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arXiv 1104.2995q-bio.QM
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蛋白质结构距离矩阵优化比对的算法工程

Algorithm engineering for optimal alignment of protein structure distance matrices

Inken Wohlers, Rumen Andonov, Gunnar W. Klau

摘要:

蛋白质结构比对是计算生物学中的一个重要问题。在本文中,我们提出了第一个成功的证明最佳的蛋白质间残基距离矩阵的成对比对,使用流行的达利评分函数。我们正式引入结构对齐问题,这使我们能够在一个统一的框架中表达各种特殊情况下在以前的工作中使用的评分功能。此外,我们提出了第一个数学模型计算的基础上密集的残基间距离矩阵的最佳结构比对。因此,我们将该问题转化为一个特殊的图问题,并给出了一个紧整数线性规划模型。然后,我们提出了算法工程技术来处理现实生活中的距离矩阵对齐问题的巨大的整数线性规划。应用这些技术,我们可以计算证明最佳的达利对齐的第一次。

英文摘要:

Protein structural alignment is an important problem in computational biology. In this paper, we present first successes on provably optimal pairwise alignment of protein inter-residue distance matrices, using the popular Dali scoring function. We introduce the structural alignment problem formally, which enables us to express a variety of scoring functions used in previous work as special cases in a unified framework. Further, we propose the first mathematical model for computing optimal structural alignments based on dense inter-residue distance matrices. We therefore reformulate the problem as a special graph problem and give a tight integer linear programming model. We then present algorithm engineering techniques to handle the huge integer linear programs of real-life distance matrix alignment problems. Applying these techniques, we can compute provably optimal Dali alignments for the very first time.

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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