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arXiv 0901.3198q-bio.QM
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蛋白质序列比对的种子子集研究

On subset seeds for protein alignment

Mikhail A. Roytberg, Anna Gambin, Laurent Noé, Slawomir Lasota, Eugenia Furletova, Ewa Szczurek, Gregory Kucherov

摘要:

本文将文献[1]中提出的子集种子的概念应用于蛋白质序列的相似性搜索。研究的主要问题是设计有效的种子字母表,以构建具有最佳灵敏度/选择性权衡的种子。我们提出了几种不同的设计方法,并使用它们来构建几个字母。然后,我们对在这些字母表上构建的种子进行比较分析,并将它们与标准BLASTP播种方法[2],[3]以及[4]中提出的矢量种子家族进行比较。虽然子集种子的形式主义比BLASTP和载体种子中使用的累积原理表达性更低(但实现成本更低),但我们的种子在与常见BL 0 SUM 62矩阵兼容的蛋白质的伯努利模型上显示出类似或甚至更好的性能。最后,我们对几个主要的蛋白质比对数据库进行了大规模的种子基准测试。在这里,结果再次显示了我们的种子与BLASTP相比相当或更好的性能。

英文摘要:

We apply the concept of subset seeds proposed in [1] to similarity search in protein sequences. The main question studied is the design of efficient seed alphabets to construct seeds with optimal sensitivity/selectivity trade-offs. We propose several different design methods and use them to construct several alphabets. We then perform a comparative analysis of seeds built over those alphabets and compare them with the standard BLASTP seeding method [2], [3], as well as with the family of vector seeds proposed in [4]. While the formalism of subset seeds is less expressive (but less costly to implement) than the cumulative principle used in BLASTP and vector seeds, our seeds show a similar or even better performance than BLASTP on Bernoulli models of proteins compatible with the common BLOSUM62 matrix. Finally, we perform a large-scale benchmarking of our seeds against several main databases of protein alignments. Here again, the results show a comparable or better performance of our seeds vs. BLASTP.

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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