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GelRed

Company: Jomar Bioscience, Australia
Catalog#: 41003
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Whole-genome Identification of Transcriptional Start Sites by Differential RNA-seq in Bacteria
Author:
Date:
2020-09-20
[Abstract]  Gene transcription in bacteria often starts some nucleotides upstream of the start codon. Identifying the specific Transcriptional Start Site (TSS) is essential for genetic manipulation, as in many cases upstream of the start codon there are sequence elements that are involved in gene expression regulation. Taken into account the classical gene structure, we are able to identify two kinds of transcriptional start site: primary and secondary. A primary transcriptional start site is located some nucleotides upstream of the translational start site, while a secondary transcriptional start site is located within the gene encoding sequence.

Here, we present a step by step protocol for genome-wide transcriptional start sites determination by differential RNA-sequencing (dRNA-seq) ...
[摘要]  [摘要] 细菌中的基因转录通常起始于起始密码子上游的一些核苷酸。识别SPE cific Ť ranscriptional 小号挞小号ITE (TSS)为遗传操作必需的,因为在许多情况下,起始密码子上游有中涉及的基因表达调控序列元件。考虑到经典的基因结构,我们能够鉴定出两种转录起始位点:一级和二级。主要转录起始位点位于翻译起始位点上游的一些核苷酸上,而次要转录起始位点位于基因编码序列内。

这里,我们提出一步步协议全基因组吨ranscriptional 小号馅饼小号ITES d etermination通过差RNA测序(DRNA 使用肠道病原体-SEQ)福氏痢疾杆菌血清型菌株5A作为M90T模型。但是,该方法可以用于选择的任何其他细菌物种。第一步,使用热酚法从细菌培养物中纯化总RNA。核糖体RNA(rRNA)是使用商业试剂盒通过杂交探针特异性去除的。然后准备一个富含5'- 一磷酸依赖性核酸外切酶(TEX)处理的,富含初级转录本的RNA文库,用于与未进行TEX处理的文库进行比较,然后连接已知序列的RNA接头衔接子,从而确定具有单核苷酸精度的TSS。最后,对RNA进行处理以制备Illumina测序文库,并按购买的服务进行测序。通过内部生物信息学分析鉴定TSS。

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In vivo Analysis of Cyclic di-GMP Cyclase and Phosphodiesterase Activity in Escherichia coli Using a Vc2 Riboswitch-based Assay
Author:
Date:
2018-03-05
[Abstract]  Cyclic di-guanosine monophosphate (c-di-GMP) is a ubiquitous second messenger that regulates distinct aspects of bacterial physiology. It is synthesized by diguanylate cyclases (DGCs) and hydrolyzed by phosphodiesterases (PDEs). To date, the activities of DGC and PDE are commonly assessed by phenotypic assays, mass spectrometry analysis of intracellular c-di-GMP concentration, or riboswitch-based fluorescent biosensors. However, some of these methods require cutting-edge equipment, which might not be available in every laboratory. Here, we report a new simple, convenient and cost-effective system to assess the function of DGCs and PDEs in E. coli. This system utilizes the high specificity of a riboswitch to c-di-GMP and its ability to regulate the expression of a downstream ... [摘要]  环状二磷酸鸟苷(c-di-GMP)是一种无处不在的第二信使,它调节细菌生理学的不同方面。 它由diguanylate环化酶(DGC)合成并被磷酸二酯酶(PDE)水解。 迄今为止,通常通过表型分析,细胞内c-di-GMP浓度的质谱分析或基于核糖开关的荧光生物传感器来评估DGC和PDE的活性。 但是,其中一些方法需要尖端设备,而这些设备可能不适用于每个实验室。 在这里,我们报告了一个新的简单,方便和具有成本效益的系统,用于评估E中DGC和PDE的功能。大肠杆菌。 该系统利用核糖开关对c-di-GMP的高特异性及其响应于c-di-GMP浓度而调节下游β-半乳糖苷酶报道基因的表达的能力。 在该协议中,我们描述了该系统的构建及其用于评估DGC和PDE酶的活性。

【背景】Cyclic-di-GMP是细菌中重要且无处不在的第二信使,其调节各种过程,例如运动到衰退转变,生物膜形成,毒力和细胞周期进展(Römling等人, ,2013)。 GG(D / ...

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