Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression最新文献_第4页

Roles of dynamic and reversible histone acetylation in plant development and polyploidy 动态和可逆组蛋白乙酰化在植物发育和多倍体中的作用

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.04.007

Z. Jeffrey Chen , Lu Tian

引用次数: 214

rRNA gene silencing and nucleolar dominance: Insights into a chromosome-scale epigenetic on/off switch rRNA基因沉默和核仁优势:对染色体尺度表观遗传开/关开关的见解

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.02.005

Sasha Preuss, Craig S. Pikaard

{"title":"rRNA gene silencing and nucleolar dominance: Insights into a chromosome-scale epigenetic on/off switch","authors":"Sasha Preuss, Craig S. Pikaard","doi":"10.1016/j.bbaexp.2007.02.005","DOIUrl":"10.1016/j.bbaexp.2007.02.005","url":null,"abstract":"<div><p>Ribosomal RNA (rRNA) gene transcription accounts for most of the RNA in prokaryotic and eukaryotic cells. In eukaryotes, there are hundreds (to thousands) of rRNA genes tandemly repeated head-to-tail within nucleolus organizer regions (NORs) that span millions of basepairs. These nucleolar rRNA genes are transcribed by RNA Polymerase I (Pol I) and their expression is regulated according to the physiological need for ribosomes. Regulation occurs at several levels, one of which is an epigenetic on/off switch that controls the number of active rRNA genes. Additional mechanisms then fine-tune transcription initiation and elongation rates to dictate the total amount of rRNA produced per gene. In this review, we focus on the DNA and histone modifications that comprise the epigenetic on/off switch. In both plants and animals, this system is important for controlling the dosage of active rRNA genes. The dosage control system is also responsible for the chromatin-mediated silencing of one parental set of rRNA genes in genetic hybrids, a large-scale epigenetic phenomenon known as nucleolar dominance.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 5","pages":"Pages 383-392"},"PeriodicalIF":0.0,"publicationDate":"2007-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.02.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26670687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 148

Phosphorylation of histone H3 in plants—A dynamic affair 植物组蛋白H3的磷酸化——一个动态事件

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.01.002

Andreas Houben , Dmitri Demidov , Ana D. Caperta , Raheleh Karimi , Francesco Agueci , Liudmila Vlasenko

{"title":"Phosphorylation of histone H3 in plants—A dynamic affair","authors":"Andreas Houben , Dmitri Demidov , Ana D. Caperta , Raheleh Karimi , Francesco Agueci , Liudmila Vlasenko","doi":"10.1016/j.bbaexp.2007.01.002","DOIUrl":"10.1016/j.bbaexp.2007.01.002","url":null,"abstract":"<div><p>Histones are the main protein components of chromatin: they undergo extensive post-translational modifications, particularly acetylation, methylation, phosphorylation, ubiquitination and ADP-ribosylation which modify the structural/functional properties of chromatin. Post-translational modifications of the N-terminal tails of the core histones within the nucleosome particle are thought to act as signals from the chromatin to the cell, for various processes. Thus, in many ways histone tails can be viewed as complex protein–protein interaction surfaces that are regulated by numerous post-translational modifications. Histone phosphorylation has been linked to chromosome condensation/segregation, activation of transcription, apoptosis and DNA damage repair. In plants, the cell cycle dependent phosphorylation of histone H3 has been described; it is hyperphosphorylated at serines 10/28 and at threonines 3/11 during both mitosis and meiosis in patterns that are specifically coordinated in both space and time. Although this post-translational modification is highly conserved, data show that the chromosomal distribution of individual modifications can differ between groups of eukaryotes. Initial results indicate that members of the plant Aurora kinase family have the capacity to control cell cycle regulated histone H3 phosphorylation, and in addition we describe other potential H3 kinases and discuss their functions.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 5","pages":"Pages 308-315"},"PeriodicalIF":0.0,"publicationDate":"2007-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26571389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 128

Polycomb group and trithorax group proteins in Arabidopsis 拟南芥多梳群和三胸群蛋白

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.01.010

Stéphane Pien , Ueli Grossniklaus

{"title":"Polycomb group and trithorax group proteins in Arabidopsis","authors":"Stéphane Pien , Ueli Grossniklaus","doi":"10.1016/j.bbaexp.2007.01.010","DOIUrl":"10.1016/j.bbaexp.2007.01.010","url":null,"abstract":"<div><p><em>Polycomb</em> group (PcG) and <em>trithorax</em> group (trxG) proteins form molecular modules of a cellular memory mechanism that maintains gene expression states established by other regulators. In general, PcG proteins are responsible for maintaining a repressed expression state, whereas trxG proteins act in opposition to maintain an active expression state. This mechanism, first discovered in <em>Drosophila</em> and subsequently in mammals, has more recently been studied in plants. The characterization of several <em>Polycomb</em> Repressive Complex 2 (PRC2) components in <em>Arabidopsis thaliana</em> constituted a first breakthrough, revealing key roles of PcG proteins in the control of crucial plant developmental processes. Interestingly, the recent identification of plant homologues of the <em>Drosophila trithorax</em> protein suggests a conservation of both the PcG and trxG gene regulatory system in plants. Here, we review the current evidence for the role of PcG and trxG proteins in the control of plant development, their biochemical functions, their interplay in maintaining stable expression states of their target genes, and point out future directions which may help our understanding of PcG and trxG function in plants.</p></div>","PeriodicalId":100161,"journal":{"name":"Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression","volume":"1769 5","pages":"Pages 375-382"},"PeriodicalIF":0.0,"publicationDate":"2007-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.bbaexp.2007.01.010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"26607446","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 205

High mobility group proteins of the plant HMGB family: Dynamic chromatin modulators 植物HMGB家族的高迁移率蛋白:动态染色质调节剂

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2006.12.004

Klaus D. Grasser, Dorte Launholt, Marion Grasser

引用次数: 50

Biological consequences of dosage dependent gene regulatory systems 剂量依赖性基因调控系统的生物学后果

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2006.12.002

James A. Birchler, Hong Yao, Siva Chudalayandi

引用次数: 65

Methyl-CpG-binding domain (MBD) proteins in plants 植物中的甲基cpg结合域(MBD)蛋白

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.02.004

Gideon Grafi , Assaf Zemach , Letizia Pitto

引用次数: 50

SWI/SNF chromatin remodeling and linker histones in plants 植物SWI/SNF染色质重塑和连接组蛋白

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2006.12.003

Andrzej Jerzmanowski

引用次数: 124

Epigenetic transitions in plants not associated with changes in DNA or histone modification 植物的表观遗传转变与DNA或组蛋白修饰的变化无关

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.03.002

Taisuke Nishimura , Jerzy Paszkowski

引用次数: 3

Composition of plant telomeres 植物端粒的组成

Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression Pub Date : 2007-05-01 DOI: 10.1016/j.bbaexp.2007.02.001

Barbara Zellinger, Karel Riha

引用次数: 62