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Originally published In Press as doi:10.1074/mcp.M400110-MCP200 on February 18, 2005.
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Molecular & Cellular Proteomics 4:683-692, 2005.
© 2005 by The American Society for Biochemistry and Molecular Biology, Inc.


Research

Identifying Regulatory Subnetworks for a Set of Genes*

Michelle S. Scott{ddagger},§, Theodore Perkins{ddagger}, Scott Bunnell{ddagger},§,||, François Pepin{ddagger},§,||, David Y. Thomas§ and Michael Hallett{ddagger},§,||,**

From the {ddagger} McGill Centre for Bioinformatics, 3775 University Street, Montreal H3A 2B4 and the § Department of Biochemistry, 3655 Promenade Sir William Osler, McGill University, Montreal H3G 1Y6, Canada

High throughput genomic/proteomic strategies, such as microarray studies, drug screens, and genetic screens, often produce a list of genes that are believed to be important for one or more reasons. Unfortunately it is often difficult to discern meaningful biological relationships from such lists. This study presents a new bioinformatic approach that can be used to identify regulatory subnetworks for lists of significant genes or proteins. We demonstrate the utility of this approach using an interaction network for yeast constructed from BIND, TRANSFAC, SCPD, and chromatin immunoprecipitation (ChIP)-Chip data bases and lists of genes from well known metabolic pathways or differential expression experiments. The approach accurately rediscovers known regulatory elements of the heat shock response as well as the gluconeogenesis, galactose, glycolysis, and glucose fermentation pathways in yeast. We also find evidence supporting a previous conjecture that approximately half of the enzymes in a metabolic pathway are transcriptionally co-regulated. Finally we demonstrate a previously unknown connection between GAL80 and the diauxic shift in yeast.


** To whom correspondence should be addressed. Tel.: 514-398-5928; E-mail: hallett{at}mcb.mcgill.ca


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