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MPS 1000 Mini Plate Spinner

Company: Next Day Science
Catalog#: C1000
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Selection of Genetically Modified Bacteriophages Using the CRISPR-Cas System
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Date:
2017-08-05
[Abstract]  We present a CRISPR-Cas based technique for deleting genes from the T7 bacteriophage genome. A DNA fragment encoding homologous arms to the target gene to be deleted is first cloned into a plasmid. The T7 phage is then propagated in Escherichia coli harboring this plasmid. During this propagation, some phage genomes undergo homologous recombination with the plasmid, thus deleting the targeted gene. To select for these genomes, the CRISPR-Cas system is used to cleave non-edited genomes, enabling isolation of the desired recombinant phages. This protocol allows seamless deletion of desired genes in a T7 phage, and can be expanded to other phages and other types of genetic manipulations as well. [摘要]  我们提出了一种用于从T7噬菌体基因组中删除基因的基于CRISPR-Cas的技术。 首先将编码与待缺失的靶基因的同源臂的DNA片段克隆到质粒中。 然后将T7噬菌体在携带该质粒的大肠杆菌中繁殖。 在这种繁殖期间,一些噬菌体基因组与质粒进行同源重组,从而缺失靶基因。 为了选择这些基因组,CRISPR-Cas系统用于切割未编辑的基因组,从而能够分离所需的重组噬菌体。 该协议允许在T7噬菌体中无缝地删除所需的基因,并且可以扩展到其它噬菌体和其他类型的遗传操作。
【背景】噬菌体(噬菌体)是生物圈中最普遍和广泛分布的生物实体,突出了它们的生态重要性(Suttle,2007)。许多研究还提出将噬菌体用于医疗目的(Weber-Dabrowska等人,2001; Merril等人,2003; Harper和Enright,2011; Edgar ,2012; Bikard等人,2014; Citorik等人,2014; Yosef等人, 2014年和2015年)。不幸的是,仅有少数公开的方法详细描述了噬菌体基因组学的基因工程(Selick等人,1988; Marinelli等人,2008; ...

Polysome Fractionation to Analyze mRNA Distribution Profiles
Author:
Date:
2017-02-05
[Abstract]  Eukaryotic cells adapt to changes in external or internal signals by precisely modulating the expression of specific gene products. The expression of protein-coding genes is controlled at the transcriptional and post-transcriptional levels. Among the latter steps, the regulation of translation is particularly important in cellular processes that require rapid changes in protein expression patterns. The translational efficiency of mRNAs is altered by RNA-binding proteins (RBPs) and noncoding (nc)RNAs such as microRNAs (Panda et al., 2014a and 2014b; Abdelmohsen et al., 2014). The impact of factors that regulate selective mRNA translation is a critical question in RNA biology. Polyribosome (polysome) fractionation analysis is a powerful method to assess the association of ... [摘要]  真核细胞通过精确调节特定基因产物的表达来适应外部或内部信号的变化。蛋白质编码基因的表达受到转录和转录后水平的控制。在后面的步骤中,翻译的调节在需要蛋白质表达模式快速变化的细胞过程中特别重要。 mRNA的翻译效率由RNA结合蛋白(RBP)和非编码(nc)RNA如微RNA(Panda等人,2014a和2014b; Abdelmohsen等人)改变2014)。调节选择性mRNA翻译的因素的影响是RNA生物学中的一个关键问题。多核糖体(多核糖体)分馏分析是评估核糖体与给定mRNA的关联的有效方法。它提供了关于该mRNA的翻译状态的有价值的信息,这取决于与它们相关联的核糖体的数目,并且鉴定未翻译的mRNA(Panda等人,2016)。与许多核糖体相关的mRNA形成大量的多核糖体,预计将被主动翻译,而与少数或没有核糖体相关的mRNA有可能翻译不佳。总之,多聚糖分馏分析允许直接测定整个转录组水平的翻译效率以及个体mRNA。

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