共查询到20条相似文献,搜索用时 31 毫秒
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Kim JM To TK Ishida J Morosawa T Kawashima M Matsui A Toyoda T Kimura H Shinozaki K Seki M 《Plant & cell physiology》2008,49(10):1580-1588
Post-translational modification of histone N-tails affects eukaryotic gene activity. In Arabidopsis, the histone modification level correlates with gene activation and repression in vernalization and flowering processes, but there is little information on changes in histone modification status and nucleosome structure under abiotic stresses. We determined the temporal and spatial changes in nucleosome occupancy and levels of H3K4me3, H3K9ac, H3K14ac, H3K23ac and H3K27ac in the histone H3 N-tail on the regions of four Arabidopsis drought stress-inducible genes, RD29A, RD29B, RD20 and At2g20880 [corrected], under drought stress conditions by chromatin immunoprecipitation analysis. We found two types of regulatory mechanisms of nucleosome occupancy function in the drought stress response. For RD29A and RD29B genes, nucleosome occupancy of promoter regions is low compared with that of coding regions, and no notable nucleosome loss occurs under drought stress. In contrast, nucleosome density is gradually decreased in response to drought stress on RD20 and At2g20880 [corrected] genes. Enrichments of H3K4me3 and H3K9ac correlate with gene activation in response to drought stress in all four genes. Interestingly, establishment of H3K4me3 occurs after accumulation of RNAPII on the coding regions of RD29A and At2g20880 [corrected]. Enrichment of H3K23ac and H3K27ac occurs in response to drought stress on the coding regions of RD29B, RD20 and At2g20880 [corrected], but not on the coding region of At2g20880 [corrected]. Our results indicate that histone modifications on the H3 N-tail are altered with gene activation on the coding regions of drought stress-responsive genes under drought stress conditions and that several patterns of nucleosome changes function in the drought stress response. 相似文献
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Roudier F Ahmed I Bérard C Sarazin A Mary-Huard T Cortijo S Bouyer D Caillieux E Duvernois-Berthet E Al-Shikhley L Giraut L Després B Drevensek S Barneche F Dèrozier S Brunaud V Aubourg S Schnittger A Bowler C Martin-Magniette ML Robin S Caboche M Colot V 《The EMBO journal》2011,30(10):1928-1938
Post-translational modification of histones and DNA methylation are important components of chromatin-level control of genome activity in eukaryotes. However, principles governing the combinatorial association of chromatin marks along the genome remain poorly understood. Here, we have generated epigenomic maps for eight histone modifications (H3K4me2 and 3, H3K27me1 and 2, H3K36me3, H3K56ac, H4K20me1 and H2Bub) in the model plant Arabidopsis and we have combined these maps with others, produced under identical conditions, for H3K9me2, H3K9me3, H3K27me3 and DNA methylation. Integrative analysis indicates that these 12 chromatin marks, which collectively cover ~90% of the genome, are present at any given position in a very limited number of combinations. Moreover, we show that the distribution of the 12 marks along the genomic sequence defines four main chromatin states, which preferentially index active genes, repressed genes, silent repeat elements and intergenic regions. Given the compact nature of the Arabidopsis genome, these four indexing states typically translate into short chromatin domains interspersed with each other. This first combinatorial view of the Arabidopsis epigenome points to simple principles of organization as in metazoans and provides a framework for further studies of chromatin-based regulatory mechanisms in plants. 相似文献
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Diurnal changes in the histone H3 signature H3K9ac|H3K27ac|H3S28p are associated with diurnal gene expression in Arabidopsis
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Katja Baerenfaller Huan Shu Matthias Hirsch‐Hoffmann Johannes Fütterer Lennart Opitz Hubert Rehrauer Lars Hennig Wilhelm Gruissem 《Plant, cell & environment》2016,39(11):2557-2569
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The histone-like NF-Y is a bifunctional transcription factor 总被引:1,自引:0,他引:1
Ceribelli M Dolfini D Merico D Gatta R Viganò AM Pavesi G Mantovani R 《Molecular and cellular biology》2008,28(6):2047-2058
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