改造的小鼠H1促进子突变,具有优越的RNA聚合酶III活性
Jiaying Wu1, Yufei Zhou2, Di Zhao2
1Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China.
Biochemistry and biophysics reports
|August 23, 2024
概括
研究人员对小鼠的H1 (mH1) 促进体进行了RNA干扰和基因组编辑的特征. 改造的mH1突变体显示增强的RNA聚合酶III活性,为基因表达提供了新的工具.
科学领域:
- 分子生物学分子生物学
- 基因规则 基因规则
- 生物技术是生物技术.
背景情况:
- 人类H1 (hH1) 促销物广泛用于RNA干扰 (RNAi) 和基因组编辑.
- 对小鼠H1 (mH1) 促进体的有限理解阻碍了它在小鼠模型中的应用.
- 鉴定mH1促进体的特征对于推进小鼠基因操纵技术至关重要.
研究的目的:
- 预测和描述鼠标的H1 (mH1) 促销物及其核心元素.
- 评估mH1促进体的RNA聚合酶II (Pol II) 和III (Pol III) 活动.
- 为了改进基因表达,设计具有增强Pol III活性的mH1促进体变体.
主要方法:
- 全球对齐被用来预测mH1促销器和mH1核心促销器序列.
- 测量了报告者基因表达 (EGFP) 和人工序列丰度,以评估Pol II和Pol III活动.
- 用定位突变和元素交换来设计mH1促销物突变.
主要成果:
- 野生类型的mH1促进体与hH1促进体相比,通常表现出较弱的Pol II和Pol III活动.
- 一个突变的mH1核心促进体 (mH1核心突变5) 与一个富含AT的区域显示了至少两倍的Pol II活动.
- 突变的mH1 mut1,mH1核心 mut5和mH1 mut4显示出至少1.5倍强的Pol III活性,而不是父母促进体.
结论:
- 工程设计的mH1促进体变体,特别是具有AT延伸的变体,显著增强了Pol III活动.
- 在mH1核心突变5变体显示了潜在的目标蛋白表达由于增加的Pol II活动.
- 这些新的mH1促进器变体是3型Pol III促进器工具箱的宝贵补充.
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