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Gene Pulser®/MicroPulserTM Electroporation Cuvettes, 0.2 cm gap

Company: Bio-Rad Laboratories
Catalog#: 1652082
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CRISPR/Cas9-mediated ssDNA Recombineering in Corynebacterium glutamicum
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Date:
2018-10-05
[Abstract]  Corynebacterium glutamicum is a versatile workhorse for industrial bioproduction of many kinds of chemicals and fuels, notably amino acids. Development of advanced genetic engineering tools is urgently demanded for systems metabolic engineering of C. glutamicum. Recently unveiled clustered regularly interspaced short palindromic repeats (CRISPR) and their CRISPR-associated proteins (Cas) are now revolutionizing genome editing. The CRISPR/Cas9 system from Streptococcus pyogenes that utilizes NGG as protospacer adjacent motif (PAM) and has good targeting specificity can be developed into a powerful tool for efficient and precise genome editing of C. glutamicum. In this protocol, we described the general procedure for CRISPR/Cas9-mediated ssDNA ... [摘要]  谷氨酸棒杆菌是多种化学品和燃料,特别是氨基酸的工业生物生产的多功能工具。 迫切需要开发先进的基因工程工具用于 C的系统代谢工程。谷氨酸。 最近推出的聚集的有规律的间隔短回文重复序列(CRISPR)和它们的CRISPR相关蛋白(Cas)现在正在彻底改变基因组编辑。 来自 Streptococcus pyogenes 的CRISPR / Cas9系统利用NGG作为原型间隔区相邻基序(PAM)并具有良好的靶向特异性,可以开发成为 C的高效和精确基因组编辑的有力工具。谷氨酸。 在该方案中,我们描述了 C中CRISPR / Cas9介导的ssDNA重组工程的一般程序。谷氨酸。 可以在 C中引入小的修改。 谷氨酸染色体,编辑效率高达90%。
【背景】革兰氏阳性土壤细菌 Corynebacterium glutamicum 是用于氨基酸,生物燃料和聚合物构建模块的工业生物生产的多功能工具(Becker et al。,2016)。在 C工程的早期阶段。谷氨酸,随机诱变结合对氨基酸类似物的表型抗性的阳性选择是最常用的策略(Vertes et al。,2005)。 C中的遗传操作。谷氨酸(glutamicum)于1984年启动,并成为菌株改良的关键促成策略(Ozaki et al。,1984)。常规使用的基因破坏和插入 ...

Evaluation of Plasmid Stability by Negative Selection in Gram-negative Bacteria
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Date:
2017-05-05
[Abstract]  Plasmid stability can be measured using antibiotic-resistance plasmid derivatives by positive selection. However, highly stable plasmids are below the sensitivity range of these assays. To solve this problem we describe a novel, highly sensitive method to measure plasmid stability based on the selection of plasmid-free cells following elimination of plasmid-containing cells. The assay proposed here is based on an aph-parE cassette. When synthesized in the cell, the ParE toxin induces cell death. ParE synthesis is controlled by a rhamnose-inducible promoter. When bacteria carrying the aph-parE module are grown in media containing rhamnose as the only carbon source, ParE is synthesized and plasmid-containing cells are eliminated. Kanamycin resistance (aph) is ... [摘要]  可以通过阳性选择使用抗生素抗性质粒衍生物来测量质粒稳定性。然而,高度稳定的质粒低于这些测定的灵敏度范围。为了解决这个问题,我们描述了一种新颖的,高度灵敏的方法来测量质粒稳定性,这是基于在含有质粒的细胞消除后,无质粒细胞的选择。这里提出的检测方法是基于aph-parE 盒式磁带。当细胞合成时,ParE毒素诱导细胞死亡。 ParE合成由鼠李糖诱导型启动子控制。当携带 aph-parE 模块的细菌生长在含有鼠李糖作为唯一碳源的培养基中时,合成ParE,消除含有质粒的细胞。进一步使用卡那霉素抗性( aph )来证实在鼠李糖生长的细菌中不存在质粒。

背景 通过使用抗生素抗性质粒衍生物的阳性选择测定质粒稳定性。携带研究质粒的​​细胞在选择性抗生素(Gerdes等人,1985; del Solar等人,1987)的存在下被阳性选择。这种技术的主要缺点是其灵敏度;高度稳定的质粒低于这些测定的敏感性。为了解决这个问题,已经描述了依靠直接选择无质粒细胞例如 - 四环素系统的替代方法(Bochner等人,1980; Maloy和Nunn,1981; Garcia-Quintanilla 等人,2006)。 - ...

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