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2013 ; 29
(11
): 1390-8
Nephropedia Template TP
gab.com Text
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Bayesian hierarchical model of protein-binding microarray k-mer data reduces
noise and identifies transcription factor subclasses and preferred k-mers
#MMPMID23559638
Jiang B
; Liu JS
; Bulyk ML
Bioinformatics
2013[Jun]; 29
(11
): 1390-8
PMID23559638
show ga
MOTIVATION: Sequence-specific transcription factors (TFs) regulate the expression
of their target genes through interactions with specific DNA-binding sites in the
genome. Data on TF-DNA binding specificities are essential for understanding how
regulatory specificity is achieved. RESULTS: Numerous studies have used universal
protein-binding microarray (PBM) technology to determine the in vitro binding
specificities of hundreds of TFs for all possible 8 bp sequences (8mers). We have
developed a Bayesian analysis of variance (ANOVA) model that decomposes these
8mer data into background noise, TF familywise effects and effects due to the
particular TF. Adjusting for background noise improves PBM data quality and
concordance with in vivo TF binding data. Moreover, our model provides
simultaneous identification of TF subclasses and their shared sequence
preferences, and also of 8mers bound preferentially by individual members of TF
subclasses. Such results may aid in deciphering cis-regulatory codes and
determinants of protein-DNA binding specificity. AVAILABILITY AND IMPLEMENTATION:
Source code, compiled code and R and Python scripts are available from
http://thebrain.bwh.harvard.edu/hierarchicalANOVA. SUPPLEMENTARY INFORMATION:
Supplementary data are available at Bioinformatics online.