Histone chaperone networks for new and evicted histones
Histone chaperone networks for new and evicted histones
批准号:
10458694
负责人:
Daniel Richard Foltz
金额:
$33.06万
依托单位国家:
美国
项目类别:
财政年份:
2021
资助国家:
美国
项目状态:
未结题
起止时间:
2021-08-01 至 2025-06-30
关键词:
AcetylationBindingBiologyCellsChromatinChromatin ModelingCoupledCouplingDNADNA AdductsDNA biosynthesisDNA replication forkDataDepositionDiseaseDropsElementsEnzymesGene ExpressionGenetic TranscriptionGenomeHistone H3Histone H4HistonesKnowledgeMetabolic ControlMetabolic PathwayMetabolismModificationMolecularMolecular ChaperonesNuclearNucleosomesNucleotide BiosynthesisNucleotidesOutcomePathway interactionsPopulationPost-Translational Protein ProcessingProcessProtein IsoformsProtein SubunitsProteinsRegulationRoleSECTM1 geneSomatic CellSourceSpecificityStructureTimeTransferaseVariantWorkhistone acetyltransferasehistone modificationnovelnucleotide metabolismpreventreplication stress
中文摘要
项目总结:
--
核糖核酸是由组蛋白和蛋白质包装成三个核小体,从而形成新的染色质,是新的染色质的组装过程。
这不是一个被动的过程,而是需要建立一个由组蛋白-伴侣蛋白组成的复杂网络网络,以促进组蛋白的形成。
稳定,防止组蛋白的聚集,组织组蛋白的运输,促进组蛋白的沉积。组蛋白的监护人必须。
处理新的组蛋白,我们和他们也处理以前存在的组蛋白,这些组蛋白被从染色质中逐出。DNA和复制,。
DNA的转录和对基因组中其他基因控制元件的访问需要核小体不能被移动。
在被移除或被移除的方式之外,导致了对先前存在的组蛋白的驱逐。一些特定的组蛋白可能会起到作用。
为了解决组蛋白H3的选择性配位和配位问题,H3需要进行变异的配位。然而,许多组蛋白的配对和配位是。
不可知论者不知道组蛋白在它们结合后是否存在变异或修饰或状态改变。几乎没有什么信息可以解释它们是如何结合的。
新的NASP和之前存在的NASP的路径可能不同。NASP一直被认为是关键。
组蛋白是组蛋白H3的伴侣,组蛋白是H4的伴侣,它们的功能与组蛋白的变异或变异无关。
翻译后修饰。NASP还与组蛋白乙酰基转移酶和HAT1酶结合,这可能有助于蛋白质的合成。
新的H4和组蛋白的乙酰化程度将在K12结束。这一应用程序的1%将在此期间定义NASP的新的组蛋白相互作用机制。
DNA合成将有助于新的组蛋白的供应。我们的新工作团队也将采取一种不公正的方法来帮助我们订购。
在新的组蛋白沉积过程和组蛋白驱逐过程中,组蛋白-伴侣的相互作用发生了变化。
尚未从染色质中清除的已存在的核小体的伴侣基因途径将在Aim中明确定义。
2%的提案。最后,Aim-3%将定义一种全新的机制,用于组石、供应部门和客户之间的相声测试。
核苷酸与新陈代谢。根据我们在本申请中提出的新工作,我们将首次定义不同的生物过程。
这将规范新组织和先前存在的组织蛋白的命运,并为协调和新陈代谢过程控制提供一种全新的组织范式。
英文摘要
Project Summary
Nuclear DNA is packaged into nucleosomes by histone proteins to create chromatin. The assembly of chromatin
is not a passive process but requires the activity of a network of histone-chaperone proteins that facilitate histone
stability, prevent aggregation, organize histone transport and facilitate their deposition. Histone chaperones must
deal with new histones, and also with pre-existing histones that are evicted from chromatin. DNA replication,
DNA transcription and access to other control elements in the genome require nucleosomes be either moved
out of the way (slid) or removed, resulting in the eviction of pre-existing histones. Specific chaperones contribute
to the selective timing and placement of histone H3 variant deposition. However, many histone chaperones are
agnostic about the variant or modification status of the histones they bind. Very little information exists as to how
the chaperone pathways for new and pre-existing histone differ. NASP has long been appreciated as a key
histone chaperone for histone H3 and histone H4, that functions irrespective of histone variant or
posttranslational modification. NASP also binds the histone acetyltransferase enzyme HAT1 which contribute to
the acetylation of new H4 histones at K12. Aim1 of this application will define novel interactions of NASP during
DNA synthesis that contribute to new histone supply. Our work will also take an unbiased approach to ordering
the process of histone-chaperone interaction during new histone deposition and histone eviction. A novel
chaperone pathway for pre-existing nucleosomes that have been evicted from chromatin will be defined in aim
2 of the proposal. Finally, Aim 3 will define a novel mechanism for crosstalk between histone supply and
nucleotide metabolism. Our work proposed in this application will define, for the first time, differential processes
that regulate fate of new and pre-existing histones and provide a new paradigm for coordinated metabolic control.
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会议论文
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