Compound poisson approximation of the number of occurrences of a position frequency matrix (PFM) on both strands.
Compound poisson approximation of the number of occurrences of a position frequency matrix (PFM) on both strands.
复制标题
两条链上位置频率矩阵 (PFM) 出现次数的复合泊松近似。
DOI:
10.1089/cmb.2007.0084
复制
发表时间:
2008-07
影响因子:
1.7
通讯作者:
Vingron, Martin
中科院分区:
文献类型:
--
作者:
Pape, Utz J.;Rahmann, Sven;Sun, Fengzhu;Vingron, Martin
关键词:
Transcription factors play a key role in gene regulation by interacting with specific binding sites or motifs. Therefore, enrichment of binding motifs is important for genome annotation and efficient computation of the statistical significance, the p-value, of the enrichment of motifs is crucial. We propose an efficient approximation to compute the significance. Due to the incorporation of both strands of the DNA molecules and explicit modeling of dependencies between overlapping hits, we achieve accurate results for any DNA motif based on its Position Frequency Matrix (PFM) representation. The accuracy of the p-value approximation is shown by comparison with the simulated count distribution. Furthermore, we compare the approach with a binomial approximation, (compound) Poisson approximation, and a normal approximation. In general, our approach outperforms these approximations or is equally good but significantly faster. An implementation of our approach is available at http://mosta.molgen.mpg.de.
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DOI:
10.1080/07391102.1986.10507643
发表时间:
1986-08-01
影响因子:
4.4
作者:
BRENDEL, V;BECKMANN, JS;TRIFONOV, EN
通讯作者:
TRIFONOV, EN
影响因子:
1.1
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GUIBAS, LJ;ODLYZKO, AM
通讯作者:
ODLYZKO, AM
影响因子:
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作者:
Hertzberg, L;Zuk, O;Domany, E
通讯作者:
Domany, E
影响因子:
1.7
作者:
Keich, U
通讯作者:
Keich, U
影响因子:
1.7
作者:
Reinert, G;Schbath, S;Waterman, MS
通讯作者:
Waterman, MS