| Preparation of Yeast tRNA Sample for NMR Spectroscopy
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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 ...
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| MNase Digestion for Nucleosome Mapping in Neurospora
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Author:
Date:
2016-06-05
[Abstract] Digestion of chromatin by micrococcal nuclease MNase followed by high throughput sequencing allows us to determine the location and occupancy of nucleosomes on the genome. Here in this protocol we have described optimized conditions of MNase digestion of filamentous fungus Neurospora crassa chromatin without a requirement of a nuclear fractionation step.
[摘要] 通过微球菌核酸酶MNase消化染色质，然后高通量测序允许我们确定核小体在基因组上的位置和占据。 在这个协议中，我们描述了MNase消化丝状真菌粗糙链孢霉染色体的优化条件，而不需要核分馏步骤。
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| Zonal Sedimentation Analysis on Sucrose Gradients
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Author:
Date:
2014-04-20
[Abstract] Zonal sedimentation analysis on sucrose gradients allows estimation of the molecular size of an individual protein or a protein complex by centrifugation at a constant speed under nondenaturing conditions. This method is particularly suitable for globular proteins like the influenza A virus (IAV) protein hemagglutinin (HA). Here, I describe step by step a protocol used to evaluate the oligomeric state of recombinant HA trimers (Magadan et al., 2013).
[摘要] 对蔗糖梯度的区域沉降分析允许通过在非变性条件下以恒定速度离心来估计单个蛋白质或蛋白质复合物的分子大小。 该方法特别适用于如甲型流感病毒（IAV）蛋白血凝素（HA）的球状蛋白。 在这里，我逐步描述用于评估重组HA三聚体的寡聚状态的方案（Magadan等人，2013）。
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