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          Institute: MPI für molekulare Genetik     Collection: Department of Computational Molecular Biology     Display Documents

ID: 404587.0, MPI für molekulare Genetik / Department of Computational Molecular Biology
Syntenator: Multiple gene order alignments with a gene-specific scoring function
Authors:Rödelsperger, Christian; Dieterich, Christoph
Date of Publication (YYYY-MM-DD):2008-11-06
Title of Journal:Algorythms for Molecular Biology
Start Page:14
End Page:14
Copyright:© 2008 Rödelsperger and Dieterich; licensee BioMed Central Ltd.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Review Status:not specified
Audience:Experts Only
Abstract / Description:Background
Identification of homologous regions or conserved syntenies across genomes is one crucial step in comparative genomics. This task is usually performed by genome alignment softwares like WABA or blastz. In case of conserved syntenies, such regions are defined as conserved gene orders. On the gene order level, homologous regions can even be found between distantly related genomes, which do not align on the nucleotide sequence level.
We present a novel approach to identify regions of conserved synteny across multiple genomes. Syntenator represents genomes and alignments thereof as partial order graphs (POGs). These POGs are aligned by a dynamic programming approach employing a gene-specific scoring function. The scoring function reflects the level of protein sequence similarity for each possible gene pair. Our method consistently defines larger homologous regions in pairwise gene order alignments than nucleotide-level comparisons. Our method is superior to methods that work on predefined homology gene sets (as implemented in Blockfinder). Syntenator successfully reproduces 80% of the EnsEMBL man-mouse conserved syntenic blocks. The full potential of our method becomes visible by comparing remotely related genomes and multiple genomes. Gene order alignments potentially resolve up to 75% of the EnsEMBL 1:many orthology relations and 27% of the many:many orthology relations.
We propose Syntenator as a software solution to reliably infer conserved syntenies among distantly related genomes. The software is available from webcite.
Comment of the Author/Creator:The electronic version of this article is the complete one and can be found online at:
External Publication Status:published
Document Type:Article
Communicated by:Martin Vingron
Affiliations:MPI für Entwicklungsbiologie/Abteilung 4 - Evolutionsbiologie (Ralf J. Sommer)
External Affiliations:1.Institute of Medical Genetics, Charité University Hospital, Berlin, Germany.
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