根据NAT10的酶域和DDX21的乙化,NAT10可以解决有害的核细胞R循环
Kunqi Su1, Zhuochen Zhao1, Yuying Wang1
1Department of Cell Biology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100191, China.
Cell communication and signaling : CCS
|October 11, 2024
概括
核酸乙转移酶NAT10通过其酶活性和通过乙化DDX21来解决有害的R循环,防止DNA损伤并保持基因组稳定性. 这种双重机制对于解决核子R循环至关重要.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 异常的R循环积累会导致DNA损伤和基因组不稳定.
- 由Pol I转录产生的核细胞R循环是细胞R循环的重要贡献者.
- 核子R循环分辨率的机制尚不清楚.
研究的目的:
- 调查核细胞乙转移酶NAT10在核细胞R循环分解中的作用.
- 阐明NAT10为R回路分辨率做出贡献的机制.
- 了解NAT10,DDX21和基因组稳定性之间的相互作用.
主要方法:
- 克里斯普尔/卡斯9和shRNA用于NAT10的敲击.
- 免疫光染色和RNase H处理以检测R循环.
- 试验室中螺旋酶测定,共免疫沉降和GST拉下来研究蛋白质相互作用和活动.
- 质谱测量以确定乙化位点.
- 西方斑点和免疫光染色用于DNA损伤标记物 (γH2AX).
主要成果:
- NAT10的耗尽导致核细胞R循环积累和DNA损伤.
- NAT10通过其化酶域和乙转移酶活性来解决R循环.
- 在特定部位 (K236,K573) 中,NAT10 乙化DDX21,增强DDX21 酶活性.
- NAT10和DDX21通过双重途径合作,以解决核细胞R循环.
结论:
- NAT10被确定为一种新的R-循环解析酶.
- 通过NAT10的核状R循环分辨率取决于其酶活性和DDX21乙化.
- NAT10和DDX21的合作作用对于通过解决核细胞R循环来维持基因组稳定性至关重要.
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