RECQ5-dependent SUMO2 conjugation of PCNA in the resolution of transcription-replication conflicts
PCNA 的 RECQ5 依赖性 SUMO2 缀合解决转录复制冲突
基本信息
- 批准号:10328909
- 负责人:
- 金额:$ 38.78万
- 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:2019-02-01 至 2024-01-31
- 项目状态:已结题
- 来源:
- 关键词:Biological AssayBiologyBypassCell DeathCellsChromatinChromosome Fragile SitesComplexConflict (Psychology)DNADNA DamageDNA Double Strand BreakDNA Sequence RearrangementDNA biosynthesisDNA lesionDNA replication forkDNA-Directed DNA PolymeraseDataDefectDepositionEventFractionationFrequenciesGenesGenetic TranscriptionGenomic InstabilityGoalsHematopoietic NeoplasmsHistonesHumanIn VitroKnockout MiceLeadLinkLysineMalignant NeoplasmsMediatingMetabolicModelingModificationMolecularMolecular ChaperonesNeoplastic Cell TransformationPathogenesisProliferating Cell Nuclear AntigenProteinsProteomicsPublishingRECQL5 geneRNARNA Polymerase IIResolutionRisk FactorsRoleS phaseSiteSolid NeoplasmSourceSumoylation PathwayTranscriptional RegulationTumor Suppressor ProteinsWorkXenograft procedurebasecancer cellcancer riskcancer typecell growthcell transformationconflict resolutionhelicasehomologous recombinationin vitro Assayinnovationmembermouse modelnovelpreventrecruitresponsetranscriptomeubiquitin-protein ligase
项目摘要
Project Summary
Proliferating cell nuclear antigen (PCNA) is an essential component of the replisome, and it enhances the
processivity of the DNA polymerases in DNA synthesis. In addition, in response to DNA damage, PCNA is
ubiquitinated at lysine 164 (K164) to bypass DNA lesions. In unperturbed cells, the same K164 residue can
also be conjugated with either SUMO1 or SUMO2, and SUMO1-PCNA has been implicated in recruiting PARI
helicase to suppress homologous recombination. However, the source of replication obstacle that triggers
PCNA SUMOylation is yet to be defined, and the regulators of PCNA SUMOylation are not known. It is also not
clear if SUMO2-PCNA functions redundantly to SUMO1-PCNA. Our newly published data argue that human
SUMO2-PCNA has a unique function in transcription that is not shared by SUMO1-PCNA, because only
SUMO2-PCNA is associated with transcriptionally active chromatin. Even though PCNA SUMO2 conjugation
occurs in S-phase, SUMO2-PCNA is induced by RNA polymerase II - dependent transcription and requires the
RNA polymerase II - interacting protein, RECQ5 DNA helicase. Importantly, cells with reduced SUMO2-PCNA
accumulate transcription-induced DNA double-strand breaks during S-phase. Therefore, our data support a
conceptually innovative model for a role of SUMO2-PCNA in resolving transcription-replication conflicts to
minimize genomic instability. The goal of this proposal is (1) to identify the molecular factors that facilitate the
transcription-induced SUMO2 conjugation of PCNA, (2) to identify the molecular mechanism by which SUMO2-
PCNA resolves transcription-replication conflicts, and (3) to elucidate the contribution of SUMO2-PCNA toward
preventing genomic instability and neoplastic transformation, as transcription-replication conflicts are major
source for common fragile site instability.
项目摘要
增殖细胞核抗原(PCNA)是复制体的重要组成部分,它增强了细胞的增殖。
DNA聚合酶在DNA合成中的持续合成能力。此外,作为对DNA损伤的反应,PCNA
在赖氨酸164(K164)处泛素化以绕过DNA损伤。在未受干扰的细胞中,相同的K164残基可以
也与SUMO 1或SUMO 2结合,SUMO 1-PCNA与PARI的募集有关
解旋酶以抑制同源重组。然而,引发复制障碍的根源
PCNA SUMO化尚未被定义,并且PCNA SUMO化的调节因子也不清楚。也不
明确SUMO 2-PCNA是否与SUMO 1-PCNA功能冗余。我们新发布的数据表明,人类
SUMO 2-PCNA在转录中具有SUMO 1-PCNA所不具有的独特功能,因为只有
SUMO 2-PCNA与转录活性染色质相关。尽管PCNA SUMO 2结合
发生在S期,SUMO 2-PCNA由RNA聚合酶II依赖性转录诱导,需要
RNA聚合酶II相互作用蛋白,RECQ 5 DNA解旋酶。重要的是,SUMO 2-PCNA降低的细胞
在S期积累转录诱导的DNA双链断裂。因此,我们的数据支持
SUMO 2-PCNA在解决转录-复制冲突中的作用的概念性创新模型,
最小化基因组不稳定性。本提案的目标是(1)确定促进免疫的分子因素
转录诱导的SUMO 2结合PCNA,(2)以确定SUMO 2-
PCNA解决了转录-复制冲突,(3)阐明SUMO 2-PCNA对
防止基因组不稳定性和肿瘤转化,因为转录-复制冲突是主要的
常见脆性部位不稳定性的来源。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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{{ truncateString('Yilun Liu', 18)}}的其他基金
RECQ5-dependent SUMO2 conjugation of PCNA in the resolution of transcription-replication conflicts
PCNA 的 RECQ5 依赖性 SUMO2 缀合解决转录复制冲突
- 批准号:
10558750 - 财政年份:2019
- 资助金额:
$ 38.78万 - 项目类别:
The function of Topoisomerase I SUMOylation in transcription and chemoresistance
拓扑异构酶 I SUMO 化在转录和化疗耐药中的作用
- 批准号:
9901592 - 财政年份:2018
- 资助金额:
$ 38.78万 - 项目类别:
The function of Topoisomerase I SUMOylation in transcription and chemoresistance
拓扑异构酶 I SUMO 化在转录和化疗耐药中的作用
- 批准号:
10132345 - 财政年份:2018
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
- 批准号:
8371475 - 财政年份:2011
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
- 批准号:
8101561 - 财政年份:2011
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
- 批准号:
8228028 - 财政年份:2011
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
- 批准号:
8811101 - 财政年份:2011
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
- 批准号:
8444281 - 财政年份:2011
- 资助金额:
$ 38.78万 - 项目类别:
The molecular basis of RECQ4-associated genetic disorders and cancer predispositi
RECQ4相关遗传性疾病和癌症易感性的分子基础
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8623102 - 财政年份:2011
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