formation or stability of these *** mechanism may provide a way to spatially or temporally fine-tune strigolactone signaling through the regulation of SMXL5 expression or translation.
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