相关实验视频
Updated: Sep 11, 2025

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Genome Editing in Mammalian Cell Lines using CRISPR-Cas
Published on: April 11, 2019
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基因组PAM指导使用哺乳动物基因组重复的CRISPR-Cas核酶的PAM特征和工程
Miao Yu1,2, Limei Ai1,2, Bang Wang2,3
1Department of Biomedical Sciences and Tung Biomedical Sciences Centre, College of Biomedicine, City University of Hong Kong, Kowloon, Hong Kong SAR, China.
Nature biomedical engineering
|August 13, 2025
概括
我们开发了GenomePAM,这是一种新方法来表征CRISPR-Cas原空间器相邻基因 (PAM) 在哺乳动物细胞中的偏好. 这种方法可以实现可扩展的发现Cas酶和基因编辑应用的工程变体.
科学领域:
- * 分子生物学 * 分子生物学
- * 基因组学 是一个学科.
- * 基因编辑技术
背景情况:
- *对Cas酶的原体空间邻基因 (PAM) 要求的表征对于发现新的CRISPR-Cas系统和用于哺乳动物细胞的工程变体至关重要.
- *目前用于PAM表征的方法往往是低效的,并且不能在哺乳动物细胞环境中广泛应用.
研究的目的:
- * 开发一种可扩展的方法,用于在哺乳动物细胞中直接表征PAM.
- * 为了使卡斯酶及其工程变体的有效发现和表征.
- * 促进对核酶活动和忠实性的比较分析.
主要方法:
- *开发了GenomePAM,这是一种利用内源基因组重复序列作为哺乳动物细胞内的点的新方法.
- * 利用了在人类基因组中经常存在的20核酸 (nt) 原空间子,并配有多样化的基因组序列.
- *避免了对PAM分析的蛋白质净化或合成寡核酸的需求.
主要成果:
- * 基因组PAM准确确定了对II型和V型核酶的PAM要求,包括SpRY和CjCas9.
- * 证明了该方法能够描述最小和扩展的PAM偏好.
- * 能够同时比较成千上万个基因组位点的Cas核酶活动和忠实性.
- * 提供了对全基因组染色体可访问性概况的见解.
结论:
- *GenomePAM为哺乳动物细胞中的PAM表征提供了一种可扩展和直接的方法.
- * 该方法加速了Cas核酶的发现和工程,用于各种基因编辑应用.
- *GenomePAM为比较核酶分析和理解基因组可访问性提供了一个强大的工具.
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