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| 1 | Recent Advances in the Regulation of Brassinosteroid Signaling and Biosynthesis Pathways显示文摘Brassinosteroids(BRs) play important roles in plant growth,develop-ment and responses to environmental cues.BRs signal through plasma membrane receptor BRI1 and co-receptor BAK1,and several positive(BSK1,BSU1,PP2A) and negative(BKI1,BIN2 and 14-3-3) regulators to control the activities of BES1 and BZR1 family transcription factors,which regulate the expression of hundreds to thousands of genes for various BR responses.Recent studies identified novel signaling components in the BR pathways and started to establish the detailed mechanisms on the regulation of BR signaling.In addition,the molecular mechanism and transcriptional network through which BES1 and BZR1 control gene expression and various BR responses are beginning to be revealed.BES1 recruits histone demethylases ELF6 and REF6 as well as a transcription elongation factor IWS1 to regulate target gene expression.Identification of BES1 and BZR1 target genes established a transcriptional network for BR response and crosstalk with other signaling pathways.Recent studies also revealed regulatory mechanisms of BRs in many developmental processes and regulation of BR biosynthesis.Here we provide an overview and discuss some of the most recent progress in the regulation of BR signaling and biosynthesis pathways. | Huaxun Ye Lei Li Yanhai Yin | 2011 | Journal of Integrative Plant Biology2011，53，6： | 21 |
| 2 | Ligand Perception,Activation,and Early Signaling of Plant Steroid Receptor Brassinosteroid Insensitive 1显示文摘Leucine-rich repeat receptor-like kinases(LRR-RLKs)belong to a large group of cell surface proteins involved in many aspects of plant development and environmental responses in both monocots and dicots.Brassinosteroid insensitive 1(BRI1),a member of the LRR X subfamily,was frst identifed through several forward genetic screenings for mutants insensitive to brassinosteroids(BRs),which are a class of plant-specifc steroid hormones.Since its identifcation,BRI1 and its homologs had been proved as receptors perceiving BRs and initiating BR signaling.The co-receptor BRI1-associated kinase 1and its homologs,and other BRI1 interacting proteins such as its inhibitor BRI1 kinase inhibitor 1(BKI1)were identifed by genetic and biochemical approaches.The detailed mechanisms of BR perception by BRI1 and the activation of BRI1receptor complex have also been elucidated.Moreover,several mechanisms for termination of the activated BRI1 signaling were also discovered.In this review,we will focus on the recent advances on the mechanism of BRI1 phosphorylation and activation,the regulation of its receptor complex,the structure basis of BRI1ectodomain and BR recognition,its direct substrates,and the termination of the activated BRI1 receptor complex. | Jianjun JiangWang Chi ZhangWang Xuelu Wang | 2013 | Journal of Integrative Plant Biology2013，55，12： | 6 |
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