Prediction of Novel Pathway Elements and Interactions Using Bayesian Networks

Hodges, Andrew; Woolf, Peter J.; ξ, Yongqun He

doi:10.5772/18402

Systems and Computational Biology - Molecular and Cellular Experimental Systems 2011

DOI: 10.5772/18402

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Prediction of Novel Pathway Elements and Interactions Using Bayesian Networks

Andrew Hodges¹,

Peter J. Woolf²,

Yongqun He ξ³

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2012

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A Network-based Approach for Predicting Missing Pathway Interactions

2012

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Embedded within large-scale protein interaction networks are signaling pathways that encode response cascades in the cell. Unfortunately, even for well-studied species like S. cerevisiae, only a fraction of all true protein interactions are known, which makes it difficult to reason about the exact flow of signals and the corresponding causal relations in the network. To help address this problem, we introduce a framework for predicting new interactions that aid connectivity between upstream proteins (sources) and downstream transcription factors (targets) of a particular pathway. Our algorithms attempt to globally minimize the distance between sources and targets by finding a small set of shortcut edges to add to the network. Unlike existing algorithms for predicting general protein interactions, by focusing on proteins involved in specific responses our approach homes-in on pathway-consistent interactions. We applied our method to extend pathways in osmotic stress response in yeast and identified several missing interactions, some of which are supported by published reports. We also performed experiments that support a novel interaction not previously reported. Our framework is general and may be applicable to edge prediction problems in other domains.

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A Network-based Approach for Predicting Missing Pathway Interactions

2012

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Prediction of Novel Pathway Elements and Interactions Using Bayesian Networks

Cited by 1 publication

References 53 publications

A Network-based Approach for Predicting Missing Pathway Interactions

A Network-based Approach for Predicting Missing Pathway Interactions

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