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Shaking incubator for yeast cultures

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Company: Infors
Catalog#: Multitron Standard
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Preparation of Sequencing RNA Libraries through Chemical Cross-linking Coupled to Affinity Purification (cCLAP) in Saccharomyces cerevisiae
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Date:
2018-10-05
[Abstract]  Ribonucleoprotein particles (mRNPs) are complexes consisting of mRNAs and RNA-binding proteins (RBPs) which control mRNA transcription localization, turnover, and translation. Some mRNAs within the mRNPs have been shown to undergo degradation or storage. Those transcripts can lack general mRNA elements, like the poly(A) tail or 5’ cap structure, which prevent their identification through the application of widely-used approaches like oligo(dT) purification. Here, we describe a modified cross-linking affinity purification protocol (cCLAP) based on existing cross-linking and immunoprecipitation (CLIP) methods to isolate mRNAs which could be deadenylated, decapped and/or partially degraded in mRNPs, opening the possibility to detect different types of non-coding RNAs (ncRNAs). Once isolated, ... [摘要]  核糖核蛋白颗粒(mRNP)是由mRNA和RNA结合蛋白(RBP)组成的复合物,其控制mRNA转录定位,转换和翻译。已显示mRNP内的一些mRNA经历降解或储存。那些转录物可能缺乏一般的mRNA元件,如poly(A)尾或5'帽结构,这通过应用广泛使用的方法如oligo(dT)纯化来阻止它们的鉴定。在这里,我们描述了基于现有的交联和免疫沉淀(CLIP)方法的修饰的交联亲和纯化方案(cCLAP),以分离mRNP中可被去腺苷酸化,去除和/或部分降解的mRNA,从而开启了检测不同的可能性。非编码RNA(ncRNA)的类型。分离后,将RNA进行衔接子连接,然后进行下一代测序(NGS)。由于快速有效的交联和淬灭步骤,该方案也适用于瞬时诱导的mRNP颗粒。实例包括由外在应激物触发的处理体(PB)或应力颗粒(SG)。其重现性和广泛应用使该方案成为研究特定RNP的RNA组成的有用且有力的工具。
【背景】mRNP内转录物的表征对于理解细胞转录和转录后过程至关重要。通过交联和免疫沉淀,然后通过RNA-Seq从mRNP颗粒中分离RNA已经成为鉴定mRNA靶标的常用方法(Tagwerker et al。,2006; Hafner et al。,2010; Kishore et al。,2011)。 ...

Design of Hybrid RNA Polymerase III Promoters for Efficient CRISPR-Cas9 Function
Author:
Date:
2018-03-20
[Abstract]  The discovery of the CRISPR-Cas9 system from Streptococcus pyogenes has allowed the development of genome engineering tools in a variety of organisms. A frequent limitation in CRISPR-Cas9 function is adequate expression levels of sgRNA. This protocol provides a strategy to construct hybrid RNA polymerase III (Pol III) promoters that facilitate high expression of sgRNA and improved CRISPR-Cas9 function. We provide selection criteria of Pol III promoters, efficient promoter construction methods, and a sample screening technique to test the efficiency of the hybrid promoters. A hybrid promoter system developed for Yarrowia lipolytica will serve as a model. [摘要]  来自化脓性链球菌的CRISPR-Cas9系统的发现使得在各种生物体中开发基因组工程工具成为可能。 CRISPR-Cas9功能的频繁限制是足够的sgRNA表达水平。 该协议提供了构建杂合RNA聚合酶III(Pol III)启动子的策略,其促进sgRNA的高表达和改善的CRISPR-Cas9功能。 我们提供Pol III启动子的选择标准,有效的启动子构建方法以及样品筛选技术来检测杂合启动子的效率。 为解脂耶氏酵母开发的杂交启动子系统将用作模型。

【背景】CRISPR(成簇定期间隔短回文重复序列)是细菌中发现的DNA序列的集合,其中含有先前曝光的病毒DNA片段(Marraffini和Sontheimer,2010)。片段被称为间隔区DNA,并且它们侧面是短的,重复的回文序列。细菌使用这些存储的间隔序列作为模板来表达RNA,以识别和攻击再次暴露的特定病毒。当与CRISPR相关(Cas)蛋白结合时,CRISPR-Cas系统可以识别和切割外源DNA或RNA,破坏病毒并保护宿主免受重复感染(Barrangou,2013)。

一种特定的CRISPR系统,来自化脓链球菌的II型CRISPR-Cas9已经被修改成用于基因组编辑的更简单的系统。利用这个系统,研究人员能够设计特定的单引导RNA(sgRNA)序列,它与具有上游原型间隔区相邻基序(PAM;'NGG')的目的基因的20bp序列互补(Jinek ...

Trimolecular Fluorescence Complementation (TriFC) Assay for Direct Visualization of RNA-Protein Interaction in planta
Author:
Date:
2017-10-20
[Abstract]  RNA-Protein interactions play important roles in various eukaryotic biological processes. Molecular imaging of subcellular localization of RNA/protein complexes in plants is critical for understanding these interactions. However, methods to image RNA-Protein interactions in living plants have not yet been developed until now. Recently, we have developed a trimolecular fluorescence complementation (TriFC) system for in vivo visualization of RNA-Protein interaction by transient expression in tobacco leaves. In this method, we combined conventional bimolecular fluorescence complementation (BiFC) system with MS2 system (phage MS2 coat protein [MCP] and its binding RNA sequence [MS2 sequence]) (Schonberger et al., 2012). Target RNA is tagged with 6xMS2 and MCP and RNA binding ... [摘要]  RNA-蛋白质相互作用在各种真核生物过程中起重要作用。 RNA /蛋白质复合物在植物中亚细胞定位的分子成像对于理解这些相互作用至关重要。然而,到目前为止,尚未开发在活植物中形成RNA-蛋白质相互作用的方法。最近,我们开发了一种三分子荧光互补(TriFC)系统,用于在烟草叶中瞬时表达的RNA-蛋白质相互作用的体内可视化。在这种方法中,我们将传统的双分子荧光互补(BiFC)系统与MS2系统(噬菌体MS2外壳蛋白[MCP]及其结合RNA序列[MS2序列])(Schonberger等人,2012)相结合, 。目标RNA用6xMS2标记,MCP和RNA结合蛋白与YFP片段融合。编码这种融合RNA和蛋白质的DNA构建体用土壤杆菌悬浮液渗入烟草叶中。通过共焦显微镜观察体内的RNA-蛋白质相互作用
【背景】近来,多种类型的长非编码RNA(lncRNA)已经被鉴定并显示出在转录调节和染色质修饰中起重要作用(St Laurent等人,2015)。到目前为止,lncRNA介导的功能的大多数分子机制与RNA-蛋白质相互作用密切相关(St ...

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