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一个紧的分子基础和基因组编辑应用Eubacterium ventriosumCRISPR-Cas9系统的应用

Na Tang¹, Zhaowei Wu¹, Yan Gao²

¹School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.

ACS synthetic biology

|December 7, 2023

概括

来自Eubacterium ventriosum (EvCas9) 的新型紧型CRISPR-Cas9系统提供了高效的基因组编辑,具有独特的PAM特异性. 这一发现扩大了治疗应用的CRISPR工具箱.

科学领域:

分子生物学分子生物学
遗传学是一个遗传学.
生物化学生化学

背景情况:

CRISPR-Cas9系统是强大的基因组编辑工具,但由于大尺寸和严格的PAM要求,它们面临着局限性.
这些局限性阻碍了它们广泛的治疗应用.

研究的目的:

描述一种来自Eubacterium ventriosum (EvCas9) 的新型紧型CRISPR-Cas9系统.
阐明其PAM识别和DNA结合的分子基础.
为了评估其基因组编辑效率和忠实性在各种细胞类型.

主要方法:

通过冷电子显微镜 (cryo-EM) 确定了EvCas9的结构,该结构与sgRNA和目标DNA复合在一起.
评估了细菌和人类细胞系中的基因组编辑活动.
通过融合除氨酶酶来设计EvCas9基编辑器.

主要成果:

确定了一个紧的EvCas9系统 (1107个残留物),具有明显的5'-NNGDGN-3'PAM特异性.
通过结构分析揭示了PAM识别和核酸关联的详细机制.
在细菌和人类细胞中证明了强大的基因组编辑,其保真度高于SaCas9和SpCas9.
成功地将EvCas9设计成高效的cytidine和adenosine基编辑器.

结论:

EvCas9代表了对紧的CRISPR-Cas9工具箱的一个有价值的补充.
它的独特特性和高保真性增强了基因组编辑能力.
这项工作促进了对CRISPR-Cas9机制的理解,并扩大了治疗潜力.

关键词:

克里斯普尔是什么意思?克里斯普尔是什么意思?这就是Cas9的情况.在 PAM 认可机制上.基因编辑基因编辑结构结构结构结构

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