在线粒体DNA中增强C-To-T和A-To-G基编辑,使用工程DdCBE和TALED
Yinghui Wei1,2, Ming Jin3, Shuhong Huang1
1International Joint Agriculture Research Center for Animal Bio-Breeding of Ministry of Agriculture and Rural Affairs, College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 20, 2023
概括
优化的线粒体基编辑器显示了增强的活性和扩展的准C-to-T和A-to-G基编辑. 这些工具提高了目标效率,并减少了线粒体DNA (mtDNA) 的非目标编辑,用于疾病建模.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 生物技术是生物技术.
背景情况:
- 使用DddA衍生的细胞基编辑器 (DdCBE) 进行线粒体基编辑在目标序列可访问性和编辑效率方面面临限制.
- 现有的DdCBE系统表现出适度的活动和C-to-T基数转换的有限范围.
研究的目的:
- 设计优化的DDDA衍生基础编辑器 (DdCBE和TALED),以增强编辑活动和扩展准能力.
- 为了提高线粒体基编辑的效率和特异性,用于疾病建模中的应用.
主要方法:
- DddA变体与不同的细胞因子去氨酶 (例如,AID) 和与TALE相关的脱氧腺酶去氨酶 (TALED) 的融合.
- 在DddA和核出口信号 (NES) 序列中纳入高保真性突变.
- 在人类细胞和小鼠胚胎中测试工程编辑器,以进行目标和非目标编辑分析.
主要成果:
- 与AID的融合显著提高了C-to-T编辑效率 (高达25倍),并扩展了针对5'-GC-3'序列的定位.
- 工程 DddA6-TALED 证明了 A-to-G 基础编辑效率的提高.
- NES序列减少了核和线粒体基因组的非目标编辑,提高了mtDNA编辑效率.
结论:
- 优化的DdCBE和TALED工具提供了显著改进的线粒体基编辑功能.
- 这些工程编辑器有效地在人类细胞和小鼠胚胎中引入mtDNA突变,促进疾病建模.
- 该研究为基础研究和针对线粒体DNA的治疗开发提供了具有广泛意义的工具.
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