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TMW-20 Transilluminator

Company: UVP
Catalog#: TMW-20
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Ultradeep Pyrosequencing of Hepatitis C Virus to Define Evolutionary Phenotypes
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2017-05-20
[Abstract]  Analysis of hypervariable regions (HVR) using pyrosequencing techniques is hampered by the ability of error correction algorithms to account for the heterogeneity of the variants present. Analysis of between-sample fluctuations to virome sub-populations, and detection of low frequency variants, are unreliable through the application of arbitrary frequency cut offs. Cumulatively this leads to an underestimation of genetic diversity. In the following technique we describe the analysis of Hepatitis C virus (HCV) HVR1 which includes the E1/E2 glycoprotein gene junction. This procedure describes the evolution of HCV in a treatment naïve environment, from 10 samples collected over 10 years, using ultradeep pyrosequencing (UDPS) performed on the Roche GS FLX titanium platform (Palmer et al. ... [摘要]  使用焦磷酸测序技术的高变区(HVR)分析受到纠错算法解释存在的变异异质性的能力的阻碍。通过应用任意频率切断,对样本间波动与色情子群体的分析以及低频变体的检测是不可靠的。累积地导致遗传多样性的低估。在以下技术中,我们描述了包含E1 / E2糖蛋白基因连接的丙型肝炎病毒(HCV)HVR1的分析。该程序描述了HCV在治疗初始环境中的演变,从10年来收集的10个样品中,使用在Roche GS FLX钛平台上进行的超深度焦磷酸测序(UDPS)(2014年,Palmer等人) 。使用血清样品的初步克隆分析来通知允许达到更大序列深度的下游误差校正算法。已经针对HCV基因型1,2,3和4测试了该区域的PCR扩增。

背景 衍生自病毒扩增子的UDPS数据集的分析经常依赖于未针对扩增子分析进行优化的软件工具,假设随机并入测序突变,并且集中在找到真实序列而不是假变异体。存在于RNA病毒基因组中的高变区存在这些困难。许多利用UDPS的研究通过对数据应用任意的频率切断来寻求解决这些问题,从而导致小的变体的丢失。在这里,暂时匹配的克隆数据集以及旨在克服所概述的问题的纠错方法,有助于保留有价值的序列信息。

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