Kmacs: the k-mismatch average common substring approach to alignment-free sequence comparison.
Kmacs: the k-mismatch average common substring approach to alignment-free sequence comparison.
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DOI:
10.1093/bioinformatics/btu331
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发表时间:
2014-07-15
期刊:
影响因子:
--
通讯作者:
Morgenstern B
中科院分区:
文献类型:
--
作者:
Leimeister CA;Morgenstern B
Motivation: Alignment-based methods for sequence analysis have various limitations if large datasets are to be analysed. Therefore, alignment-free approaches have become popular in recent years. One of the best known alignment-free methods is the average common substring approach that defines a distance measure on sequences based on the average length of longest common words between them. Herein, we generalize this approach by considering longest common substrings with k mismatches. We present a greedy heuristic to approximate the length of such k-mismatch substrings, and we describe kmacs, an efficient implementation of this idea based on generalized enhanced suffix arrays. Results: To evaluate the performance of our approach, we applied it to phylogeny reconstruction using a large number of DNA and protein sequence sets. In most cases, phylogenetic trees calculated with kmacs were more accurate than trees produced with established alignment-free methods that are based on exact word matches. Especially on protein sequences, our method seems to be superior. On simulated protein families, kmacs even outperformed a classical approach to phylogeny reconstruction using multiple alignment and maximum likelihood. Availability and implementation: kmacs is implemented in C++, and the source code is freely available at http://kmacs.gobics.de/ Contact: chris.leimeister@stud.uni-goettingen.de Supplementary information: Supplementary data are available at Bioinformatics online.
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影响因子:
3
作者:
Hauser M;Mayer CE;Söding J
通讯作者:
Söding J
影响因子:
5.8
作者:
Stoye, J;Evers, D;Meyer, F
通讯作者:
Meyer, F
影响因子:
11
作者:
Newton, Ryan J.;Griffin, Laura E.;Moran, Mary Ann
通讯作者:
Moran, Mary Ann
DOI:
10.1093/bioinformatics/btu177
发表时间:
2014-07-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Leimeister CA;Boden M;Horwege S;Lindner S;Morgenstern B
通讯作者:
Morgenstern B
影响因子:
3
作者:
Haubold B;Pierstorff N;Möller F;Wiehe T
通讯作者:
Wiehe T