Defining CRISPR-Cas9 genome-wide nuclease activities with CIRCLE-seq.

Defining CRISPR-Cas9 genome-wide nuclease activities with CIRCLE-seq.
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定义CRISPR-CAS9全基因组核酸酶活性的活性。

DOI:
10.1038/s41596-018-0055-0
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发表时间:
2018-11
期刊:
影响因子:
14.8
通讯作者:
Tsai SQ
Tsai SQ
中科院分区:
生物学1区
文献类型:
--
作者:
Lazzarotto CR;Nguyen NT;Tang X;Malagon-Lopez J;Guo JA;Aryee MJ;Joung JK;Tsai SQ

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通过测序体外报告切割效应的环化 (CIRCLE-seq) 是一种敏感且无偏见的方法,用于通过对核酸酶切割的基因组 DNA 进行选择性测序来定义 CRISPR-Cas9 核酸酶的全基因组活性(在靶和脱靶)。在这里,我们描述了 CIRCLE-seq 的详细实验和分析协议。我们方法的原理是生成具有最少数量游离末端的环化基因组 DNA 文库。使用 CRISPR-Cas9 核糖核蛋白复合物处理高度纯化的基因组 DNA 环,然后将核酸酶线性化的 DNA 片段连接至接头以进行高通量测序。与定义全基因组基因组编辑活性的其他体外方法相比,CIRCLE-seq 的主要优势包括:1) 对核酸酶切割的基因组 DNA 进行测序的高度富集/低背景,可实现低测序深度要求的灵敏检测;2) 配对末端读取可包含单个核酸酶切割位点的完整信息,可用于没有高质量参考基因组的物种。整个方案可在 2 周内完成,其中 3 天用于文库准备。
Circularization for in vitro reporting of cleavage effects by sequencing (CIRCLE-seq) is a sensitive and unbiased method for defining the genome-wide activity (on-target and off-target) of CRISPR-Cas9 nucleases by selective sequencing of nuclease-cleaved genomic DNA. Here we describe a detailed experimental and analytical protocol for CIRCLE-seq. The principle of our method is to generate a library of circularized genomic DNA with minimized numbers of free ends. Highly purified genomic DNA circles are treated with CRISPR-Cas9 ribonucleoprotein complexes, and nuclease-linearized DNA fragments are then ligated to adapters for high-throughput sequencing. Primary advantages of CIRCLE-seq when compared to other in vitro methods for defining genome-wide genome editing activity include: 1) high enrichment for sequencing nuclease-cleaved genomic DNA/low background enabling sensitive detection with low sequencing depth requirements and 2) paired-end reads can contain complete information on individual nuclease cleavage sites enabling use in species without high-quality reference genomes. The entire protocol can be completed in 2 weeks, with 3 days for library preparation.
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影响因子: 46.9
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