Two chemical-controlled switchable Cas9s for tunable gene editing

Two chemical-controlled switchable Cas9s for tunable gene editing
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两个化学控制的可切换 Cas9,用于可调基因编辑

DOI:
10.1007/s41048-019-0093-3
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发表时间:
2019-06
期刊:
Biophysics report
影响因子:
--
通讯作者:
Jizhong Lou
Jizhong Lou
中科院分区:
其他
文献类型:
--
作者:
Meng Liang;Yang Cui;Jie Lan;Guangtao Song;Jizhong Lou

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The clustered regularly interspaced short palindromic repeats (CRISPR) loci and their associated (Cas) genes are found in many bacterial and archaeal genomes as adaptive defense systems against phage infection and plasmid transfer (Mohanraju et al. 2016). In the CRISPR-Cas system, single or multiple Cas proteins were complexed with a small CRISPR RNA (crRNA), forming an RNA protein complex (RNP), which uses the crRNA as the guide to destruct the invading nucleic acids (Mohanraju et al. 2016). Based on CRISPR locus organization and the Cas gene content, CRISPR-Cas systems are divided into two classes. Class 1 systems use a complex of several Cas proteins called Cascade, while class 2 systems use a single Cas protein (such as Cas9), as interference module to recognize and cleave the target nucleic acids (Mohanraju et al. 2016). In 2013, a class 2 CRISPR-Cas system, CRISPR-Cas9, from Streptococcus pyogenes, was repurposed as a revolutionary tool for precise gene editing and gene expression control (Cong et al. 2013). In this system, the Streptococcus pyogenes Cas9 (SpyCas9) first binds to an artificial chimeric single-guide RNA (sgRNA) comprising crRNA and a transactivating crRNA (tracrRNA) module to form an effector complex (Cas9–sgRNA complex)(Jinek et al. 2012). After the recognition of a short protospaceradjacent motif (PAM) sequence in target DNA, Cas9–sgRNA complex binds and induces an R-loop in target
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