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A Practical Guide to Phylogenetics for Nonexperts
Published on: February 5, 2014
Inferring orthology and paralogy
Adrian M Altenhoff1, Christophe Dessimoz
1Department of Computer Science, ETH Zurich, Zurich, Switzerland.
Methods in Molecular Biology (Clifton, N.J.)
|March 13, 2012
Summary
Understanding orthologs and paralogs is crucial for phylogenetic tree inference and protein function annotation. This chapter reviews methods for inferring these gene relationships, their applications, and future directions.
Area of Science:
- Bioinformatics
- Evolutionary Biology
- Genomics
Background:
- Distinguishing between orthologs (speciation) and paralogs (duplication) is fundamental in genomics.
- These gene relationships are critical for phylogenetic tree inference and protein function annotation.
Purpose of the Study:
- To provide a comprehensive overview of methods for inferring orthology and paralogy.
- To discuss conceptual differences, verification, and benchmarking of orthology predictions.
- To review applications and future developments in orthology inference.
Main Methods:
- Survey of graph-based approaches and their grouping strategies.
- Examination of tree-based approaches, including gene/species tree reconciliation.
- Discussion of conceptual differences among various inference methods and databases.
Main Results:
- Orthology and paralogy inference methods are diverse, encompassing graph and tree-based strategies.
- Verification and benchmarking of orthology predictions remain challenging.
- Various applications of orthologous genes, groups, and reconciled trees are reviewed.
Conclusions:
- Accurate orthology inference is vital for numerous biological applications.
- Future methodological developments are needed to improve prediction accuracy and benchmarking.
- This chapter provides a foundational understanding of orthology and paralogy inference.
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