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arXiv 1104.1234q-bio.GNstat.ML
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阴性例辅助转录因子结合位点检索

Negative Example Aided Transcription Factor Binding Site Search

Chih Lee, Chun-Hsi Huang

摘要:

转录因子结合位点识别的计算方法在过去的十年中得到了积极的研究。负例长期以来一直被用于从头发现基序,并已被证明是有用的转录因子结合位点搜索。然而,对阴性例子在结合位点搜索中的作用的理解仍然非常有限。我们提出了2-质心和最佳鉴别向量方法,考虑到反例。对E.大肠杆菌转录因子的实验结果表明,所提出的方法受益于负例,优于质心和位置特异性评分矩阵方法。我们进一步表明,我们提出的方法比最先进的方法更好地执行。我们的其他比较方法的背景下,所提出的方法的特点,并表明,再加上基序亚型识别,所提出的方法可以有效地应用于广泛的转录因子。最后,我们认为,所提出的方法是非常适合真核转录因子以及。软件工具可在http://biogrid.engr.uconn.edu/tfbs_search/上获得。

英文摘要:

Computational approaches to transcription factor binding site identification have been actively researched for the past decade. Negative examples have long been utilized in de novo motif discovery and have been shown useful in transcription factor binding site search as well. However, understanding of the roles of negative examples in binding site search is still very limited. We propose the 2-centroid and optimal discriminating vector methods, taking into account negative examples. Cross-validation results on E. coli transcription factors show that the proposed methods benefit from negative examples, outperforming the centroid and position-specific scoring matrix methods. We further show that our proposed methods perform better than a state-of-the-art method. We characterize the proposed methods in the context of the other compared methods and show that, coupled with motif subtype identification, the proposed methods can be effectively applied to a wide range of transcription factors. Finally, we argue that the proposed methods are well-suited for eukaryotic transcription factors as well. Software tools are available at: http://biogrid.engr.uconn.edu/tfbs_search/.

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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