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首页> 外文期刊>Journal of Bioinformatics and Computational Biology >MULTIRESOLUTION ANALYSIS UNCOVERS HIDDEN CONSERVATION OF PROPERTIES IN STRUCTURALLY AND FUNCTIONALLY SIMILAR PROTEINS
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MULTIRESOLUTION ANALYSIS UNCOVERS HIDDEN CONSERVATION OF PROPERTIES IN STRUCTURALLY AND FUNCTIONALLY SIMILAR PROTEINS

机译:多分辨分析无法隐藏结构和功能相似蛋白的性质守恒

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摘要

Physicochemcial properties of amino acids are important factors in determining protein structure and function. Most approaches make use of averaged properties over entire domains or even proteins to analyze their structure or function. This level of coarseness tends to hide the richness of the variability in the different properties across functional domains. This paper studies the conservation of physicochemical properties in a functionally similar family of proteins using a novel wavelet-based technique known as multiresolution analysis. Such an analysis can help uncover characteristics that can otherwise remain hidden. We have studied the protein kinase family of sequences and our findings are as follows: (a) a number of different properties are conserved over the functional catalytic domain irrespective of the sequence identities; (b) conservation of properties can be observed at different frequency levels and they agree well with the known structural/functional properties of the subdomains for the protein kinase family; (c) structural differences between the different kinase family members are reflected in the waveforms; and (d) functionally important mutations show distortions in the waveforms of conserved properties. The potential usefulness of the above findings in identifying functionally similar sequences in the twilight and midnight zones is demonstrated through a simple prediction model for the protein kinase family which achieved a recall of 93.7% and a precision of 96.75% in cross-validation tests.
机译:氨基酸的物理化学性质是决定蛋白质结构和功能的重要因素。大多数方法利用整个域甚至蛋白质的平均特性来分析其结构或功能。这种粗糙程度倾向于在功能域中隐藏不同属性中变异性的丰富性。本文使用一种称为多分辨率分析的基于小波的新技术,研究功能相似的蛋白质家族中的理化性质的保守性。这样的分析可以帮助发现原本可以隐藏的特征。我们已经研究了蛋白激酶家族的序列,我们的发现如下:(a)在功能催化结构域上,许多保守的特性不考虑序列同一性; (b)可以在不同的频率水平观察到特性的保守性,它们与蛋白激酶家族亚结构域的已知结构/功能特性十分吻合; (c)在波形中反映了不同激酶家族成员之间的结构差异; (d)具有重要功能的突变显示出保守特性的波形失真。通过简单的蛋白质激酶家族预测模型,可以证明上述发现在识别暮光区和午夜区的功能相似序列方面的潜在有用性,该模型在交叉验证测试中的召回率为93.7%,精确度为96.75%。

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