| Immuno-electrophysiology on Neuromuscular Junctions of Drosophila Third Instar Larva
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Author:
Date:
2021-02-05
[Abstract] Alterations in synaptic transmission are critical early events in neuromuscular disorders. However, reliable methodologies to analyze the functional organization of the neuromuscular synapses are still needed. This manuscript provides a detailed protocol to analyze the molecular assembly of the neuromuscular synapses through immune-electrophysiology in Drosophila melanogaster. This technique allows the quantification of the molecular behavior of the neuromuscular synapses by correlating the structural configuration of the synaptic boutons with their electrical activity.
[摘要] [摘要]突触传递的改变是神经肌肉疾病的关键早期事件。但是，仍然需要可靠的方法来分析神经肌肉突触的功能组织。此马努脚本提供了详细的协议，通过在免疫电分析神经肌肉突触的分子组装果蝇黑腹果蝇。该技术通过使突触钮扣的结构构型与其电活动相关联，可以量化神经肌肉突触的分子行为。
[背景]果蝇三龄幼虫的神经肌肉接头（NMJ）的功能组织在研究突触形成和功能的分子机制方面具有突出的优势（Feiguin等，2009 ; Godena等，2011; Romano等。（2014年和2015年；Strah等人，2020年），它在包括人类在内的其他物种中似乎是保守的。在这方面，果蝇NMJs的解剖组织是由多个突触钮扣构成的，这些突触钮扣是在运动轴突的最终乔木形成的。这些结构的分化和维持负责骨骼肌的神经支配，并暗示不同分子的协调作用，专门用于建立细胞接触以及释放，接收和整合神经递质信号传导所需的机制。此外，在果蝇中开发的功能强大的遗传工具以及神经系统对单个神经元的解剖学解析，提供了难得的机会，可以在可区分细胞的组织中进行全基因组范围的分子表型无偏搜索。尽管果蝇已经存在可视化神经肌肉突触建立的单独协议（Sabeva和Bykhovskaia，2017 ; Goel等人，2019 ...
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| Random Insertional Mutagenesis of a Serotype 2 Dengue Virus Clone
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Author:
Date:
2018-08-20
[Abstract] Protein tagging is a powerful method of investigating protein function. However, modifying positive-strand RNA virus proteins in the context of viral infection can be particularly difficult as their compact genomes and multifunctional proteins mean even small changes can inactivate or attenuate the virus. Although targeted approaches to functionally tag viral proteins have been successful, these approaches are time consuming and inefficient. A strategy that has been successfully applied to several RNA viruses is whole-genome transposon insertional mutagenesis. A library of viral genomes, each containing a single randomly placed small insertion, is selected by passaging in cell culture and the insertion sites can be identified using Next Generation Sequencing (NGS). Here we describe a ...
[摘要] 蛋白质标记是研究蛋白质功能的有效方法。然而，在病毒感染的情况下修饰正链RNA病毒蛋白可能特别困难，因为它们的紧密基因组和多功能蛋白意味着即使很小的变化也可以使病毒失活或减弱。尽管功能性标记病毒蛋白的靶向方法已经成功，但这些方法耗时且效率低。已经成功应用于几种RNA病毒的策略是全基因组转座子插入诱变。通过细胞培养中的传代选择病毒基因组文库，每个文库含有单个随机放置的小插入，并且可以使用下一代测序（NGS）鉴定插入位点。在这里，我们描述了用于登革病毒16681株血清型2的转座子诱变的方案。含有短随机放置插入物的突变登革病毒文库通过哺乳动物细胞传代，插入由有活力后代的NGS定位。该方案分为四个阶段：登革热cDNA克隆的转座子诱变，病毒基因组转染到允许细胞，分离病毒后代基因组和测序文库制备。
【背景】 ...
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| RNA Immunoprecipitation (RIP) Sequencing of Pri-miRNAs Associated with the Dicing Complex in Arabidopsis
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Author:
Date:
2018-07-05
[Abstract] RNA immunoprecipitation (RIP) is an antibody-based technique used to map in vivo RNA-protein interactions. DBR1, an RNA debranching enzyme, is responsible for the debranching of lariat RNA, for the degradation and turnover of lariat RNAs. It is well known that primary miRNA (Pri-miRNA) is recognized and further processed into mature miRNA by the Dicing complex mainly composed of DCL1 and HYL1. Due to the low abundance of pri-miRNAs, RIP followed qRT-PCR has been widely used to evaluate the binding efficiency of the Dicing complex with pri-miRNAs in previous studies. Therefore, the genome-wide evaluation of the Dicing complex with pri-miRNAs is lacking. With the improvement of high-throughput sequencing technologies, we successfully used RIP-seq to compare the binding efficiency ...
[摘要] RNA免疫沉淀（RIP）是一种基于抗体的技术，用于绘制体内 RNA-蛋白质相互作用。 DBR1是一种RNA脱支酶，负责套索RNA的脱支，用于套索RNA的降解和转换。众所周知，主要miRNA（Pri-miRNA）被主要由DCL1和HYL1组成的切割复合物识别并进一步加工成成熟miRNA。由于pri-miRNA的丰度较低，RIP随后的qRT-PCR已被广泛用于评估切割复合物与pri-miRNA在先前研究中的结合效率。因此，缺乏对具有pri-miRNA的切割复合物的全基因组评估。随着高通量测序技术的改进，我们成功地使用RIP-seq比较了Dicing复合物与野生型和 dbr1-2 突变体之间的pri-miRNA的结合效率。 。在该方案中，我们提供了在两种不同基因型之间的HYL1-YFP和DCL1-YFP转基因植物中使用GFP捕获珠的RIP-seq的详细描述。该方法可用于评估pri-miRNA与拟南芥中的切割复合物的结合，并且它可以应用于植物中的其他RNA结合蛋白。
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