{{'Search' | translate}}
 

Klebsiella pneumoniae, serotype 2

Company: ATCC
Catalog#: 43816
Bio-protocol()
Company-protocol()
Other protocol()

Preparation of Yeast tRNA Sample for NMR Spectroscopy
Author:
Date:
2020-06-20
[Abstract]  Transfer RNAs (tRNAs) are heavily decorated with post-transcriptional modifications during their biosynthesis. To fulfil their functions within cells, tRNAs undergo a tightly controlled biogenesis process leading to the formation of mature tRNAs. In addition, functions of tRNAs are often modulated by their modifications. Although the biological importance of post-transcriptional RNA modifications is widely appreciated, methods to directly detect their introduction during RNA biosynthesis are rare and do not easily provide information on the temporal nature of events. To obtain information on the tRNA maturation process, we have developed a methodology, using NMR as a tool to monitor tRNA maturation in a non-disruptive and continuous fashion in cellular extracts. By following the ... [摘要]  [摘要 ] 转移RNA(tRNA )在其生物合成过程中大量修饰有转录后修饰。为了在细胞内履行其功能,tRNA 经历了严格控制的生物生成过程,导致了成熟的tRNA 的形成。此外,tRNA的功能通常是虽然转录后修饰RNA的生物学重要性被广泛理解,方法直接检测它们的RNA生物合成过程中引入是罕见的,并且不容易提供上events.To的时间特性信息获取的信息的tRNA 成熟 在此过程中,我们开发了一种方法,使用NMR作为监测细胞提取物中tRNA 成熟的无中断和连续方式。通过模型酵母tRNA 的时间分辨NMR 成熟,我们发现修饰是该方法的实施需要对具有不同修饰状态的tRNA 样品进行NMR光谱学分析,以鉴定各个修饰的NMR特征。此处将介绍用于NMR光谱分析修饰途径的tRNA 样品的生产,并在酵母tRNA Phe 上进行例证,但可以通过更改构建体的序列扩展到其他tRNA 。该方案描述了未修饰的生产通过体外转录获得tRNA 样品,并通过在大肠杆菌中重组表达tRNA 产生修饰的tRNA 样品。大肠杆菌。

[背景 ] 在生活的各个领域,合成和RNA的成熟包括在特定地点的核苷酸的转录后的化学修饰。在不同的RNA家族,tRNA基因不仅显示最高多种化学修饰,而且密度最高每转录修饰(〜中经修饰的核苷酸8-25%的tRNA 各种生物体的)(Boccaletto ...

A Small RNA Isolation and Sequencing Protocol and Its Application to Assay CRISPR RNA Biogenesis in Bacteria
Author:
Date:
2018-02-20
[Abstract]  Next generation high-throughput sequencing has enabled sensitive and unambiguous analysis of RNA populations in cells. Here, we describe a method for isolation and strand-specific sequencing of small RNA pools from bacteria that can be multiplexed to accommodate multiple biological samples in a single experiment. Small RNAs are isolated by polyacrylamide gel electrophoresis and treated with T4 polynucleotide kinase. This allows for 3’ adapter ligation to CRISPR RNAs, which don’t have pre-existing 3’-OH ends. Pre-adenylated adapters are then ligated using T4 RNA ligase 1 in the absence of ATP and with a high concentration of polyethylene glycol (PEG). The 3’ capture step enables precise determination of the 3’ ends of diverse RNA molecules. Additionally, a random hexamer in the ligated ... [摘要]  新一代高通量测序技术能够对细胞中的RNA群体进行敏感和明确的分析。在这里,我们描述了一种从细菌中分离和链特异性测序小RNA池的方法,所述细菌可以在单个实验中多路复用以容纳多个生物样品。小RNA通过聚丙烯酰胺凝胶电泳分离并用T4多核苷酸激酶处理。这允许3'衔接头连接至CRISPR RNA,其不具有预先存在的3'-OH末端。然后使用T4 RNA连接酶1在不存在ATP和高浓度聚乙二醇(PEG)的情况下将前腺苷酸化的衔接子连接。 3'捕获步骤能够精确测定不同RNA分子的3'末端。此外,连接适配器中的随机六聚体有助于控制潜在的下游扩增偏差。逆转录后,将cDNA产物环化并通过PCR制备文库。我们显示扩增的文库不需要通过凝胶电泳可见,以期望产物的有效测序。使用这种方法,我们通常从少量纯化的小RNA制备RNA测序文库。该协议适合于通过对成熟的CRISPR RNA进行测序来测定细菌中的CRISPR RNA生物合成,但可以用于测序不同类型的小RNA。我们还提供了一个完整的数据处理管道示例,并提供了运行所提供脚本的说明。


【背景】与聚集的经常散布的短回文重复序列(CRISPR)相关的遗传模块赋予不同的原核宿主适应性免疫(Barrangou et ...

Comments