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Related Experiment Videos

Computing multiple sequence/structure alignments with the T-coffee package.

Cedric Notredame1, Karsten Suhre

  • 1Swiss Institute of Bioinformatics, Epalinges, Switzerland.

Current Protocols in Bioinformatics
|April 23, 2008
PubMed
Summary
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The FASTA package offers advanced sequence similarity searching for proteins and DNA, outperforming BLASTN in DNA comparisons and providing accurate statistical estimates. It enables comprehensive characterization of biological sequences.

Area of Science:

  • Bioinformatics
  • Computational Biology
  • Genomics

Background:

  • Sequence similarity searching is crucial for understanding protein and DNA function.
  • Existing tools like BLAST have limitations, especially for short sequences.
  • FASTA offers a powerful alternative with enhanced capabilities.

Purpose of the Study:

  • To introduce and detail the FASTA package for biological sequence analysis.
  • To highlight FASTA's advantages over BLAST, including sensitivity and statistical accuracy.
  • To provide protocols for using FASTA in various comparison types (protein:protein, protein:DNA, DNA:DNA).

Main Methods:

  • Utilizing FASTA's suite of similarity searching programs.
  • Employing diverse database formats, including MySQL sequence databases.

Related Experiment Videos

  • Performing protein-protein, protein-DNA, and DNA-DNA sequence comparisons.

    • Main Results:

    • FASTA provides comprehensive similarity searching, including for short peptides and oligonucleotides.
    • FASTA demonstrates higher sensitivity than BLASTN for DNA sequence comparisons.
    • Accurate statistical significance estimates are a key feature of FASTA.

    Conclusions:

    • FASTA is a valuable and sensitive tool for characterizing protein and DNA sequences.
    • Its capabilities extend beyond BLAST, offering broader applications in bioinformatics.
    • The package supports various database formats and comparison types for flexible analysis.