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Chemical control of receptor kinase signaling by rapamycin-induced dimerization

Molecular Plant 2021年第8期14卷 1379-1390页

作者： Sara Kim jeonghyang park Byeong Wook Jeon Geonhee Hwang Na Young Kang Yeim We Won-Young park Eunkyoo Oh Jungmook Kim Department of Life Sciences Korea UniversitySeoulKorea Department of Bioenergy Science and Technology Chonnam National UniversityGwangjuKorea Kumho Life Science Laboratory Chonnam National UniversityGwangjuKorea Department of Integrative Food Bioscienee and BiotechnologyChonnam National UniversityGwangjuKorea

Membrane-localized leucine-rich repeat receptor kinases(LRR-RKs)sense diverse extracellular signals,and coordinate and specify cellular functions in ***,functional understanding and identification of the cellular signaling of most LRR-RKs remain a major challenge owing to their genetic redundancy,the lack of ligand information,and subtle phenotypes of LRR-RK ***,we report an engineered rapamycin-inducible dimerization(RiD)receptor system that triggers a receptor-specific LRR-RK signaling independent of their cognate ligands or endogenous *** the RiD-receptors,we demonstrated that the rapamycin-mediated association of chimeric cytosolic kinase domains from the BRI1/BAK1 receptor/co-receptor,but not the BRI1/BRI1 or BAK1/BAK1 homodimer,is sufficient to activate downstream brassinosteroid signaling and physiological ***,we showed that the engineered RiD-FLS2/BAK1 could activate flagellin-22-mediated immune signaling and *** the RiD system,we also identified the potential function of an unkmown orphan receptor in immune signaling and revealed the differential activities of SERK co-receptors of *** results indicate that the RiD method can serve as a synthetic biology tool for precise temporal manipulation of LRR-RK signaling and for understanding LRR-RK biology.

关键词： leucine-rich repeat receptor kinase brassinosteroids BRI1 BAK1 FLS2

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The PRR-EC complex and SWR1 chromatin remodeling complex function cooperatively to repress nighttime hypocotyl elongation by modulating PIF4 expression in Arabidopsis

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Plant Communications 2024年第9期5卷 184-199页

作者： Jin Hoon Won jeonghyang park Hong Gil Lee Sangrae Shim Hongwoo Lee Eunkyoo Oh Pil Joon Seo Department of Chemistry Seoul National UniversitySeoul 08826Republic of Korea Department of Life Sciences Korea UniversitySeoul 02841Republic of Korea Plant Genomics and Breeding Institute Seoul National UniversitySeoul 08826Republic of Korea Department of Forest Resources Kangwon National UniversityChuncheon 24341Republic of Korea

The circadian clock entrained by environmental light-dark cycles enables plants to fine-tune diurnal growth and developmental ***,we show that physical interactions among evening clock components,including PSEUDO-RESPONSE REGULATOR 5(PRR5),TIMING OF CAB EXPRESSION 1(TOC1),and the Evening Complex(EC)component EARLY FLOWERING 3(ELF3),define a diurnal repressive chromatin structure specifically at the PHYTOCHROME-INTERACTING FACTOR 4(PIF4)locus in *** three clock components act interdependently as well as independently to repress nighttime hypocotyl elongation,as hypocotyl elongation rate dramatically increased specifically at nighttime in the prr5-1 toc1-21 elf3-1 mutant,concomitantly with a substantial increase in PIF4 *** repression of PIF4 by ELF3,PRR5,and TOC1 is mediated by the SWI2/SNF2-RELATED(SWR1)chromatin remodeling complex,which incorporates histone H2A.Z at thePIF4 locus,facilitating robust epigenetic suppression ofPIF4 during the ***,these findings demonstrate that the PRR-EC-SWR1 complex represses hypocotyl elongation at night through a distinctive chromatin domain covering PIF4 chromatin.

关键词： hypocotyl elongation circadian clock PRR Evening Complex histone H2A.Z SWR1 complex

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