Control of Chromosome Segregation by DNA Topoisomerase II
DNA 拓扑异构酶 II 控制染色体分离
基本信息
- 批准号:10324569
- 负责人:
- 金额:$ 29.29万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2019
- 资助国家:美国
- 起止时间:2019-03-01 至 2023-12-31
- 项目状态:已结题
- 来源:
- 关键词:Advanced DevelopmentAnaphaseAneuploidyAreaBindingBiochemicalC-terminalCancer EtiologyCatalytic DomainCell CycleCell Cycle RegulationCell divisionCellsChromatidsChromosome SegregationChromosomesComplexCongenital AbnormalityDNADNA DamageDNA biosynthesisDataDefectDrug TargetingEnsureEnzymesFailureFeedsFunctional disorderGeneticGenomeGenomic InstabilityGenomicsHumanKinetochoresLightLinkLocalesMalignant NeoplasmsMechanicsMicrotubulesMitosisMitoticMitotic Cell CycleMitotic Spindle ApparatusModelingMolecularMolecular ConformationMonitorNuclear Pore ComplexOutcome StudyPathway interactionsPhasePopulationPositioning AttributeProcessProductionReactionRegulationRoleSHPS-1 proteinSignal TransductionSignaling MoleculeSignaling ProteinSister ChromatidSiteTherapeuticTopoisomerase IITopoisomerase II inhibitionTranslational ResearchYeastsbiochemical toolscancer therapydaughter celldevelopmental diseasegenetic approachinsightmutantnovelprotein protein interactionpublic health relevancerecruitresponsescaffoldsegregationtherapeutic targettooltransmission processtreatment strategy
项目摘要
Abstract
Chromosome segregation errors result in aneuploidy which causes birth defects and cancer. We have
defined a new mitotic Topo II-responsive control (TRC) in yeast that delays the cell cycle when Topo II
activity is insufficient for accurate chromosome segregation. This TRC mechanism is conserved in human
cells, but has not been extensively studied. Activation of the TRC is triggered by defects in the strand
passage reaction of Topo II, when the enzyme transits too slowly through its structural conformations. TRC
activation also requires the catalytically inert C-terminal domain of Topo II, which contains novel protein-
protein interaction motifs that bind to TRC signaling proteins. The central model is that aberrant strand
passage may structurally transfer from the catalytic core of Topo II to the C-terminal domain which functions
as a signal-generating scaffold to halt the cell cycle. The conservation between the human and yeast TRC
responses provides unique opportunities to identify the TRC components and to reveal the mechanism of
TRC activation. We aim to determine the cellular/genomic sites of TRC activation, the signaling molecules
involved and the mechanism of TRC activation by the C-terminal domain of Topo II. The results of these
studies will impact opportunities for translational research because we will identify new potential therapeutic
targets. Our findings will also impact the use of widely prescribed therapeutic drugs that target Topo II
because we will gain mechanistic insight into cellular responses to Topo II inhibition. The preliminary data
and newly developed experimental tools place us in a unique position to determine the conserved
mechanism of this scarcely studied mitotic control.
摘要
染色体分离错误导致非整倍体,从而导致出生缺陷和癌症。我们有
在酵母中定义了一种新的有丝分裂Topo II响应控制(TRC),当Topo II
活性不足以进行精确的染色体分离。这种TRC机制在人类中是保守的。
细胞,但尚未被广泛研究。TRC的激活由链中的缺陷触发
Topo II的通道反应,当酶通过其结构构象过渡太慢时。TRC
激活还需要Topo II的催化惰性C-末端结构域,其含有新的蛋白质-
与TRC信号蛋白结合的蛋白质相互作用基序。核心模型是那条异常链
通道可以在结构上从Topo II的催化核心转移到C-末端结构域,
作为信号产生支架来停止细胞周期。人与酵母TRC的保守性
反应提供了独特的机会,以确定TRC组件,并揭示机制,
TRC激活。我们的目标是确定TRC激活的细胞/基因组位点,信号分子
参与和TRC激活的Topo II的C-末端结构域的机制。的结果予以
研究将影响转化研究的机会,因为我们将确定新的潜在治疗方法,
目标的我们的研究结果也将影响广泛使用的针对Topo II的治疗药物的使用。
因为我们将获得对Topo II抑制的细胞反应的机制性见解。初步数据
新开发的实验工具使我们处于一个独特的位置,以确定保守的
这一机制很少研究有丝分裂控制。
项目成果
期刊论文数量(0)
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DUNCAN J. CLARKE其他文献
DUNCAN J. CLARKE的其他文献
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{{ truncateString('DUNCAN J. CLARKE', 18)}}的其他基金
Identification of Yeast Chromosome Condensation Factors
酵母染色体缩合因子的鉴定
- 批准号:
6696586 - 财政年份:2003
- 资助金额:
$ 29.29万 - 项目类别:
Identification of Yeast Chromosome Condensation Factors
酵母染色体缩合因子的鉴定
- 批准号:
6574828 - 财政年份:2003
- 资助金额:
$ 29.29万 - 项目类别:
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