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Unstructural biology of the dengue virus proteins

机译:登革热病毒蛋白的非结构生物学

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In this study, we used a wide spectrum of bioinformatics techniques to evaluate the extent of intrinsic disorder in the complete proteomes of genotypes of four human dengue virus (DENV), to analyze the peculiarities of disorder distribution within individual DENV proteins, and to establish potential roles for the structural disorder with respect to their functions. We show that several proteins (ER, E, 1, 2A and 4A) are predicted to be mostly ordered, whereas four proteins (C, 2k, NS3 and NS5) are expected to have high disorder levels. The profiles of disorder propensities are similar across the four genotypes, except for the NS5 protein. Cleavage sites are depleted in polymorphic sites, and have a high propensity for disorder, especially relative to neighboring residues. Disordered regions are highly polymorphic in type 1 DENV but have a relatively low number of polymorphic sites in the type 4 virus. There is a high density of polymorphisms in proteins 2A and 4A, which are depleted in disorder. Thus, a high density of polymorphism is not unique to disordered regions. Analysis of disorder/function association showed that the predominant function of the disordered regions in the DENV proteins is protein-protein interaction and binding of nucleic acids, metals and other small molecules. These regions are also associated with phosphorylation, which may regulate their function.
机译:在这项研究中,我们使用了广泛的生物信息学技术来评估四种人类登革热病毒(DENV)基因型的完整蛋白质组中固有疾病的程度,以分析单个DENV蛋白中疾病分布的特殊性,并建立潜力结构性障碍在功能上的作用。我们表明,几种蛋白质(ER,E,1、2A和4A)被预测为最有序的,而四种蛋白质(C,2k,NS3和NS5)则有望具有较高的无序水平。除了NS5蛋白外,四种基因型的疾病倾向特征相似。切割位点在多态位点中被耗尽,并且具有高度的无序倾向,尤其是相对于邻近残基而言。在1型DENV中无序区域具有高度多态性,但在4型病毒中具有相对较少的多态性位点。蛋白质2A和4A的多态性密度很高,这些蛋白质在无序状态中耗竭。因此,高密度的多态性不是无序区域所独有的。对失调/功能关联的分析表明,DENV蛋白质中失调区域的主要功能是蛋白质-蛋白质相互作用以及核酸,金属和其他小分子的结合。这些区域也与磷酸化相关,其可以调节其功能。

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