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NanoDropTM One/OneC Microvolume UV-Vis Spectrophotometer with Wi-Fi

Company: Thermo Fisher Scientific
Catalog#: NanoDropTM One/OneC
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In planta Transcriptome Analysis of Pseudomonas syringae
Author:
Date:
2018-09-05
[Abstract]  Profiling bacterial transcriptome in planta is challenging due to the low abundance of bacterial RNA in infected plant tissues. Here, we describe a protocol to profile transcriptome of a foliar bacterial pathogen, Pseudomonas syringae pv. tomato DC3000, in the leaves of Arabidopsis thaliana at an early stage of infection using RNA sequencing (RNA-Seq). Bacterial cells are first physically isolated from infected leaves, followed by RNA extraction, plant rRNA depletion, cDNA library synthesis, and RNA-Seq. This protocol is likely applicable not only to the A. thaliana–P. syringae pathosystem but also to different plant-bacterial combinations. [摘要]  由于受感染植物组织中细菌RNA的丰度低,因此在植物中分析细菌转录组具有挑战性。 在这里,我们描述了一个描述叶子细菌病原体转录组的协议, Pseudomonas syringae pv。 番茄 DC3000,在感染早期的拟南芥叶中使用RNA测序(RNA-Seq)。 首先从感染的叶子中物理分离细菌细胞,然后进行RNA提取,植物rRNA消耗,cDNA文库合成和RNA-Seq。 该协议不仅适用于 A.拟南芥-P。 syringae 病理系统,但也适用于不同的植物 - 细菌组合。

【背景】植物已经进化出先天免疫系统以抵御病原体攻击。在过去的几十年中,已经深入研究了病原体识别和免疫信号传导途径的分子机制。然而,植物免疫如何影响病原体代谢以抑制病原体生长几乎不被理解,因为在植物中分析病原体反应很困难。在细菌病原体的情况下,植物叶内的转录组分析很难研究,因为细菌mRNA的量远低于植物的数量;由于植物中细菌的人口密度低,在感染的早期阶段尤其具有挑战性。为克服这一局限性,我们建立了一种从感染的植物叶片中分离细菌并用RNA-Seq分析细菌转录组的方法。该方法已成功用于分析模型细菌病原体 Pseudomonas syringae pv的转录组。 番茄 DC3000在模式植物 Arabidopsis thaliana 中的各种条件下(Nobori et al。,2018). ...

Detection and Analysis of Circular RNAs by RT-PCR
Author:
Date:
2018-03-20
[Abstract]  Gene expression in eukaryotic cells is tightly regulated at the transcriptional and posttranscriptional levels. Posttranscriptional processes, including pre-mRNA splicing, mRNA export, mRNA turnover, and mRNA translation, are controlled by RNA-binding proteins (RBPs) and noncoding (nc)RNAs. The vast family of ncRNAs comprises diverse regulatory RNAs, such as microRNAs and long noncoding (lnc)RNAs, but also the poorly explored class of circular (circ)RNAs. Although first discovered more than three decades ago by electron microscopy, only the advent of high-throughput RNA-sequencing (RNA-seq) and the development of innovative bioinformatic pipelines have begun to allow the systematic identification of circRNAs (Szabo and Salzman, 2016; Panda et al., 2017b; Panda et al., ... [摘要]  真核细胞中的基因表达在转录和转录后水平受到严格调控。 mRNA转录,mRNA转录和mRNA翻译等后转录过程由RNA结合蛋白(RBPs)和非编码(nc)RNAs控制。大量的ncRNA家族包含多种调控RNA,如microRNAs和长的非编码(lnc)RNAs,但也是探索不足的一类环状RNAs。虽然三十多年前电子显微镜首次发现,但只有高通量RNA测序(RNA-seq)的出现和创新生物信息学管道的开发已经开始允许系统鉴定circRNA(Szabo和Salzman,2016;熊猫,2017b;熊猫等,2017c)。然而,通过RNA测序鉴定的真正的circRNA的验证需要其他分子生物学技术,包括常规或定量(q)聚合酶链反应(PCR)和Northern印迹分析(Jeck和Sharpless,2014)的逆转录(RT)。使用不同引物的环状RNA的RT-qPCR分析已被广泛用于检测,验证和有时定量circRNA(Abdelmohsen等人,2015和2017; Panda等人, ,2017b)。如在此详述的,设计为跨越循环RNA后接连接序列的分歧引物可以特异性扩增circRNA而不是对应的线性RNA。总之,使用不同引物的RT-PCR分析允许直接检测和定量circRNA。

【背景】CircRNAs是共价闭合的,缺少5'或3'末端的单链RNA。虽然它们的起源知之甚少,但它们可以通过称为反向剪接的过程从前体mRNA产生(Panda等人,2017d; ...

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