How transcription disrupts genome 3D organization
How transcription disrupts genome 3D organization
批准号:
10390097
负责人:
SVEN W HEINZ
金额:
$3.6万
依托单位国家:
美国
项目类别:
财政年份:
2020
资助国家:
美国
项目状态:
已结题
起止时间:
2020-01-01 至 2023-12-31
关键词:
3-DimensionalAcuteAddressAgingArchitectureBindingBinding SitesCell LineCell NucleusCellsCharacteristicsChromatinChromatin StructureChromosomesCollaborationsCommunicable DiseasesComplexDataDevelopmentDiseaseENG geneEpigenetic ProcessGene ExpressionGene Expression RegulationGene StructureGenesGenetic TranscriptionGenomeGenomic SegmentHourInfectionInfluenza A virusInterphaseKineticsKnowledgeLaboratoriesLinkMalignant NeoplasmsMediatingMethodsModelingMolecularMolecular ConformationMutationOrganizational ChangePlayProcessProteinsRNA Polymerase IIResearchRoleShapesStimulusStructureSystemTestingTranscription ElongationTranscription InitiationViralWorkcell typecohesinepigenomeepigenomicsexperimental studygenetic informationgenome-widein vivoinsightloss of functionparent grantprogramsprotein complexprotein degradationtermination factorthree dimensional structuretranscription terminationtranscriptomics
中文摘要
标题:
转录如何扰乱基因组3D组织
摘要(摘自家长赠款,R01 GM129532):
染色质在细胞核内的3D包装在调控基因表达方面起着重要作用。而当
我们知道,基因组如何在细胞核内折叠的原理越来越清楚
关于驱动基因组3D结构动态变化的机制,例如在
差异化。我们最近发现,甲型流感感染抑制转录终止,导致
通读转录通常延伸数百个千碱基,超过基因的3‘端。抄写:
这些区域扰乱了局部粘附素介导的染色质相互作用,导致染色质分解和
频繁地诱导先前不活跃的基因组区域切换到活跃的隔室。这些
隔室变化在几个小时内发生,并且在没有表观遗传变化的情况下发生,这通常是
发现与一个基因座的隔室关联相关。进一步的基因转录分析显示,
粘附素丢失与RNA聚合酶II到达粘附素结合部位在时间上密切相关,这表明
RNA聚合酶II本身参与了从染色质中取代粘附素的过程。为了详细研究这些现象,
我们将全面描述普遍通读的表观遗传和转录效应。
变性标记的细胞系作为转录诱导的基因组3D结构变化的替代模型,以及
检测基因结构对确定RNA聚合酶II转录改变基因组的作用
组织。在另一组实验中,我们将使用一种候选方法来识别与
转录相关的粘附素卸载。这些研究将有助于揭示转录如何影响
染色质相互作用和增加我们对动态重组基因组3D的机制的了解
组织。
英文摘要
Title:
How transcription disrupts genome 3D organization
Abstract (From parent grant, R01 GM129532):
The 3D packaging of chromatin within the nucleus plays an important role in regulating gene expression. While
the principles of how the genome is folded in the nucleus are increasingly well understood, we know
remarkably little about the mechanisms that drive dynamic changes in genome 3D structure, e.g. during
differentiation. We recently discovered that influenza A infection inhibits transcription termination, resulting in
read-through transcription often extends hundreds of kilobases past the 3’ ends of genes. Transcription of
these regions disrupts local cohesin-mediated chromatin interactions, leads to chromatin decompaction and
frequently induces switching of previously inactive genome regions to the active compartment. These
compartment changes occur in a matter of hours, and in the absence of epigenetic changes, which usually are
found to correlate with compartment association of a locus. Further analysis of genic transcription revealed that
cohesin loss is closely temporally linked to RNA polymerase II arrival at cohesin binding sites, suggesting that
RNA polymerase II itself is involved in displacing cohesin from chromatin. To study these phenomena in detail,
we will comprehensively characterize the epigenetic and transcriptional effects of pervasive read-through in
degron-tagged cell lines as an alternative model for transcription-induced genome 3D structure changes, and
test the contribution of gene structure to delimiting where RNA polymerase II transcription changes genome
organization. In a separate set of experiments, we will use a candidate approach to identify proteins involved in
transcription-associated cohesin unloading. These studies will help reveal how transcription influences
chromatin interaction and increase our knowledge of the mechanisms that dynamically reorganize genome 3D
organization.
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How transcription disrupts genome 3D organization
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批准号:9888261
-
项目类别:
-
资助金额:$31.5万
-
财政年份:2020
-
负责人:SVEN W HEINZ
-
依托单位:
How transcription disrupts genome 3D organization
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批准号:10312025
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项目类别:
-
资助金额:$31.6万
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财政年份:2020
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负责人:SVEN W HEINZ
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依托单位:
How transcription disrupts genome 3D organization
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批准号:10078952
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项目类别:
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资助金额:$31.55万
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财政年份:2020
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负责人:SVEN W HEINZ
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依托单位:
How transcription disrupts genome 3D organization
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批准号:10538566
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项目类别:
-
资助金额:$31.6万
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财政年份:2020
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负责人:SVEN W HEINZ
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依托单位:
Molecular and genetic analysis of DP103
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批准号:7388184
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项目类别:
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资助金额:$5.2万
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财政年份:2006
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负责人:SVEN W HEINZ
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依托单位:
Molecular and genetic analysis of DP103
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批准号:7056323
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项目类别:
-
资助金额:$5.04万
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财政年份:2006
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负责人:SVEN W HEINZ
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依托单位:
Epigenetic & Genomics
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批准号:10454982
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项目类别:
-
资助金额:$19.58万
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财政年份:2002
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负责人:SVEN W HEINZ
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依托单位:
Epigenetic & Genomics
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批准号:10176469
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项目类别:
-
资助金额:$19.75万
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财政年份:2002
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负责人:SVEN W HEINZ
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依托单位:
海外基金