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MinElute PCR Purification Kit

MinElute PCR纯化试剂盒

公司名称: QIAGEN
产品编号: 28006
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Measuring Nucleosome Assembly Activity in vitro with the Nucleosome Assembly and Quantification (NAQ) Assay
Author:
Date:
2018-02-05
[Abstract]  Nucleosomes organize the eukaryotic genome into chromatin. In cells, nucleosome assembly relies on the activity of histone chaperones, proteins with high binding affinity to histones. At least a subset of histone chaperones promotes histone deposition in vivo. However, it has been challenging to characterize this activity, due to the lack of quantitative assays.

Here we developed a quantitative nucleosome assembly (NAQ) assay to measure the amount of nucleosome formation in vitro. This assay relies on a Micrococcal nuclease (MNase) digestion step that yields ...
[摘要]  核小体将真核生物基因组组装成染色质。在细胞中,核小体装配依赖于组蛋白分子伴侣的活性,对组蛋白具有高结合亲和力的蛋白。至少有一部分组蛋白伴侣促进组蛋白在体内的沉积。然而,由于缺乏定量分析,鉴定这种活性一直是一个挑战。

在这里,我们开发了一种定量核小体装配(NAQ)测定来测量体外核小体形成的量。该测定依赖于微球菌核酸酶(MNase)。随后在生物分析仪上运行,可以准确量化相对于加样对照的片段(长度和数量)。这使我们能够测量约150bp的DNA长度。该测定最终实现了不同组蛋白分子伴侣的核小体装配活性的表征,这是理解这些蛋白体内功能作用的一个步骤。

【背景】真核生物基因组被组织成核小体。核小体是由组蛋白八聚体核心组成的模块化和动态结构,由147bp的DNA包裹(Luger等人,1997)。核小体组装始于一个(H3-H4)2四聚体沉积到DNA上以形成四体体。随后的H2A-H2B二聚体结合形成六聚体,最后形成核小体。组蛋白高度带电,因为它们以生理盐浓度存在于组蛋白二聚体中。由于它们的作用,组蛋白需要分子伴侣将它们从细胞质穿梭到细胞核,然后辅助它们沉积到DNA上或从DNA上去除(Gurard-Levin等人,2014)。

组蛋白分子伴侣分组在结构上不相关的蛋白质家族中,所有这些蛋白质的特征在于对组蛋白的高度结合亲和力(Laskey等,1978)。通过这种方式,他们屏蔽了组蛋白的电荷,阻止了与DNA和其他细胞因子的非特异性相互作用(Elsässerand ...

Human, Bacterial and Fungal Amplicon Collection and Processing for Sequencing
Author:
Date:
2015-05-20
[Abstract]  Sequencing taxonomic marker genes is a powerful tool to interrogate the composition of microbial communities. For example, bacterial and fungal community composition can be evaluated in parallel using the 16S ribosomal RNA gene for bacteria or the internal transcribed spacer region in fungi. These are conserved regions that are universal to a taxonomic clade, yet have undergone some degree of evolution such that different lineages can be differentiated. Conserved regions are used for design of universal priming sites that allow amplification of the marker gene out of a mixed microbial ... [摘要]  测序分类标记基因是一个强有力的工具,以询问微生物群落的组成。 例如,可以使用细菌的16S核糖体RNA基因或真菌中的内部转录间隔区平行评估细菌和真菌群落组成。 这些是对分类学分支是通用的保守区,但已经经历了某种程度的进化,使得不同谱系可以分化。 保守区用于设计允许从混合微生物群落扩增标记基因的通用引发位点。 在这里,我们描述我们的标准操作程序收集和序列16S rRNA和ITS1扩增子从人类皮肤。 我们使用16S rRNA V1-V3区域的皮肤样本,因为它有更大的权力分类皮肤中的常见葡萄球菌。 该方案适用于扩增子的454焦磷酸测序。

Plant Sequence Capture Optimised for Illumina Sequencing
Author:
Date:
2014-07-05
[Abstract]  Plant Sequence Capture is used for targeted resequencing of whole exomes (all exons of a genome) of complex genomes e.g. barley and its relatives (Mascher et al., 2013). Sequencing and computing costs are significantly reduced since only the greatly enriched and gene-coding part of the barley genome is targeted, that corresponds to only 1-2% of the entire genome. Thus, applications such as genetic diversity studies and the isolation of single genes (“cloning-by-sequencing”) are greatly facilitated. Here, a protocol is provided describing the construction of shotgun DNA ... [摘要]  植物序列捕获用于复杂基因组(例如大麦及其亲属)的整个外显子(基因组的所有外显子)的靶向重测序(Mascher等人,2013)。测序和计算成本显着降低,因为只有大麦基因组的大量富集和基因编码部分被靶向,其仅对应于整个基因组的1-2%。因此,大大促进了诸如遗传多样性研究和单个基因的分离("通过测序克隆")的应用。这里,提供了描述来自基因组大麦DNA的Shotgun DNA文库的构建以在Illumina HiSeq/MiSeq系统上测序的方案。鸟枪DNA测序文库与包含大麦整个外显子组的寡核苷酸池(Exome Library)杂交。外显子组库作为包含生物素化探针(Roche/NimbleGen)的液体阵列提供。随后,使用链霉亲和素包被的磁珠对与Exome文库杂交的基因组鸟枪DNA片段进行亲和纯化。捕获的文库被PCR扩增和测序,使用高通量短读序列合成

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