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Company: Gilson
Catalog#: 4642080
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Extracellular RNA Isolation from Biofilm Matrix of Pseudomonas aeruginosa
Author:
Date:
2020-11-05
[Abstract]  

Most bacteria in natural ecosystems form biofilms-a bacterial community, surrounded by a polymer matrix that consists mostly of exopolysaccharides, proteins, and nucleic acids. Extracellular RNA as a matrix component is involved in biofilm formation-the fact that was confirmed by direct detection of extracellular RNA in the biofilm matrix, and by an interruption of the biofilm's structure with RNases. Number of protocols describing isolation of RNA from biofilm matrix are limited and usually involve uncommon equipment and reagents. Here we describe simple method for extracellular RNA isolation from biofilm matrix using basic laboratory reagent and equipment. Key steps of the protocol include separation of matrix and bacterial cells with high ionic solution of NaCl, RNA precipitation with

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[摘要]  [摘要]自然生态系统中的大多数细菌形成生物膜 –一个细菌群落,周围环绕着聚合物基质,该基质主要由胞外多糖,蛋白质和核酸组成。细胞外RNA作为基质成分参与生物膜的形成,这一事实已通过直接检测生物膜基质中的细胞外RNA以及通过RNase破坏生物膜结构而得到证实。。描述从生物膜基质中分离RNA的方案数量有限,通常涉及不常见的设备和试剂。在这里,我们描述了使用基本的实验室试剂和设备从生物膜基质分离细胞外RNA的简单方法。该方案的关键步骤包括用高离子浓度的NaCl溶液分离基质和细菌细胞,用LiCl沉淀RNA,并选择使用廉价的色谱柱进行质粒DNA分离,而不是使用专门的RNA试剂盒进行纯化。所描述的方案允许在不到一天的时间内(不包括生物膜生长的时间)分离适用于进一步的分子生物学程序(例如测序,RT-PCR和克隆)的细胞外RNA。

[背景]生物膜基质可抵抗不同的影响(抗菌药物,消毒剂,机械力),并为协调协调不同过程创造了环境(Svenningsen,2018年)。RNA存在于细胞外生物膜基质中,并形成RNA-DNA的主要交联弹性共聚物(Seviour等,2019)。用核糖核酸酶处理生物膜导致生物膜质量的重大损失,并强调了RNA对于维持生物膜完整性的重要性(Lee等人,2019)。同时,RNA在生物膜基质中的来源和作用仍未得到很好的研究。

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Easy and Efficient Permeabilization of Cyanobacteria for in vivo Enzyme Assays Using B-PER
Author:
Date:
2018-01-05
[Abstract]  Cyanobacteria are photosynthetic bacteria that thrive in diverse ecosystems and play major roles in the global carbon cycle. The abilities of cyanobacteria to fix atmospheric CO2 and to allocate the fixed carbons to chemicals and biofuels have attracted growing attentions as sustainable microbial cell factories. A better understanding of activities of enzymes involved in the central carbon metabolism might lead to increased product yields. Currently, cell-free lysates are widely used for the determination of intracellular enzyme activities. However, due to thick cell walls in cyanobacteria, lysis of cyanobacterial cells is inefficient and often laborious. The present protocol describes an easy and efficient method to permeabilize cyanobacterial cells, without lysing them, and ... [摘要]  蓝细菌是光合细菌,在不同的生态系统中繁衍,在全球碳循环中发挥重要作用。 蓝藻固定大气CO 2和将固定碳分配到化学品和生物燃料的能力作为可持续的微生物细胞工厂已经引起越来越多的关注。 更好地了解参与中央碳代谢的酶的活性可能导致产物产量增加。 目前,无细胞裂解物被广泛用于细胞内酶活性的测定。 然而,由于蓝细菌细胞壁较厚,蓝细菌细胞的裂解效率低下且费力。 目前的方案描述了一种简单而有效的方法来渗透蓝藻细胞,而不溶解它们,并直接使用透化细胞来测定体内代谢酶活性。

【背景】我们之前已经报道了使用B-PER TM试剂(Thermo Fisher Science)(Rasmussen等人,2016)简单,有效且可扩展的蓝细菌的透化。 B-PER TM TM试剂含有溶解在Tris-HCl缓冲液中的未公开的温和洗涤剂,通常用于裂解细菌细胞如大肠杆菌(Escherichia coli)。偶然地,我们发现B-PER TM TM试剂渗透蓝细菌细胞而不是溶解它们,可能是因为厚的蓝细菌细胞壁(Hoiczyk和Hansel,2000)赋予了试剂中使用的去污剂的抗性。在生物技术感兴趣的蓝细菌中进行通透化。聚球蓝细菌PCC 7002(以下简称“Synechococcus”7002)和“Synechocystis”sp。 PCC ...

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