课题基金基金详情
TLS聚合酶Polη乙酰化修饰的动态调控和功能研究
结题报告
批准号:
31970740
项目类别:
面上项目
资助金额:
58.0 万元
负责人:
郭彩霞
学科分类:
细胞信号转导
结题年份:
2023
批准年份:
2019
项目状态:
已结题
项目参与者:
郭彩霞
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中文摘要
跨损伤DNA合成(TLS)通路与基因组变异和肿瘤耐药性产生密切相关,抑制TLS不仅有助于降低肿瘤耐药性,还能和ATR抑制剂联用产生协同致死效果,因此关于其调控机制和干预手段研究一直是DNA损伤应答领域一个热点。蛋白质乙酰化修饰在多种生命活动中发挥重要作用,然而关于乙酰化修饰在TLS通路中的调控作用至今仍是空白。在前期研究中,申请人通过质谱分析发现TLS聚合酶Polη上存在多个乙酰化修饰位点,部分位点的模拟乙酰化修饰能干扰紫外辐射后Polη在复制叉处的募集/停留,降低细胞的TLS活性。本项目将整合多种分子和细胞生物学技术、结合小鼠模型,深入研究Polη 乙酰化修饰对其在DNA损伤位点募集、对TLS活性和肿瘤耐药性的影响,阐明该修饰调控TLS通路的作用机制;寻找调控Polη 动态乙酰化修饰的酶,解析其调控机制,为化学干预Polη动态乙酰化修饰来改善肿瘤化疗效果奠定基础。
英文摘要
Translesion DNA synthesis (TLS) is closely related to genome mutagenesis and chemotherapeutic drug resistance. TLS Inhibition can not only reduce tumor drug resistance, but also promote synthetic lethality with ATR inhibitors. Therefore, it remains a hot topic in the field of DNA damage response to study how TLS pathway is regulated. Protein acetylation is important in many cellular Processes. So far, it remains a mystery how acetylation functions in TLS pathway. In our preliminary studies, we found that human Polη is subject to acetylation at some potential residues. Among them, several acetylation mimic mutants display impaired recruitment/retention at stalled replication forks and reduced TLS activity after UV irradiation. By integrating multiple cellular, biochemical and molecular techniques, this project aims at exploring the effects of Polη acetylation on its foci formation and TLS capacity after DNA damage as well as drug resistance, to understand the mechanism how acetylation regulates TLS. Meanwhile, we will explore the acetyltransferases and deacetylases responsible for the modification and determine how they dynamically regulate Polη acetylation status. We believe these results will provide important insights for drug intervention based on targeting Polη acetylation to improve chemotherapeutic efficacy.
期刊论文列表
专著列表
科研奖励列表
会议论文列表
专利列表
DOI:10.1186/s13578-023-01062-y
发表时间:2023-07-03
期刊:CELL AND BIOSCIENCE
影响因子:7.5
作者:Zhao, Song;Feng, Haiping;Jiang, Dongfang;Yang, Keyan;Wang, Si-Tong;Zhang, Yu-Xin;Wang, Yun;Liu, Hongmei;Guo, Caixia;Tang, Tie-Shan
通讯作者:Tang, Tie-Shan
DOI:10.1093/lifemedi/lnad015
发表时间:2023
期刊:Life Medicine
影响因子:--
作者:Hongmei Liu;Dongfang Jiang;Fuwen Yao;Tingting Li;Bo Zhou;Song Zhao;Keyan Yang;Haiping Feng;Jiaqi Shen;Jinglan Tang;Sijia Wang;Yu-Xin Zhang;Yun Wang;Qian Li;Yongliang Zhao;Caixia Guo;Tie-Shan Tang
通讯作者:Tie-Shan Tang
DOI:10.26599/fshw.2022.9250241
发表时间:2024-09-01
期刊:FOOD SCIENCE AND HUMAN WELLNESS
影响因子:7
作者:Ma,Xiaolu;Yang,Fei;Guo,Caixia
通讯作者:Guo,Caixia
DOI:10.1038/s41419-022-05131-x
发表时间:2022-08-04
期刊:CELL DEATH & DISEASE
影响因子:9
作者:Yang, Ke-Yan;Zhao, Song;Feng, Haiping;Shen, Jiaqi;Chen, Yuwei;Wang, Si-Tong;Wang, Si-Jia;Zhang, Yu-Xin;Wang, Yun;Guo, Caixia;Liu, Hongmei;Tang, Tie-Shan
通讯作者:Tang, Tie-Shan
DNA polymerase η promotes nonhomologous end joining upon etoposide exposure dependent on the scaffolding protein Kap1.
DNA聚合酶η可促进非同源末端连接,依托泊苷暴露取决于脚手架蛋白KAP1。
DOI:10.1016/j.jbc.2022.101861
发表时间:2022-05
期刊:JOURNAL OF BIOLOGICAL CHEMISTRY
影响因子:4.8
作者:Ma, Xiaolu;Wang, Chen;Zhou, Bo;Cheng, Zina;Mao, Zhiyong;Tang, Tie-Shan;Guo, Caixia
通讯作者:Guo, Caixia
自身免疫性疾病相关因子VGLL3调控DNA损伤应答与肿瘤免疫微环境重塑研究
调控BRCA1突变乳腺癌PARP抑制剂应答的关键增强子及其下游基因研究
DNA聚合酶eta O-GlcNAc糖基化修饰对其功能的调控研究
非编码RNA及其互作因子表观调控DNA损伤修复研究
错配修复蛋白MSH2调控跨损伤DNA合成与疾病发生研究
基因组突变相关的跨损伤合成聚合酶REV1的功能研究
CSN5-REV1相互作用及其重要的生物学功能
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