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Related Experiment Videos

Selection of oligonucleotide probes for protein coding sequences.

Xiaowei Wang1, Brian Seed

  • 1Department of Molecular Biology, 50 Blossom Street, Massachusetts General Hospital, Boston 02114, USA.

Bioinformatics (Oxford, England)
|May 2, 2003
PubMed
Summary

This study introduces a new strategy for selecting oligonucleotide probes for microarrays, focusing exclusively on protein-coding regions. This approach improves probe design by minimizing issues with untranslated regions and enhancing RNA expression analysis.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • Oligonucleotide (oligo) probes are widely used for RNA expression analysis via microarrays.
  • Existing oligo collections often suffer from poor sequence validation and bias towards untranslated regions (UTRs).
  • This limits the accuracy and scope of RNA expression studies.

Purpose of the Study:

  • To develop and describe a strategy for selecting oligonucleotide probes exclusively from protein-coding regions.
  • To outline the design constraints and present a software tool for implementing this strategy.
  • To improve the reliability and specificity of microarray-based RNA expression analysis.

Main Methods:

  • Sequential application of simple filters to candidate oligo sequences.

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  • Primary filter: rejection of probes with contiguous identity exceeding a 15-base match threshold.
  • Secondary filters: removal of low-complexity sequences and probes with poor predicted accessibility; global sequence alignment as a secondary test.

    • Main Results:

    • Rejection of oligos with 15-base perfect matches is a feasible strategy for mammalian RNA analysis.
    • Additional filters for low complexity and accessibility had minimal impact on candidate probe space.
    • Splice isoform analysis requires examining hybridization patterns of partially redundant oligonucleotides.

    Conclusions:

    • A robust strategy for designing oligonucleotide probes from protein-coding regions has been established.
    • The developed method enhances the specificity and reliability of microarray probe selection.
    • The OligoPicker software tool facilitates the broad application of this strategy.