Nucleic Acids Res:Tn-Seq数据统计方法新进展

2017-03-25 MedSci MedSci原创

近期,Nucleic Acids Res中一篇文章指出,Tn-Seq数据统计方法有了新进展。Tn-Seq是一种通过对复杂的随机转座子插入库的构造,来探索基因功能的实验方法;通过使用新一代的测序技术,对每一个突变的度进行量化。识别基因的相互作用是Tn-Seq的一项新兴应用,这包含了在不同遗传背景下进行Tn突变库的比较(例如野生型菌株与敲除型的比较)。为了识别基因间的相互作用,提出几种Tn-Seq数据

近期,Nucleic Acids Res中一篇文章指出,Tn-Seq数据统计方法有了新进展。

Tn-Seq是一种通过对复杂的随机转座子插入库的构造,来探索基因功能的实验方法;通过使用新一代的测序技术,对每一个突变的度进行量化。识别基因的相互作用是Tn-Seq的一项新兴应用,这包含了在不同遗传背景下进行Tn突变库的比较(例如野生型菌株与敲除型的比较)。

为了识别基因间的相互作用,提出几种Tn-Seq数据的分析方法。包括评估相对健康比率和广义线性模型拟合。然而,这些方法都具有局限性,面临着需要改进的局面。

该文章通过对大量的变化的统计数据进行了量化,提出能够识别基因相互作用的一种新的方法-分层叶贝斯方法。分析包括了对数据库中插入项进行四通比较,来识别不同遗传背景下,转座子突变体对细菌影响的不同。

该方法被应用于Tn-Seq库,被认为是感染期间最佳的选择。选择同基因结核分枝杆菌菌株,且三种功能未知基因缺乏,构建了一个Tn-Seq库。通过在老鼠身上对该库进行分析,能够针对每一个目标基因,区分几种不同类型的基因相互作用。并能够阐明其在感染期间功能及起到的作用。

原始出处:

DeJesus MA,Nambi S,Smith CM,et al.Statistical analysis of genetic interactions in Tn-Seq data.Nucleic Acids Res. 2017 Feb 22. doi: 10.1093/nar/gkx128.

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    2017-05-14 wodejia-dayu
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    2017-12-21 xlxchina
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