Compact SchCas9 Recognizes the Simple NNGR PAM.

Compact SchCas9 Recognizes the Simple NNGR PAM.
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Compact SchCas9 识别简单的 NNGR PAM

DOI:
10.1002/advs.202104789
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发表时间:
2022-03
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
通讯作者:
Wang Y
Wang Y
中科院分区:
其他
文献类型:
--
作者:
Wang S;Mao H;Hou L;Hu Z;Wang Y;Qi T;Tao C;Yang Y;Zhang C;Li M;Liu H;Hu S;Chai R;Wang Y

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聚类规则间隔短回文重复序列(CRISPR)/SaCas9因其高效率和小基因组而成为最受欢迎的体内基因组编辑工具。作者先前开发了四个SaCas9同源物作为基因组编辑工具。在这里,为了扩大靶向范围,他们通过筛选16个SaCas9同源物来研究原间隔邻近基序(PAMs)的多样性,其中12个在哺乳动物细胞中显示编辑活性。他们识别出五种类型的pam: NNGRRT、NNGRRR、NNGRC、NNGA和NNGR。重要的是,SchCas9识别了简单的NNGR PAM,代表了迄今为止紧凑cas9中最宽松的PAM偏好。研究进一步证明,SchCas9能够在多种人类细胞系中进行高效的基因组编辑。总之,这些紧凑的Cas9工具为基础研究和临床应用提供了新的选择。紧凑集群规则间隔短回文重复序列(CRISPR)/CRISPR相关蛋白- 9 (Cas9)系统是一个很有前景的治疗应用平台,但其靶向范围主要局限于原间隔邻近基序(PAM)。为了扩大靶向范围,我们鉴定了一个识别简单NNGR (R = G或a) PAM的Cas9 (SchCas9)。SchCas9能够在多种人类细胞系中进行高效的基因组编辑。
Clustered regularly interspaced short palindromic repeat (CRISPR)/SaCas9 is the most popular tool for in vivo genome editing due to its high efficiency and small genome. The authors previously developed four SaCas9 orthologs as genome‐editing tools. Here, to expand the targeting scope, they investigate the diversity of protospacer adjacent motifs (PAMs) by screening a list of 16 SaCas9 orthologs, twelve of which display editing activity in mammalian cells. They recognize five types of PAMs: NNGRRT, NNGRRR, NNGRC, NNGA, and NNGR. Importantly, SchCas9 recognizes the simple NNGR PAM, representing the most relaxed PAM preference of compact Cas9s to date. It is further demonstrated that SchCas9 enables efficient genome editing in multiple human cell lines. Altogether, these compact Cas9 tools offer a new option for both basic research and clinical applications. The compact clustered regularly interspaced short palindromic repeat (CRISPR)/CRISPR‐associated protein‐9 (Cas9) system is a promising platform for therapeutic applications, but its targeting scope is largely restricted to the protospacer‐adjacent motif (PAM). To expand the targeting scope, a Cas9 (SchCas9) recognizing a simple NNGR (R = G or A) PAM is identified. SchCas9 enables efficient genome editing in multiple human cell lines.
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