| 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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| Low-cost and High-throughput RNA-seq Library Preparation for Illumina Sequencing from Plant Tissue
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Author:
Date:
2020-10-20
[Abstract] Transcriptome analysis can provide clues to biological processes affected in different genetic backgrounds or/and under various conditions. The price of RNA sequencing (RNA-seq) has decreased enough so that medium- to large-scale transcriptome analyses in a range of conditions are feasible. However, the price and variety of options for library preparation of RNA-seq can still be daunting to those who would like to use RNA-seq for their first time or for a single experiment. Among the criteria for selecting a library preparation protocol are the method of RNA isolation, nucleotide fragmentation to obtain desired size range, and library indexing to pool sequencing samples for multiplexing. Here, we present a high-quality and a high-throughput option for preparing libraries from ...
[摘要] [摘要] 转录组分析可以为不同遗传背景或不同条件下的生物学过程提供线索。RNA测序（RNA-seq）的价格已经下降到足够低的程度，因此在各种条件下进行中大规模转录组分析是可行的。然而，对于那些希望第一次使用RNA-seq或进行单个实验的人来说，RNA-seq库制备的价格和各种选择仍然是令人望而生畏的。选择文库制备方案的标准包括RNA分离方法、核苷酸片段化以获得所需的大小范围，以及文库索引以汇集测序样本进行多路复用。在这里，我们提出了一个高质量和高通量的选择，从多聚腺苷酸mRNA制备文库用于转录组分析。高质量和高通量的方案选择都包括通过磁珠使poly-A尾部沉淀，cDNA合成，然后通过Tn5介导的“标记”同时裂解和添加适配器的步骤。该方案的所有步骤均已通过拟南芥叶片和幼苗组织的验证，并简化为协同工作，在资金和时间上成本最低，因此旨在为转录组分析提供一个初学者友好的从开始到完成的RNA序列库制备。
[背景] 通过Southern印迹、expressed sequence ...
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| Mapping mRNA-18S rRNA Contacts Within Translation Initation Complex by Means of Reverse Transcriptase Termination Sites and RNAseq
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Author:
Date:
2020-08-20
[Abstract] The nucleotides involved in RNA-RNA interaction can be tagged by chemical- or UV-induced crosslinking, and further identified by classical or modern high throughput techniques. The contacts of mRNA with 18S rRNA that occur along the mRNA channel of 40S subunit have been mapped by site-specific UV crosslinking followed by reverse transcriptase termination sites (RTTS) using radioactive or fluorescent oligonucleotides. However, the sensitivity of this technique is restricted to the detection of those fragments that resulted from the most frequent crosslinkings. Here, we combined RTTS with RNAseq to map the mRNA-18S rRNA contacts with a much deeper resolution. Although aimed to detect the interaction of mRNA with the ES6S region of 18S rRNA, this technique can also be applied to map the ...
[摘要] [摘要 ] 可以通过化学或紫外线诱导的交联来标记参与RNA-RNA相互作用的核苷酸，并通过经典或现代的高通量技术对其进行进一步鉴定。沿着40S亚基的mRNA通道发生的18S rRNA与mRNA的接触已通过位点特异性UV交联进行了定位，随后使用放射性或荧光寡核苷酸进行了逆转录酶终止位点（RTTS）。但是，该技术的敏感性仅限于检测由最频繁的交联产生的那些片段。在这里，我们将RTTS与RNAseq结合使用，以更深的分辨率绘制了mRNA-18S rRNA接触图。尽管旨在检测mRNA与18S rRNA的ES6S区域的相互作用，但该技术也可以用于绘制mRNA与其他非编码RNA分子的相互作用（在转录，剪接或RNA介导的转录后调控过程中（例如，snRNA，microRNA和lncRNA）。
[背景 ] 是与非编码RNA的mRNA的相互作用volved mRNA中的生命周期的每个步骤，从它的生物合成和处理进入细胞核至细胞质中的翻译和最终降解。这些相互作用可以在大分子机器核糖体和剪接体，以及在较小的复合物如RISC或者发生（RNA诱导的沉默复合物）或lncRNA介导的基因表达调节期间（皮萨列夫等人，2008; Engreitz 。等人，2014 Sharma ...
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