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| 1 | Transcription factors AS1 and AS2 interact with LHP1 to repress KNOX genes in Arabidopsis显示文摘Polycomb group proteins are important repressors of numerous genes in higher eukaryotes. However, the mechanism by which Polycomb group proteins are recruited to specific genes is poorly understood. In Arabidopsis, LIKE HETEROCHROMATIN PROTEIN 1(LHP1), also known as TERMINAL FLOWER 2, was originally proposed as a subunit of polycomb repressive complex 1(PRC1) that could bind the tri-methylated lysine 27 of histone H3(H3K27me3) established by the PRC2. In this work, we show that LHP1 mainly functions with PRC2 to establish H3K27me3, but not with PRC1 to catalyze monoubiquitination at lysine 119 of histone H2 A. Our results show that complexes of the transcription factors ASYMMETRIC LEAVES 1(AS1) and AS2 could help to establish the H3K27me3 modification at the chromatin regions of Class-I KNOTTED1-like homeobox(KNOX) genes BREVIPEDICELLUS andKNAT2 via direct interactions with LHP1. Additionally, our transcriptome analysis indicated that there are probably more common target genes of AS1 and LHP1 besides Class-I KNOX genes during leaf development in Arabidopsis. | Zhongfei Li Bin Li Jian Liu Zhihao Guo Yuhao Liu Yan Li Wen-Hui Shen Ying Huang Hai Huang Yijing Zhang Aiwu Dong | 2016 | Journal of Integrative Plant Biology2016，58，12： | 6 |
| 2 | Special Issue on Plant Epigenetics显示文摘Epigenetics refers to gene regulation at the chromatin level.This can occur via modification of the DNA and the core proteins of the chromatin,histones (Liu et al.,2014).In this issue,Reyes (2014) reviews recent advances in the roles of ATP-dependent chromatin-remodeling complexes on development,phytohormone response,and RNA-mediated silencing and Da Ines et al.(2014) report the role of chromatin remodeling in homologous chromosome pairing.In addition,Over and Michaels (2014) discuss the emergent roles of plant histone linker proteins in gene regulation,cell division,and development. | Xuemei Chen Yijun Qi Z. ReneeSung | 2014 | Molecular Plant2014，7，3： | 0 |
| 3 | Roles of Polycomb complexes in regulating gene expression and chromatin structure in plants显示文摘The evolutionary conserved Polycomb Group(PcG)repressive system comprises two central protein complexes,PcG repressive complex 1(PRC1)and PRC2.These complexes,through the incorporation of histone modifications on chromatin,have an essential role in the normal development of eukaryotes.In recent years,a significant effort has been made to characterize these complexes in the different kingdoms,and despite there being remarkable functional and mechanistic conservation,some key molecular principles have diverged.In this review,we discuss current views on the function of plant PcG complexes.We compare the composition of PcG complexes between animals and plants,highlight the role of recently identified plant PcG accessory proteins,and discuss newly revealed roles of known PcG partners.We also examine the mechanisms by which the repression is achieved and how these complexes are recruited to target genes.Finally,we consider the possible role of some plant PcG proteins in mediating local and long-range chromatin interactions and,thus,shaping chromatin 3D architecture. | Fernando Baile Angeles Gomez-Zambrano Myriam Calonje | 2022 | Plant Communications2022，3，1： | 0 |
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