| Preparation of Sequencing RNA Libraries through Chemical Cross-linking Coupled to Affinity Purification (cCLAP) in Saccharomyces cerevisiae
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Author:
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）。 ...
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| A Ribosome Footprinting Protocol for Plants
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Author:
Date:
2016-11-05
[Abstract] Ribosome footprinting, or Ribo-seq, has revolutionized the studies of translation. It was originally developed for yeast and mammalian cells in culture (Ingolia et al., 2009). Herein, we describe a plant-optimized hands-on ribosome footprinting protocol derived from previously published procedures of polysome isolation (Ingolia et al., 2009; Mustroph et al., 2009) and ribosome footprinting (Ingolia et al., 2009; Ingolia et al., 2013). With this protocol, we have been able to successfully isolate and analyze high-quality ribosomal footprints from different stages of in vitro grown Arabidopsis thaliana plants (dark-grown seedlings [Merchante et al., 2015] and 13-day-old plantlets in plates and plants grown in liquid ...
[摘要] 核糖体足迹或Ribo-seq，彻底改变了翻译研究。它最初是为培养中的酵母和哺乳动物细胞开发的（Ingolia等人，2009）。本文中，我们描述了来自先前公开的多核糖体分离程序的植物优化的亲手核糖体印迹方案（Ingolia等人，2009; Mustroph等人，2009 ）和核糖体印迹（Ingolia等人，2009; Ingolia等人，2013）。使用该协议，我们能够成功地分离和分析来自体外生长的拟南芥植物（黑暗生长的幼苗）的不同阶段的高质量核糖体印迹[Merchante < ，以及在液体培养物中生长的板和植物中的13天龄小植物[未发表的结果]）。
[背景] 翻译在调节基因活性中的中心作用早已被公认，但是在响应于特定刺激的全基因组翻译定量变化的系统探索最近才变得技术上可行。最初为培养中的酵母和哺乳动物细胞开发的核糖体印迹技术（通常称为Ribo-seq）已经彻底改变了翻译调节和基因表达的研究，因为其允许确定核糖体在基因组 - ...
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| Detection and Visualization of Specific Gene Transcripts by in situ RT-PCR in Nematode-Infected Arabidopsis Root Tissue
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Author:
Date:
2015-09-20
[Abstract] This protocol describes an effective method of in situ RT-PCR that was developed to localize specific gene expression directly in thin cross-sections of nematode feeding sites induced by the cyst nematode Heterodera schachtii (H. schachtii) or the root-knot nematode Meloidogyne incognita (M. incognita) in Arabidopsis roots using DIG (Digoxigenin-11dUTP) labeling coupled with AP (alkaline phosphatase) and nitro-blue tetrazolium/5-bromo-4-chloro-3'-indolylphosphate-based detection. This method is applicable to any other Arabidopsis root tissue.
[摘要] 该方案描述了原位 RT-PCR的有效方法，其被开发用于直接在由胞囊线虫Heterodera schachtii诱导的线虫摄食位点的薄横截面中定位特异性基因表达。 在拟南芥根中（ H。schachtii ）或根结线虫 Meloidogyne incognita 使用与AP（碱性磷酸酶）和硝基蓝四唑/5-溴-4-氯-3'-吲哚磷酸盐基检测偶联的DIG（地高辛-11dUTP）标记。 该方法适用于任何其他拟南芥根组织。
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