| DNA-free Genome Editing of Chlamydomonas reinhardtii Using CRISPR and Subsequent Mutant Analysis
|
|
Author:
Date:
2017-06-05
[Abstract] We successfully introduced targeted knock-out of gene of interest in Chlamydomonas reinhardtii by using DNA-free CRISPR. In this protocol, the detailed procedures of an entire workflow cover from the initial target selection of CRISPR to the mutant analysis using next generation sequencing (NGS) technology. Furthermore, we introduce a web-based set of tools, named CRISPR RGEN tools (http://www.rgenome.net/), which provides all required tools from CRISPR target design to NGS data analysis.
[摘要] 我们通过使用无DNA的CRISPR成功地引入了目标克隆在赖氨酸衣藻中的目标基因敲除。在该协议中，整个工作流程的详细过程涵盖从初始目标选择CRISPR到使用下一代测序（NGS）技术的突变体分析。此外，我们介绍一种基于Web的工具集，名为CRISPR RGEN工具（ http：// www.rgenome.net/ ），其中提供了CRISPR目标设计到NGS数据分析的所有必需工具。
背景 我们最近报道（Baek等人，2016），使用预先组装的Cas9蛋白质指导RNA核糖核蛋白，模型绿色微藻（Chlamydomonas ...
|
|
|
| Post-crystallization Improvement of RNA Crystals by Synergistic Ion Exchange and Dehydration
|
|
Author:
Date:
2015-09-05
[Abstract] Compared to the recent dramatic growth in the numbers of genome-wide and functional studies of complex non-coding RNAs, mechanistic and structural analyses have lagged behind. A major technical bottleneck in the structural determination of large RNAs and their complexes is preparation of diffracting crystals. Empirically, a vast majority of such RNA crystals fail to diffract X-rays to usable resolution (~4 Å) due to their inherent disorder and non-specific packing within the crystals. Here, we present a protocol that combines post-crystallization cation replacement and dehydration that ...
[摘要] 与最近在复杂的非编码RNA的基因组范围和功能研究的数量的显着增长相比，机械和结构分析已经落后。在大RNA及其复合物的结构确定中的主要技术瓶颈是衍射晶体的制备。经验上，由于其固有的无序和在晶体内的非特异性堆积，绝大多数这样的RNA晶体不能将X射线衍射到可用的分辨率（〜4）。在这里，我们提出一个协议，结合后结晶阳离子替代和脱水，大大改善晶体的大基因调节mRNA-tRNA复杂的衍射质量。该程序不仅将X射线数据的分辨率极限从8.5扩展到3.2，而且还显着提高了数据的质量，实现了重新定相和结构确定。因为它利用了反离子和溶剂化在RNA结构中的一般重要性，这个程序可能证明在其他大型非编码RNA的晶体学分析中广泛有用。
|
|
|