Incorporating Ontology-Driven Similarity Knowledge into Functional Genomics: An Exploratory Study

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  • Venue:
  • BIBE '04 Proceedings of the 4th IEEE Symposium on Bioinformatics and Bioengineering
  • Year:
  • 2004

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Abstract

This research explores the feasibility of semanticsimilarity approaches to supporting predictive tasks infunctional genomics. It aims to establish potentialrelationships between ontology-based similarity ofgene products and important functional properties,such as gene expression correlation. Similaritymeasures based on the information content of the GeneOntology (GO) were analyzed. Models have beenimplemented using data obtained from well-knownstudies in S. cerevisiae. Results suggest that there mayexist significant relationships between gene expressioncorrelation and semantic similarity. Analyses ofprotein complex data show that, in general, there is asignificant correlation between the semantic similarityexhibited by a pair of genes and the probability offinding them in the same complex. These results canalso be interpreted as an assessment of the quality andconsistency of the information represented in the GO.