An Affinity Propagation-Based DNA Motif Discovery Algorithm.
The planted (l, d) motif search (PMS) is one of the fundamental problems in bioinformatics, which plays an important role in locating transcription factor binding sites (TFBSs) in DNA sequences. Nowadays, identifying weak motifs and reducing the effect of local optimum are still important but challenging tasks for motif discovery. To solve the tasks, we propose a new algorithm, APMotif, which first applies the Affinity Propagation (AP) clustering in DNA sequences to produce informative and good candidate motifs and then employs Expectation Maximization (EM) refinement to obtain the optimal motifs from the candidate motifs. Experimental results both on simulated data sets and real biological data sets show that APMotif usually outperforms four other widely used algorithms in terms of high prediction accuracy.
School of Computer Science and Technology, Xidian University, Xi'an 710071, China.
Chunxiao
C
Sun
School of Computer Science and Technology, Xidian University, Xi'an 710071, China.
Hongwei
H
Huo
School of Computer Science and Technology, Xidian University, Xi'an 710071, China.
Qiang
Q
Yu
School of Computer Science and Technology, Xidian University, Xi'an 710071, China.
Haitao
H
Guo
School of Computer Science and Technology, Xidian University, Xi'an 710071, China.
Zhigang
Z
Sun
D000465:Algorithms; D004247:DNA / Q000235:genetics*; D059372:Nucleotide Motifs; D020218:Response Elements; D017422:Sequence Analysis, DNA / Q000379:methods*
D004247:DNA