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Open Access Highly Accessed Research article

iRefR: an R package to manipulate the iRefIndex consolidated protein interaction database

Antonio Mora12 and Ian M Donaldson12*

Author Affiliations

1 Department for Molecular Biosciences, University of Oslo, P.O. Box 1041 Blindern, 0316 Oslo, Norway

2 The Biotechnology Centre of Oslo, University of Oslo, P.O. Box 1125 Blindern, 0317 Oslo, Norway

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BMC Bioinformatics 2011, 12:455  doi:10.1186/1471-2105-12-455

Published: 24 November 2011

Abstract

Background

The iRefIndex addresses the need to consolidate protein interaction data into a single uniform data resource. iRefR provides the user with access to this data source from an R environment.

Results

The iRefR package includes tools for selecting specific subsets of interest from the iRefIndex by criteria such as organism, source database, experimental method, protein accessions and publication identifier. Data may be converted between three representations (MITAB, edgeList and graph) for use with other R packages such as igraph, graph and RBGL.

The user may choose between different methods for resolving redundancies in interaction data and how n-ary data is represented. In addition, we describe a function to identify binary interaction records that possibly represent protein complexes. We show that the user choice of data selection, redundancy resolution and n-ary data representation all have an impact on graphical analysis.

Conclusions

The package allows the user to control how these issues are dealt with and communicate them via an R-script written using the iRefR package - this will facilitate communication of methods, reproducibility of network analyses and further modification and comparison of methods by researchers.