Context-specific independence mixture modeling for positional weight matrices
Author(s) -
Benjamin Georgi,
Alexander Schliep
Publication year - 2006
Publication title -
bioinformatics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.599
H-Index - 390
eISSN - 1367-4811
pISSN - 1367-4803
DOI - 10.1093/bioinformatics/btl249
Subject(s) - overfitting , robustness (evolution) , computer science , context (archaeology) , biological system , pattern recognition (psychology) , artificial intelligence , algorithm , mathematics , statistics , biology , genetics , artificial neural network , paleontology , gene
A positional weight matrix (PWM) is a statistical representation of the binding pattern of a transcription factor estimated from known binding site sequences. Previous studies showed that for factors which bind to divergent binding sites, mixtures of multiple PWMs increase performance. However, estimating a conventional mixture distribution for each position will in many cases cause overfitting.
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