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OrthoInspector: comprehensive orthology analysis and visual exploration

Benjamin Linard*, Julie D Thompson, Olivier Poch and Odile Lecompte

Author Affiliations

Laboratoire de bioinformatique et genomique integratives, Département de Biologie et Génomique Structurales CNRS/INSERM/UDS, Institut de Génétique et de Biologie Moléculaire et Cellulaire, 1 rue Laurent Fries, 67404, Illkirch, Cedex, France

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BMC Bioinformatics 2011, 12:11  doi:10.1186/1471-2105-12-11

Published: 10 January 2011

Abstract

Background

The accurate determination of orthology and inparalogy relationships is essential for comparative sequence analysis, functional gene annotation and evolutionary studies. Various methods have been developed based on either simple blast all-versus-all pairwise comparisons and/or time-consuming phylogenetic tree analyses.

Results

We have developed OrthoInspector, a new software system incorporating an original algorithm for the rapid detection of orthology and inparalogy relations between different species. In comparisons with existing methods, OrthoInspector improves detection sensitivity, with a minimal loss of specificity. In addition, several visualization tools have been developed to facilitate in-depth studies based on these predictions. The software has been used to study the orthology/in-paralogy relationships for a large set of 940,855 protein sequences from 59 different eukaryotic species.

Conclusion

OrthoInspector is a new software system for orthology/paralogy analysis. It is made available as an independent software suite that can be downloaded and installed for local use. Command line querying facilitates the integration of the software in high throughput processing pipelines and a graphical interface provides easy, intuitive access to results for the non-expert.