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工程真核转子子编码的Fanzor2系统用于哺乳动物的基因组编辑
Yinghui Wei1,2, Pengfei Gao3, Deng Pan4
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, China. yinghuiwei@nwafu.edu.cn.
Nature chemical biology
|May 20, 2025
概括
工程Fanzor2核酶 (enNlovFz2) 显著提高了哺乳动物细胞中的基因组编辑效率. 这一突破使得胚胎中的基因破坏和杜申肌肉发育不良等遗传疾病的潜在疗法成为可能.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 生物技术是生物技术.
背景情况:
- 源自真核转位子的Fanzor蛋白因其小小的尺寸和与TnpB的相似性而对基因组工程具有前景.
- 野生类型的Fanzor系统在哺乳动物细胞中表现出有限的活性,阻碍了它们的治疗潜力.
研究的目的:
- 设计一个增强的Fanzor2核酶系统 (enNlovFz2),提高基因组编辑效率和扩展目标识别.
- 评估工程系统在哺乳动物细胞,胚胎和疾病模型中的有效性.
主要方法:
- 使用AlphaFold3指导蛋白质工程的Fanzor2复合物的结构预测.
- 对NlovFz2核酶及其 ωRNA进行工程,以创建enNlovFz2系统.
- 评估基因组编辑效率和目标相邻动机 (TAM) 识别范围.
- 在小鼠胚胎中的体内测试和杜氏肌肉衰竭小鼠模型.
主要成果:
- 与野生型NlovFz2.2相比,进化后的enNlovFz2系统显示基因组编辑效率增加了11.1倍.
- enNlovFz2表现出更广泛的目标相邻图案 (TAM) 识别范围 (5'-NMYG).
- 该系统的编辑效率与已建立的TnpB和CRISPR-Cas12f1核酶相提并论.
- 在小鼠胚胎中观察到高效的基因干扰,在杜申氏肌力发育不良的小鼠模型中通过单次AAV输送恢复了素表达.
结论:
- 设计的enNlovFz2系统代表了RNA引导核酶技术的重大进步.
- 这种增强的Fanzor2系统为基础生物学研究和治疗基因组工程应用提供了多功能和高效的工具.
- 在疾病模型中的成功应用突显了Fanzor核酶在治疗遗传疾病方面的潜力.
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