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NEBufferTM 3

NEBuffer 3

公司名称: New England Biolabs
产品编号: B7003S
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Host-regulated Hepatitis B Virus Capsid Assembly in a Mammalian Cell-free System
Author:
Date:
2018-04-20
[Abstract]  The hepatitis B virus (HBV) is an important global human pathogen and represents a major cause of hepatitis, liver cirrhosis and liver cancer. The HBV capsid is composed of multiple copies of a single viral protein, the capsid or core protein (HBc), plays multiple roles in the viral life cycle, and has emerged recently as a major target for developing antiviral therapies against HBV infection. Although several systems have been developed to study HBV capsid assembly, including heterologous overexpression systems like bacteria and insect cells, in vitro assembly using purified ... [摘要]  乙型肝炎病毒(HBV)是一种重要的全球人类病原体,并且是肝炎,肝硬化和肝癌的主要原因。 HBV衣壳由单个病毒蛋白的多个拷贝组成,衣壳或核心蛋白(HBc)在病毒生命周期中起着多重作用,并且最近已经成为开发抗HBV病毒疗法的主要靶标。尽管已经开发了几种用于研究HBV衣壳组装的系统,包括异源过表达系统如细菌和昆虫细胞,使用纯化蛋白质和哺乳动物细胞培养系统进行体外组装,但对非生理浓度HBc和盐以及难以操纵装配的宿主调节物在生理相关条件下的衣壳装配的详细研究方面存在主要限制。我们最近开发了基于兔网织红细胞裂解物(RRL)的哺乳动物无细胞系统,其中HBc以生理浓度表达并在近生理条件下组装成衣壳。该系统已经揭示了HBc装配要求,这是以前装配系统所不能预料的。此外,该系统中的衣壳组装受可容易操作的内源宿主因子调控。在这里,我们提供了这种无细胞衣壳装配系统的详细协议,包括如何操纵调节装配的宿主因子的说明。

【背景】乙型肝炎病毒(HBV)是一种重要的全球人类病原体,其长期感染全世界数以亿计的人并且代表病毒性肝炎,肝硬化和肝癌的主要原因(Seeger等人, 2013; Trepo et。,2014)。 HBV通过逆转录RNA中间体(所谓的前基因组RNA(pgRNA))在核衣壳内(NC)复制其基因组DNA(一种宽松的环状部分双链DNA(RC ...

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., ... [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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