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Computational Approaches to Studying Molecular Phylogenetics

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Abstract

Molecular phylogenetics is the study of evolutionary history among organisms. After selecting sequences and obtaining an optimal alignment for patterns of divergence, the next step is to build a graphical representation called a phylogenetic tree with each sequence as a branch of it. A tree represents a prediction of evolutionary relationships among organisms. In addition to uncovering evolutionary relationships, phylogenetic analysis finds applications in numerous ways such as guiding mutagenesis in laboratory, peptide design, and quantification of gene variants. This chapter focuses on the methodology of building a phylogenetic tree, which requires a careful selection of parameters as well as statistical analyses of the predictions for accuracy and robustness. We also discuss a number of tools which are based on algorithms with different underlying assumptions. These tools are available to perform different steps of any phylogenetic analysis including inference of phylogenetic trees and their visualization, estimating divergence times, mining online databases, estimating rates of molecular evolution, inferring ancestral sequences, and testing evolutionary hypotheses.

Even if we didn’t have a single fossil, the evidence for evolution would be absolutely secure because of comparative anatomy, comparative biochemistry, and geographical distribution

Dr. Richard Dawkins (The Blind Watchmaker)

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Acknowledgments

This work is supported by a grant from the NIH Research Project Grant Program (2R01GM079656). The authors are grateful to Dr. David C. Marciano, Dr. Angela Wilkins, and Dr. Rhonald C. Lua for their helpful comments.

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Atri, B., Lichtarge, O. (2018). Computational Approaches to Studying Molecular Phylogenetics. In: Shanker, A. (eds) Bioinformatics: Sequences, Structures, Phylogeny . Springer, Singapore. https://doi.org/10.1007/978-981-13-1562-6_9

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