通过工程 Un1Cas12f1 平台进行非正规的目标链细胞因子基编辑
Ziguo Song1,2, Junfan Guo3, Zhanqing Fan1,2
1Hainan Institute of Northwest A&F University, Sanya, China.
Nature communications
|October 29, 2025
概括
研究人员使用Cas12f为基因编辑设计了一个紧的CRISPR基基编辑器. 这种新工具可以编辑两个DNA链,扩大其治疗应用的潜力.
科学领域:
- 分子生物学分子生物学
- 基因编辑技术的技术
- 生物技术是生物技术.
背景情况:
- 克里斯普尔/卡斯基编辑器 (BEs) 能够在没有双链断裂的情况下实现有针对性的DNA基基转换.
- 开发较小的BEs对于通过病毒载体有效传递至关重要.
- Cas12f系统为微型基因编辑工具提供了一个紧的平台.
研究的目的:
- 设计与治疗性病毒载体兼容的微型基础编辑器.
- 探索和优化Cas12f系统的基础编辑应用程序.
- 开发具有扩展编辑能力的链式可选择的基础编辑器.
主要方法:
- 计算建模和蛋白质突变发生来增强Cas12f活动.
- 来自Cas12f.的细胞因子基编辑器 (CBE) 的构建和表征.
- 氨酸扫描突变发生,以改进编辑特异性和链偏好.
- 用DNA结合域进行工程,以优化体内性能.
主要成果:
- 一种经过工程改造的enUn1Cas12f1蛋白显示出高活性.
- 一种新的Cas12f衍生CBE意外地编辑了非目标和目标DNA链.
- 一个 nickase-CBE (TSminiCBE) 已被开发用于优选的目标链编辑.
- 在小鼠的体内基编辑中实现了优化的TS编辑BE.
结论:
- Cas12f平台可以被设计成一个多功能,微型的基础编辑器.
- 重用Cas12f动态使得可以选择链的编辑功能.
- 微型,可链选择的CBE工具包对各种基因疗法应用具有重大潜力.
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