Footer: a quantitative comparative genomics method for efficient recognition of cis-regulatory elements.
The search for mammalian DNA regulatory regions poses a challenging problem in computational biology. The short length of the DNA patterns compared with the size of the promoter regions and the degeneracy of the patterns makes their identification difficult. One way to overcome this problem is to use evolutionary information to reduce the number of false-positive predictions. We developed a novel method for pattern identification that compares a pair of putative binding sites in two species (e.g., human and mouse) and assigns two probability scores based on the relative position of the sites in the promoter and their agreement with a known model of binding preferences. We tested the algorithm's ability to predict known binding sites on various promoters. Overall, it exhibited 83% sensitivity and the specificity was 72%, which is a clear improvement over existing methods. Our algorithm also successfully predicted two novel NF-kappaB binding sites in the promoter region of the mouse autotaxin gene (ATX, ENPP2), which we were able to verify by using chromatin immunoprecipitation assay coupled with quantitative real-time PCR.
Corcoran
David L
DL
Department of Biostatistics, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15621, USA.
Feingold
Eleanor
E
Dominick
Jessica
J
Wright
Marietta
M
Harnaha
Jo
J
Trucco
Massimo
M
Giannoukakis
Nick
N
Benos
Panayiotis V
PV
D000465:Algorithms; D000818:Animals; D002460:Cell Line; D005956:Glucose-6-Phosphate Isomerase / Q000235:genetics*; D006023:Glycoproteins / Q000235:genetics*; D006801:Humans; D051379:Mice; D009097:Multienzyme Complexes / Q000235:genetics*; D016328:NF-kappa B / Q000235:genetics; D043264:Phosphodiesterase I / Q000235:genetics*; D010727:Phosphoric Diester Hydrolases; D011237:Predictive Value of Tests; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D011755:Pyrophosphatases / Q000235:genetics*; D017422:Sequence Analysis, DNA / Q000379:methods*; D000099189:Lysophospholipase D
D005956:Glucose-6-Phosphate Isomerase; D006023:Glycoproteins; D009097:Multienzyme Complexes; D016328:NF-kappa B; D043264:Phosphodiesterase I; D010727:Phosphoric Diester Hydrolases; D011755:Pyrophosphatases; D000099189:Lysophospholipase D