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Related Experiment Videos

Tandem repeats finder: a program to analyze DNA sequences

G Benson1

  • 1Department of Biomathematical Sciences, Mount Sinai School of Medicine, New York, NY 10029-6574, USA. benson@ecology.biomath.mssm.edu

Nucleic Acids Research
|December 24, 1998
PubMed
Summary

This study introduces a novel algorithm for detecting DNA tandem repeats without prior pattern specification. The new method efficiently identifies these repeats, even those with significant mutations, advancing genomic analysis.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Molecular Biology

Background:

  • Tandem repeats are contiguous DNA sequences with multiple copies of a pattern.
  • These repeats are implicated in human diseases and play roles in gene regulation and evolution.
  • Detecting and characterizing tandem repeats in genomic data has been challenging due to limitations in existing methods.

Purpose of the Study:

  • To develop a new algorithm for identifying DNA tandem repeats.
  • To overcome the limitations of methods requiring pre-specified patterns or sizes.
  • To enable more comprehensive analysis of tandem repeat sequences and their properties.

Main Methods:

  • A novel algorithm was developed to find tandem repeats without needing to specify the pattern or size.

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  • The algorithm models tandem repeats based on percent identity and indel frequency between adjacent copies.
  • Statistically based recognition criteria were employed for robust detection.

    • Main Results:

    • The algorithm demonstrated speed and effectiveness in detecting tandem repeats.
    • It successfully identified tandem repeats that have undergone substantial mutational changes.
    • The method was validated on diverse sequences, including human genes and yeast chromosomes, ranging from 3 kb to 700 kb.

    Conclusions:

    • The developed algorithm provides an efficient and versatile tool for tandem repeat detection in genomic sequences.
    • This advancement facilitates deeper understanding of the roles and implications of tandem repeats in genetics and disease.
    • A web server is available for automated use of the tandem repeat finding program.