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Ethanol absolute ≥99.8%, AnalaR NORMAPUR® ACS, Reag. Ph. Eur. analytical reagent

Company: VWR
Catalog#: 20821.321
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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). ...

Analysis of in vivo Interaction between RNA Binding Proteins and Their RNA Targets by UV Cross-linking and Immunoprecipitation (CLIP) Method
Author:
Date:
2017-05-20
[Abstract]  RNA metabolism is tightly controlled across different tissues and developmental stages, and its dysregulation is one of the molecular hallmarks of cancer. Through direct binding to specific sequence element(s), RNA binding proteins (RBPs) play a pivotal role in co- and post-transcriptional RNA regulatory events. We have recently demonstrated that, in pancreatic cancer cells, acquisition of a drug resistant (DR)-phenotype relied on upregulation of the polypyrimidine tract binding protein (PTBP1), which in turn is recruited to the pyruvate kinase pre-mRNA and favors splicing of the oncogenic PKM2 variant. Herein, we describe a step-by-step protocol of the ultraviolet (UV) light cross-linking and immunoprecipitation (CLIP) method to determine the direct binding of an RBP to specific regions ... [摘要]  RNA代谢在不同的组织和发育阶段被严格控制,其失调是癌症的分子特征之一。 通过直接结合特定的序列元件,RNA结合蛋白(RBP)在共转录和转录后调控事件中起关键作用。 我们最近证实,在胰腺癌细胞中,获得耐药(DR) - 表型取决于多聚嘧啶区结合蛋白(PTBP1)的上调,其又被引入丙酮酸激酶前mRNA并有利于剪接 致癌性PKM2变体。 在这里,我们描述了紫外(UV)光交联和免疫沉淀(CLIP)方法的逐步方案,以确定RBP与贴壁人细胞系中其目标RNA的特定区域的直接结合。

背景 在细胞核中转录时,新生的RNA立即与被称为RNA结合蛋白(RBP)的反式因子立即组装。这些因子直接与RNA分子中特定的顺式调控序列相互作用,从而形成核糖核蛋白(RNP)复合物(Dreyfuss et al。,2002; ...

Polyethylene Glycol-mediated Transformation of Drechmeria coniospora
Author:
Date:
2017-03-05
[Abstract]  Drechmeria coniospora is a nematophagous fungus and potential biocontrol agent. It belongs to the Ascomycota. It is related to Hirsutella minnesotensis, another nematophagous fungus but, phylogenetically, it is currently closest to the truffle parasite Tolypocladium ophioglossoides. Together with its natural host, Caenorhabditis elegans, it is used to study host-pathogen interactions. Here, we report a polyethylene glycol-mediated transformation method (Turgeon et al., 2010; Ochman et al., 1988) for this fungus. The protocol can be used to generate both knock-in or knock-out strains (Lebrigand et al., 2016). [摘要]  Drechmeria coniospora 是一种无害真菌和潜在的生物防治剂。它属于子囊菌纲。它与另外一种没食子菌真菌Hirsutella minnesotensis有关,但在系统发育中,它目前最接近松露寄生虫Tolypocladium ophioglossoides 。与其天然宿主,秀丽隐杆线虫一起,它用于研究宿主 - 病原体相互作用。在这里,我们报告了这种真菌的聚乙二醇介导的转化方法(Turgeon等人,2010; Ochman等人,1988)。该方案可用于产生敲入或敲除菌株(Lebrigand等人,2016)。

背景 D。 coniospora 已被开发为用于研究先天免疫的模型病原体。 elegans (Lebrigand等人,2016和其中的参考文献)。 D。 coniospora 在标准生长培养基上缓慢增长,使得体外研究困难,难以开发转化方法。我们在这里报告一种允许快速生产大量的D的文化方法。 coniospora ,开辟了其遗传修饰的道路。聚乙二醇介导的转化可能是广泛应用于修饰真菌的最简单的方法。我们发现它可以与一起使用。 coniospora ,因此提供了故意修改其基因组的第一种方法。

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