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Proteinase K (Fungal)

蛋白酶K(真菌)

Company: Thermo Fisher Scientific
Catalog#: 25530015
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Tethered Chromosome Conformation Capture Sequencing in Triticeae: A Valuable Tool for Genome Assembly
Author:
Date:
2018-08-05
[Abstract]  Chromosome conformation capture sequencing (Hi-C) is a powerful method to comprehensively interrogate the three-dimensional positioning of chromatin in the nucleus. The development of Hi-C can be traced back to successive increases in the resolution and throughput of chromosome conformation capture (3C) (Dekker et al., 2002). The basic workflow of 3C consists of (i) fixation of intact chromatin, usually by formaldehyde, (ii) cutting the fixed chromatin with a restriction enzyme, (iii) religation of sticky ends under diluted conditions to favor ligations between cross-linked fragments or those between random fragments and (iv) quantifying the number of ligations events between pairs of genomic loci (de Wit and de Laat, 2012). In the original 3C protocol, ligation frequency was ... [摘要]  染色体构象捕获测序(Hi-C)是一种全面询问细胞核中染色质三维定位的有效方法。 Hi-C的发展可以追溯到染色体构象捕获的分辨率和通量的连续增加(3C)(Dekker et al。,2002)。 3C的基本工作流程包括(i)通常用甲醛固定完整的染色质,(ii)用限制酶切割固定的染色质,(iii)在稀释条件下重新连接粘性末端,以促进交联片段之间的连接或随机片段之间的那些和(iv)量化基因组基因座对之间的连接事件的数量(de Wit和de Laat,2012)。在最初的3C方案中,通过半定量PCR扩增对应于少量基因组位点(“一对一”)的选定连接接头来测量连接频率(Dekker et al。,2002 )。然后,染色体构象捕获芯片(4C)和染色体构象捕获碳复制(5C)技术扩展3C以分别以“一对多”或“多对多”方式计算结扎事件。 Hi-C(Lieberman-Aiden et al。,2009)最终将3C与下一代测序相结合(Metzker,2010)。此处,在再连接之前,用生物素标记的核苷酸类似物填充粘性末端以在后续步骤中富集具有连接连接的片段。然后对Hi-C文库进行高通量测序,并将得到的读数映射到参考基因组,允许以“多对多”方式确定接触概率,其分辨率仅受限制性位点的分布限制和阅读深度。 Hi-C的首次应用是阐明人类基因组中的全球染色质折叠原理(Lieberman-Aiden et ...

Mapping RNA Sequences that Contact Viral Capsid Proteins in Virions
Author:
Date:
2017-07-20
[Abstract]  We have adapted the methodology of CLIP-seq (Crosslinking-Immunoprecipitation and DNA Sequencing) to map the segments of encapsidated RNAs that contact the protein shells of virions. Results from the protocol report on the RNA sequences that contact the viral capsid. [摘要]  我们已经调整了CLIP-seq(交联 - 免疫沉淀和DNA测序)的方法来绘制与病毒粒子的蛋白质壳接触的壳化RNA片段。 关于接触病毒衣壳的RNA序列的方案报告的结果。
【背景】正义RNA病毒包括所有生命形式的病原体。具有二十面体形状的病毒具有病毒外壳蛋白在RNA基因组周围形成保护壳(Stockley等人,2013)。在噬菌体MS2和植物感染的Brome花叶病毒(BMV)中,外壳蛋白优先接触特异性RNA序列(Ni等人,2013; Hoover等人。 ,2016; Rolfsson等人,2016)。这些接触可以调节感染期间RNA释放的时间,病毒基因表达和病毒RNA复制(Hoover等人,2016)。鉴定衣壳RNA相互作用可以提供对病毒感染的规定的见解,并提供抑制病毒感染的手段。考虑到这一点,我们已经开发了一种方法,使用UV交联,RNA断裂,外壳蛋白的选择性沉淀和由RNA片段制备的cDNA的下一代测序来鉴定纯化的病毒体中的衣壳RNA接触。以下协议是针对BMV病毒粒子开发的。

ACE-score-based Analysis of Temporal miRNA Targetomes During Human Cytomegalovirus Infection Using AGO-CLIP-seq
Author:
Date:
2016-04-20
[Abstract]  Although temporal regulation of gene expression during the course of infection is known to be critical for determining the outcome of host-virus interactions, systematic temporal analysis of the miRNA targetomes during productive viral infection has been technically challenging due to the large range of miRNA-mRNA cross-talks at the host-virus interface. High-confidence quantifying models of the suppression efficacy in targeting sites by integrating bioinformatics with Argonaute-crosslinking and immunoprecipitation followed by high-throughput sequencing (AGO-CLIP-seq) (Chi et al., 2009) data have been poorly developed. To accurately identify miRNA target sites and calculate the targeting efficacy of miRNA-target interactions, we developed a new bioinformatic quantitation method, ... [摘要]  尽管已知在感染过程中基因表达的时间调节对于确定宿主 - 病毒相互作用的结果是至关重要的,但是在生产性病毒感染期间对miRNA targetomes的系统时间分析在技术上是具有挑战性的,因为大范围的miRNA- mRNA在主机 - 病毒接口交叉对话。数据通过将生物信息学与Argonaute-交联和免疫沉淀接着高通量测序(AGO-CLIP-seq)数据(Chi等人,2009)数据结合,已经不发达。为了准确地鉴定miRNA靶位点并计算miRNA-靶相互作用的靶向效果,我们开发了新的生物信息学定量方法,即AGO-CLIP-seq富集(ACE) - 评分算法(Kim等, 2015)。在我们的AGO-CLIP-seq分析中包括未感染的对照可以显着提高病毒或人miRNA的真实靶位点识别的准确性,并且在我们的ACE评分方法中提取生产性人巨细胞病毒(HCMV)感染期间的生理学显着变化。因此,我们建议我们新的基于ACE评分的方法可以应用于各种miRNA targetome研究,这将在其他类型的时间背景下进行,如发展阶段,细胞因子或病原体的免疫刺激和其他病毒。

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