| A Method to Convert mRNA into a Guide RNA (gRNA) Library without Requiring Previous Bioinformatics Knowledge of the Organism
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Author:
Date:
2017-05-20
[Abstract] While the diversity of species represents a diversity of special biological abilities, many of the genes that encode those special abilities in a variety of species are untouched, leaving an untapped gold mine of genetic information; however, despite current advances in genome bioinformatics, annotation of that genetic information is incomplete in most species, except for well-established model organisms, such as human, mouse, or yeast. A guide RNA (gRNA) library using the clustered regularly interspersed palindromic repeats (CRISPR)/Cas9 (CRISPR-associated protein 9) system can be used for the phenotypic screening of uncharacterized genes by forward genetics. The construction of a gRNA library usually requires an abundance of chemically synthesized oligos designed from annotated genes; ...
[摘要] 虽然物种的多样性代表着特殊的生物学能力的多样性，但许多编码这些特殊能力的基因却是不变的，留下了未开发的遗传信息金矿;然而，尽管基因组生物信息学方面取得了进展，但除了成熟的模型生物体，如人，小鼠或酵母，遗传信息的注释在大多数物种中是不完全的。使用聚簇常规散布的回文重复序列（CRISPR）/ Cas9（CRISPR相关蛋白9）系统的引导RNA（gRNA）文库可用于通过正向遗传学对非特异性基因的表型筛选。 gRNA文库的构建通常需要从注释基因设计的大量化学合成寡核苷酸;如果想在没有目标DNA序列的先验知识的情况下将mRNA转换成gRNA，那么主要的挑战就是发现原始邻近基序（PAM）侧翼的序列并切出20-bp片段。最近，我开发了基于分子生物学技术将mRNA转化为gRNA文库（Arakawa，2016）（图1）。我在这里描述了如何从mRNA构建gRNA文库的详细协议。
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图1.将mRNA转化为gRNA文库构建的方法（Sanjana等人，2014）。总结了该方法的方案。在步骤中详细描述了D-O的每个步骤。 ...
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| Identification of RNA-binding Proteins
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Author:
Date:
2016-09-05
[Abstract] This protocol describes the extraction of RNA-binding proteins (RBPs) from cell lysates. In order to pull down target RBPs, 5-bromo-UTP (BrUTP)-incorporated RNA probes are used, which are generated by in vitro transcription. The schematic diagram (Flowchart) with procedure is indicated (Figure1 and Figure 2).
Figure 1. Schematic diagram of procedure (A-H). Flow chart of experimental procedure is indicated at A-H.
图1.程序示意图（AH）。实验程序的流程图在AH指示。
图2.质粒的线性化 限制性酶。在与其克隆元件相邻的限制性位点切割质粒。
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| Mitochondrial RNA Transcript Analysis Assay of Arabidopsis Leaf Tissues
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Author:
Date:
2015-10-20
[Abstract] This qPCR-based assay provides an overview of the expression levels of all mitochondrial transcripts (mRNAs and rRNAs) as well as splicing efficiency in Arabidopsis. It was developed before RNAseq techniques were widely used (de Longevialle et al., 2007), but is nevertheless still useful as it is cheaper to run and the analysis is much easier and faster to perform if the aim is only to look at mitochondrial transcripts. For intron-containing mRNAs, the use of primer sets specifically amplifying spliced or unspliced forms allows the evaluation of the splicing efficiency.
[摘要] 这种基于qPCR的测定提供了所有线粒体转录物（mRNA和rRNA）的表达水平以及拟南芥中的剪接效率的概述。 它是在RNAseq技术被广泛使用之前开发的（de Longevialle等人，2007），但是仍然有用，因为它运行更便宜，并且分析更容易和更快地执行，如果目标 只是看看线粒体转录物。 对于含内含子的mRNA，使用特异性扩增剪接或未剪接形式的引物组允许评价剪接效率。
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