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arXiv 0907.4115q-bio.GNq-bio.MN
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人类MicroRNA -转录因子前馈调节通路的全基因组研究

Genome-Wide Survey of MicroRNA - Transcription Factor Feed-Forward Regulatory Circuits in Human

Angela Re, Davide Cora', Daniela Taverna, Michele Caselle

摘要:

在这项工作中,我们描述了一个计算框架的全基因组识别和表征的混合转录/转录后调节电路在人类。我们特别关注前馈环(FFL),其中主转录因子调节microRNA,并与它一起调节一组联合靶蛋白编码基因。用两步程序组装电路。我们首先通过寻找人和小鼠启动子中保守的过度表达基序和3 '-UTR,分别构建了人调控网络的转录和转录后组分。然后,我们将两个子网络结合起来,寻找混合前馈调节相互作用,共找到638个推定的(合并的)FFL。为了研究它们的生物学相关性,我们使用三个选择标准过滤这些回路:(I)FFL的联合靶标之间的基因本体论富集,(II)从外部数据库提取的FFL的调节相互作用的独立计算证据,以及(III)FFL在癌症中的相关性。大多数选择的FFL似乎参与生物体发育和分化的各个方面。最后,我们将详细讨论几个最有趣的案例。

英文摘要:

In this work, we describe a computational framework for the genome-wide identification and characterization of mixed transcriptional/post-transcriptional regulatory circuits in humans. We concentrated in particular on feed-forward loops (FFL), in which a master transcription factor regulates a microRNA, and together with it, a set of joint target protein coding genes. The circuits were assembled with a two step procedure. We first constructed separately the transcriptional and post-transcriptional components of the human regulatory network by looking for conserved over-represented motifs in human and mouse promoters, and 3'-UTRs. Then, we combined the two subnetworks looking for mixed feed-forward regulatory interactions, finding a total of 638 putative (merged) FFLs. In order to investigate their biological relevance, we filtered these circuits using three selection criteria: (I) GeneOntology enrichment among the joint targets of the FFL, (II) independent computational evidence for the regulatory interactions of the FFL, extracted from external databases, and (III) relevance of the FFL in cancer. Most of the selected FFLs seem to be involved in various aspects of organism development and differentiation. We finally discuss a few of the most interesting cases in detail.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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