Discovering statistically significant biclusters in gene expression data

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ID: 301839
2002
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Abstract
Abstract In gene expression data, a bicluster is a subset of the genes exhibiting consistent patterns over a subset of the conditions. We propose a new method to detect significant biclusters in large expression datasets. Our approach is graph theoretic coupled with statistical modelling of the data. Under plausible assumptions, our algorithm is polynomial and is guaranteed to find the most significant biclusters. We tested our method on a collection of yeast expression profiles and on a human cancer dataset. Cross validation results show high specificity in assigning function to genes based on their biclusters, and we are able to annotate in this way 196 uncharacterized yeast genes. We also demonstrate how the biclusters lead to detecting new concrete biological associations. In cancer data we are able to detect and relate finer tissue types than was previously possible. We also show that the method outperforms the biclustering algorithm of Cheng and Church (2000). Contact: amos@tau.ac.il; roded@tau.ac.il; rshamir@tau.ac.il Availability: *These authors contributed equally to this work.
Reference Key
openalex_W2136107412 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Amos Tanay, Roded Sharan, Ron Shamir
Journal BMC Bioinformatics
Year 2002
DOI
10.1093/bioinformatics/18.suppl_1.s136
URL
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