文章基本信息

标题：Maxent-Stress Optimization of 3D Biomolecular Models
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作者：Michael Wegner ; Oskar Taubert ; Alexander Schug 等
期刊名称：LIPIcs : Leibniz International Proceedings in Informatics
电子版ISSN：1868-8969
出版年度：2017
卷号：87
页码：70:1-70:15
DOI：10.4230/LIPIcs.ESA.2017.70
出版社：Schloss Dagstuhl -- Leibniz-Zentrum fuer Informatik
摘要：Knowing a biomolecule's structure is inherently linked to and a prerequisite for any detailed understanding of its function. Significant effort has gone into developing technologies for structural characterization. These technologies do not directly provide 3D structures; instead they typically yield noisy and erroneous distance information between specific entities such as atoms or residues, which have to be translated into consistent 3D models. Here we present an approach for this translation process based on maxent-stress optimization. Our new approach extends the original graph drawing method for the new application's specifics by introducing additional constraints and confidence values as well as algorithmic components. Extensive experiments demonstrate that our approach infers structural models (i.e., sensible 3D coordinates for the molecule's atoms) that correspond well to the distance information, can handle noisy and error-prone data, and is considerably faster than established tools. Our results promise to allow domain scientists nearly-interactive structural modeling based on distance constraints.
关键词：Distance geometry; protein structure determination; 3D graph drawing; maxent-stress optimization