| Markerless Gene Editing in the Hyperthermophilic Archaeon Thermococcus kodakarensis
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Author:
Date:
2017-11-20
[Abstract] The advent of single cell genomics and the continued use of metagenomic profiling in diverse environments has exponentially increased the known diversity of life. The recovered and assembled genomes predict physiology, consortium interactions and gene function, but experimental validation of metabolisms and molecular pathways requires more directed approaches. Gene function–and the correlation between phenotype and genotype is most obviously studied with genetics, and it is therefore critical to develop techniques permitting rapid and facile strain construction. Many new and candidate archaeal lineages have recently been discovered, but experimental, genetic access to archaeal genomes is currently limited to a few model organisms. The results obtained from manipulating the genomes of ...
[摘要] 单细胞基因组学的出现以及在不同环境中宏基因组分析的持续使用已经成倍地增加了已知的生命多样性。恢复和组装的基因组预测生理，财团相互作用和基因功能，但代谢和分子途径的实验验证需要更直接的方法。基因功能 - 表型和基因型之间的相关性用遗传学得到最明显的研究，因此开发允许快速和容易地构建应变的技术是至关重要的。最近已经发现了许多新的和候选的古细菌谱系，但是对古细菌基因组的实验性，遗传途径目前仅限于一些模式生物。操纵这些基因可获得的生物的基因组所获得的结果已经对我们对古菌生理和信息处理系统的理解产生了深远的影响，这些持续的研究也有助于解决生命树的系统发育重建。超嗜热，浮游，海洋异养古细菌Thermococcus kodakarensis已经成为理想的遗传系统，其具有一系列可用于增加或减少编码活性的技术或修饰基因在体内的表达 。我们在这里概述一些技术，可以快速，无标记地删除单个，或者重复删除几个连续的从 T的序列。 kodakarensis 基因组。我们的程序包括构建转化所必需的质粒DNA的细节，所述质粒DNA通过同源重组指导整合到基因组中，鉴定已经整合了质粒序列的菌株（称为中间菌株）和确认质粒切除，导致最终菌株中的目标基因。可以使用几乎相同的程序来修饰而不是删除基因组基因座。
【背景】古细菌常常在看起来荒凉和迅速变化的环境中繁衍生息。古菌基因组的分析揭示了大量的代谢策略，预测了复杂和高度相互依赖的基因表达的调控网络，并揭示了许多基因，其蛋白质和日益稳定的RNA产物缺乏确定的功能。通过遗传操作挑战现有的和定义新的途径的能力已经辅助了古细菌生理学和信息处理系统的去卷积，并且最近开放了古细菌物种到合成和系统级的方法来定义细胞内和细胞间网络。 ...
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| Extraction of Total Proteins from Rice Plant
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Author:
Date:
2014-11-05
[Abstract] This protocol provides an efficient method for preparation of high-quality proteins from rice leaves and grains. The method involves phenol extraction to separate proteins from the non-protein components such as polysaccharides, lipids and phenolic compounds that are commonly enriched in plant tissues. Following isolation, proteins are precipitated with ammonium acetate/methanol and then solubilized for proteomic analysis. As the protocol is simple, universal, and most importantly compatible with silver staining, it has been applied to our routine protein extraction from rice and many other plant tissues and it even works fine in animal tissues for the requirement of electrophoretic separation.
[摘要] 这个协议提供了一种从稻叶和谷物制备高质量蛋白质的有效方法。 该方法包括酚提取以从通常富含植物组织的非蛋白质组分如多糖，脂质和酚类化合物中分离蛋白质。 分离后，用乙酸铵/甲醇沉淀蛋白质，然后溶解用于蛋白质组分析。 由于协议简单，通用，最重要的是与银染色兼容，它已经应用于我们从水稻和许多其他植物组织的常规蛋白质提取，甚至在动物组织中对于电泳分离的要求很好。
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