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Related Experiment Videos

Long, polymorphic microsatellites in simple organisms

D Field1, C Wills

  • 1Department of Biology-0116, University of California at San Diego, La Jolla 92093-0116, USA.

Proceedings. Biological Sciences
|February 22, 1996
PubMed
Summary
This summary is machine-generated.

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Simple organisms like fungi and bacteria possess unique microsatellites, often found in genes. These simple-organism microsatellites can serve as valuable molecular markers for tracking microbial evolution and disease outbreaks.

Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Microsatellites, repetitive DNA sequences, are crucial genetic markers.
  • Previous research focused on microsatellites in higher eukaryotes, neglecting simpler organisms.
  • GenBank contains a wealth of microsatellite data across diverse life forms.

Purpose of the Study:

  • To investigate the phylogenetic distribution of long, perfect microsatellites in GenBank.
  • To characterize microsatellites found in simple organisms (e.g., bacteria, fungi, viruses).
  • To explore the potential of these microsatellites as molecular markers.

Main Methods:

  • Analysis of microsatellite sequences from GenBank.
  • Phylogenetic distribution assessment.

Related Experiment Videos

  • Characterization of repeat motifs, locations (exons/introns), and base composition (A+T richness).

    • Main Results:

    • Simple organisms contributed 78 out of 375 examined microsatellite sequences.
    • These microsatellites are predominantly trinucleotide repeats, often A+T rich, and located in exons.
    • Independent clones of simple-organism microsatellites showed length polymorphisms.

    Conclusions:

    • Simple-organism microsatellites, despite being termed 'junk' DNA, may have functional roles in economical genomes.
    • Their presence in genes and potential for polymorphism suggests functional significance.
    • These microsatellites offer a promising source for molecular markers in microbial epidemiology and evolutionary studies.