{{'Search' | translate}}
 

Amicon Ultra-15 Centrifugal Filter Unit

Company: Millipore Sigma
Catalog#: UFC900308
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 ...

Electrophoretic Mobility Shift Assay of in vitro Phosphorylated RNA Polymerase II Carboxyl-terminal Domain Substrates
Author:
Date:
2020-06-20
[Abstract]  Eukaryotic RNA polymerase II transcribes all protein-coding mRNAs and is highly regulated. A key mechanism directing RNA polymerase II and facilitating the co-transcriptional processing of mRNAs is the phosphorylation of its highly repetitive carboxyl-terminal domain (CTD) of its largest subunit, RPB1, at specific residues. A variety of techniques exist to identify and quantify the degree of CTD phosphorylation, including phosphorylation-specific antibodies and mass spectrometry. Electrophoretic mobility shift assays (EMSAs) have been utilized since the discovery of CTD phosphorylation and continue to represent a simple, direct, and widely applicable approach for qualitatively monitoring CTD phosphorylation. We present a standardized method for EMSA analysis of recombinant GST-CTD ... [摘要]  [摘要 ] 真核RNA聚合酶II转录所有编码蛋白质的mRNA,并且受到高度调节。指导RNA聚合酶II并促进mRNA的共转录加工的关键机制是其高度重复的羧基末端结构域(CTD)的磷酸化。最大的亚基RPB1位于特定残基。存在多种鉴定和定量CTD磷酸化程度的技术,包括磷酸化特异性抗体和质谱法。自发现CTD磷酸化和本文提出了一种标准化的方法,用于EMSA分析被多种CTD激酶磷酸化的重组GST-CTD底物的EMSA方法,以及在变性/还原和还原条件下分析样品的策略。提供了半本地条件。此方法表示简单,直接,以及使用分子生物学实验室通用的设备监测重组底物中CTD磷酸化的可重现方法,该设备可轻松应用于下游分析,包括免疫印迹和质谱分析。

[背景 ] 真核生物RNA聚合酶II(RNAPII)产生所有蛋白质编码的mRNA,小核,小核仁,和许多微小RNA (杰罗尼莫等,2013;梅菲尔德。等,2016) 。各种机制中规范RNAPII活动要赋予特异性基因表达和促进生物处理工艺。在这些是直接翻译后修饰中RNAPII自己在形式的磷酸化(梅菲尔德等,2016) ,脯氨酰异构(梅菲尔德等,2015) ,甲基化(迪亚斯等人,2015年)和乙酰化(交银施罗德等,2013) 。一些研究最多的修饰是磷酸化的C端结构域RNAPII最大的亚基RPB1中(CTD) ...

Comments