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Evolutionary Relationships through Genome Comparisons

Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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Understanding the evolutionary relationships among microorganisms is fundamental to microbial ecology and taxonomy. Phylogenetic trees are essential tools for inferring these relationships, relying primarily on comparative analyses of molecular sequences such as DNA, RNA, or proteins. In microbial studies, these trees typically depict the evolutionary paths of diverse bacterial and archaeal species by mapping genetic differences accumulated over time.Phylogenetic trees are composed of tips,...
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A Practical Guide to Phylogenetics for Nonexperts
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BLAST-EXPLORER helps you building datasets for phylogenetic analysis.

Alexis Dereeper1, Stephane Audic, Jean-Michel Claverie

  • 1Information Génomique & Structurale-CNRS-UPR2589, Institut de Microbiologie de la Méditerranée-IFR 88, Marseille, France.

BMC Evolutionary Biology
|January 14, 2010
PubMed
Summary

Selecting homologous sequences for phylogenetic analysis is critical. BLAST-Explorer is a new web tool that simplifies this process by interactively exploring BLAST results for better sequence dataset construction.

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Area of Science:

  • Bioinformatics
  • Computational Biology
  • Molecular Evolution

Background:

  • Accurate homologous sequence selection is vital for phylogenetic and molecular evolution studies.
  • Current tools like BLAST are not optimized for constructing high-quality phylogenetic datasets.
  • Dataset construction is highly dependent on the specific research question.

Purpose of the Study:

  • To develop a user-friendly web application for improved homologous sequence selection.
  • To integrate BLAST searching with tools for interactive exploration and flexible sequence selection.
  • To facilitate the creation of robust datasets for phylogenetic analyses.

Main Methods:

  • Designed BLAST-Explorer, a web-based application combining BLAST search with interactive tools.
  • Enabled phylogenetic-oriented exploration of BLAST results.
  • Provided flexible criteria for selecting homologous sequences from BLAST hits.

Main Results:

  • BLAST-Explorer offers an intuitive graphical interface for visualizing BLAST results.
  • Facilitates interactive selection and retrieval of homologous sequences based on diverse criteria.
  • Allows seamless integration with external analysis tools or the Phylogeny.fr platform for tree reconstruction.

Conclusions:

  • BLAST-Explorer simplifies the construction of sequence datasets for phylogenetic studies.
  • Offers an enriched output compared to standard BLAST servers.
  • Provides a valuable resource for researchers in molecular evolution and phylogenetics.