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KOD FX Neo

KOD FX Neo

Company: TOYOBO
Catalog#: KFX-201
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Targeted Nucleotide Substitution in Mammalian Cell by Target-AID
Author:
Date:
2017-06-05
[Abstract]  Programmable RNA-guided nucleases based on CRISPR (clustered regularly interspaced short palindromic repeats)-Cas (CRISPR-associated protein) systems have been applied to various type of cells as powerful genome editing tools. By using activation-induced cytidine deaminase (AID) in place of the nuclease activity of the CRISPR/Cas9 system, we have developed a genome editing tool for targeted nucleotide substitution (C to T or G to A) without donor DNA template (Figure 1; Nishida et al., 2016). Here we describe the detailed method for Target-AID to perform programmable point mutagenesis in the genome of mammalian cells. A specific method for targeting the hypoxanthine-guanine phosphoribosyltransferase (HPRT) gene in Chinese Hamster Ovary (CHO) cell was described here as an ... [摘要]  基于CRISPR的可编程RNA引导核酸酶(集群定期交织的短回文重复)-Cas(CRISPR相关蛋白)系统已被应用于各种类型的细胞作为强大的基因组编辑工具。通过使用激活诱导的胞苷脱氨酶(AID)代替CRISPR / Cas9系统的核酸酶活性,我们开发了一种用于靶向核苷酸替代(C至T或G至A)的基因组编辑工具,无供体DNA模板(图1 ; Nishida等人,2016)。这里我们描述Target-AID在哺乳动物细胞基因组中进行可编程点突变的详细方法。在这里描述了用于靶向中国仓鼠卵巢(CHO)细胞中的次黄嘌呤 - 鸟嘌呤磷酸核糖基转移酶(HPRT)基因的具体方法作为实例,而该方法主要应适用于任何感兴趣的基因广泛的细胞类型。


图1. Target-AID及其可靶向位点的示意图。在指导RNA(gRNA)依赖性方式中,通过接头与nCas9(D10A)融合的PmCDA1在-21周围进行可编程胞苷突变至相对于哺乳动物细胞中非互补链上的PAM序列的-16位。可目标地点是根据以前的工作中观察到的有效的基础替代(> 20%)来确定的。
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Efficient AAV-mediated Gene Targeting Using 2A-based Promoter-trap System
Author:
Date:
2016-12-20
[Abstract]  Adeno-associated virus (AAV)-based targeting vectors have 1-4-log higher gene targeting efficiencies compared with plasmid-based targeting vectors. The efficiency of AAV-mediated gene targeting is further increased by introducing a promoter-trap system into targeting vectors. In addition, we found that the use of ribosome-skipping 2A peptide rather than commonly used internal ribosome entry site (IRES) in the promoter-trap system results in significantly higher AAV-mediated gene targeting efficiencies (Karnan et al., 2016). In this protocol, we describe the procedures for AAV-mediated gene targeting exploiting 2A for promoter trapping, including the construction of a targeting vector based on the platform plasmid pAAV-2Aneo or pAAV-2Aneo v2, production of AAV particles, infection ... [摘要]  与基于质粒的靶向载体相比,基于腺相关病毒(AAV)的靶向载体具有1-4对较高的基因靶向效率。 通过将启动子捕获系统引入靶向载体中,AAV介导的基因靶向的效率进一步增加。 此外,我们发现使用核糖体跳跃2A肽而不是通常使用的内部核糖体进入位点(IRES)在启动子捕获系统中导致显着更高的AAV介导的基因靶向效率(Karnan等,2016)。 在该方案中,我们描述了AAV介导的基因靶向开发2A用于启动子捕获的程序,包括基于平台质粒pAAV-2Aneo或pAAV-2Aneo v2的靶向载体的构建,AAV颗粒的产生,细胞感染 基于AAV的靶向载体,以及基因靶向细胞克隆的分离和验证。
【背景】以前在其他方案中描述了AAV介导的基因靶向的程序(对应于本方案的BG部分)(Kohli等人,2004; Rago等人,2007; Khan等人,2011; Howes and Schofield ,2015)。 然而,该方案提供了如何使用基于2A的启动子捕获系统首次进行AAV介导的基因靶向的详细描述。

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