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Nat Genet. 2002 Aug;31(4):370-7. Epub 2002 Jul 22.

Revealing modular organization in the yeast transcriptional network.

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  • 1Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, 76100, Israel.

Abstract

Standard clustering methods can classify genes successfully when applied to relatively small data sets, but have limited use in the analysis of large-scale expression data, mainly owing to their assignment of a gene to a single cluster. Here we propose an alternative method for the global analysis of genome-wide expression data. Our approach assigns genes to context-dependent and potentially overlapping 'transcription modules', thus overcoming the main limitations of traditional clustering methods. We use our method to elucidate regulatory properties of cellular pathways and to characterize cis-regulatory elements. By applying our algorithm systematically to all of the available expression data on Saccharomyces cerevisiae, we identify a comprehensive set of overlapping transcriptional modules. Our results provide functional predictions for numerous genes, identify relations between modules and present a global view on the transcriptional network.

PMID:
12134151
[PubMed - indexed for MEDLINE]
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