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Jiangbo He,Hua-Jie Zhu,Gui-Fen Luo,Guang-Ming Liu,Yan Li,Hao Chen,Shaopeng Chen,Xin Lu,Guochun Zhou,Yong-Xian Cheng 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.8
The whole plant of Euphorbia helioscopia is an important traditional Chinese medicine. Fom its BuOH soluble extract,one new lactam (1), three new terpenoids (2-4) including a new naturally occurring compound, and three known compounds were isolated. Their structures were identified by spectroscopic evidences. In particular, the absolute configurations of side chain of compounds 1 and 2 were determined using computational methods.
The Monocot-Specific Receptor-like Kinase SDS2 Controls Cell Death and Immunity in Rice
Fan, Jiangbo,Bai, Pengfei,Ning, Yuese,Wang, Jiyang,Shi, Xuetao,Xiong, Yehui,Zhang, Kai,He, Feng,Zhang, Chongyang,Wang, Ruyi,Meng, Xiangzong,Zhou, Jinggeng,Wang, Mo,Shirsekar, Gautam,Park, Chan Ho,Bell Elsevier 2018 Cell host & microbe Vol.23 No.4
<P><B>Summary</B></P> <P>Programmed cell death (PCD) plays critical roles in plant immunity but must be regulated to prevent excessive damage. The E3 ubiquitin ligase SPL11 negatively regulates PCD and immunity in plants. We show that <I>S</I>PL11 cell-<I>d</I>eath <I>s</I>uppressor <I>2</I> (SDS2), an S-domain receptor-like kinase, positively regulates PCD and immunity in rice by engaging and regulating SPL11 and related kinases controlling defense responses. An <I>sds2</I> mutant shows reduced immune responses and enhanced susceptibility to the blast fungus <I>Magnaporthe oryzae</I>. Conversely, <I>SDS2</I> over-expression induces constitutive PCD accompanied by elevated immune responses and enhanced resistance to <I>M. oryzae</I>. SDS2 interacts with and phosphorylates SPL11, which in turn ubiquitinates SDS2, leading to its degradation. In addition, SDS2 interacts with related receptor-like cytoplasmic kinases, OsRLCK118/176, that positively regulate immunity by phosphorylating the NADPH oxidase OsRbohB to stimulate ROS production. Thus, a plasma membrane-resident protein complex consisting of SDS2, SPL11, and OsRLCK118/176 controls PCD and immunity in rice.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The RLK SDS2 positively regulates plant cell death and immunity in rice </LI> <LI> SDS2 phosphorylates E3 ligase SPL11, which in turn ubiquitinates SDS2 for degradation </LI> <LI> SDS2 phosphorylates receptor-like cytoplasmic kinases RLCK118 </LI> <LI> RLCK118 interacts with and phosphorylates the NADPH oxidase OsRbohB </LI> </UL> </P> <P><B>Graphical Abstract</B></P> <P>[DISPLAY OMISSION]</P>