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Mastercycler® nexus

Company: Eppendorf
Catalog#: Mastercycler® nexus
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Multiple Stepwise Gene Knockout Using CRISPR/Cas9 in Escherichia coli
Author:
Date:
2018-01-20
[Abstract]  With the recent implementation of the CRISPR/Cas9 technology as a standard tool for genome editing, laboratories all over the world are undergoing one of the biggest advancements in molecular biology since PCR. The key advantage of this method is its simplicity and universal applicability for species of any phylum. Of particular interest is the extensively studied Gram-negative bacterium Escherichia coli, as it is considered as the workhorse for both research and industrial purposes. Here, we present a simple, robust and effective protocol using the CRISPR/Cas9 system in combination with the λ Red machinery for gene knockout in E. coli. Crucial in our procedure is the use of a double-stranded donor DNA and a curing strategy for removal of the guide RNA encoding plasmid ... [摘要]  随着CRISPR / Cas9技术作为基因组编辑的标准工具的最近实施,全世界的实验室正在经历PCR以来分子生物学方面最大的进步之一。这种方法的关键优点是其简单和普遍适用于任何物种的门。特别感兴趣的是广泛研究的革兰氏阴性细菌大肠杆菌,因为它被认为是研究和工业用途的主力。在这里,我们提出了一个简单,强大和有效的协议,使用CRISPR / Cas9系统结合λ红色基因敲除机器。大肠杆菌。在我们的程序中最重要的是使用双链供体DNA和固化策略来去除导向RNA编码质粒,其允许在仅仅两个工作日后开始新的突变。我们的方案允许多个具有高诱变效率的基因敲除株,适用于高通量的方法。

【背景】革兰氏阴性细菌大肠杆菌是生物技术工程中最重要的生物之一。已在能源,农业,食品生产,生物技术,医药等不同行业的各种流程中成功实施。由于不断的技术进步,生物技术部门正在迅速发展。特别是,CRISPR / Cas9技术可能是PCR(分子)生物学最大的革命(Ledford,2015)。简而言之,CRISPR / Cas9保护细菌免受诸如质粒和病毒等侵入性遗传因子的影响(Marraffini,2015)。利用这种从原核生物获得的免疫系统,已经开发了基于CRISPR / Cas9系统的基因组编辑的非常有力的工具(Jinek等人,2012)。

CRISPR / ...

Multiplexed GuideRNA-expression to Efficiently Mutagenize Multiple Loci in Arabidopsis by CRISPR-Cas9
Author:
Date:
2017-03-05
[Abstract]  Since the discovery of the CRISPR (clustered regularly interspaced short palindromic repeats)-associated protein (Cas) as an efficient tool for genome editing in plants (Li et al., 2013; Shan et al., 2013; Nekrasov et al., 2013), a large variety of applications, such as gene knock-out, knock-in or transcriptional regulation, has been published. So far, the generation of multiple mutants in plants involved tedious crossing or mutagenesis followed by time-consuming screening of huge populations and the use of the Cas9-system appeared a promising method to overcome these issues. We designed a binary vector that combines both the coding sequence of the codon optimized Streptococcus pyogenes Cas9 nuclease under the control of the Arabidopsis thaliana ... [摘要]  自从发现CRISPR(聚集的定期交织的短回文重复) - 相关蛋白(Cas)作为植物基因组编辑的有效工具(Li等人,2013; Shan等人已经出版了诸如基因敲除,敲入或转录调控等各种各样的应用,例如,2013; Nekrasov等人,2013)。到目前为止,植物中多种突变体的产生涉及繁琐的杂交或诱变,随后大量人群的耗时筛选,Cas9系统的使用似乎是有希望的方法来克服这些问题。我们设计了一种二元载体,其结合了在拟南芥UBIQUITIN10(UBQ10)启动子和引导RNA(gRNA)控制下的优化的化脓性链球菌(Caspase)密码子的编码序列)由 A驱动的表现盒。拟南芥U6 - 启动子,用于在拟南芥中进行有效的多重编辑(阎等人,2016年)。在这里,我们描述了一个逐步的方案,以经济有效的方式生成含有多个gRNA的二元载体和基于经典克隆方法的Cas9核酸酶。背景 RNA引导的Cas9系统源于针对外源DNA的细菌防御系统(Sorek等人,2013)。由于其高效率,易于处理和多重编辑的可能性,已经被认为是基因组编辑的选择方法。通常,Cas9基因编辑系统涉及单个合成RNA分子,其指导Cas9蛋白质靶向所需DNA位点以进行基因组修饰或转录控制的gRNA。 gRNA-Cas9复合物通过gRNA-DNA配对识别靶向的DNA,并需要存在原始相邻基序(PAM)。 ...

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