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Labeling DNA Probes03:31

Labeling DNA Probes

DNA probes are fragments of DNA labeled with a reporter tag to enable their detection or purification. The resulting labeled DNA probes can then hybridize to target nucleic acid sequences through complementary base-pairing, and may be used to recover or identify these regions.
Radioisotopes, fluorophores, or small molecule binding partners like biotin or digoxigenin, are the most widely used reporter tags for labeling DNA probes. These labels can be attached to the probe DNA molecule via...

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Comprehensive viral oligonucleotide probe design using conserved protein regions.

Omar J Jabado1, Yang Liu, Sean Conlan

  • 1Center for Infection and Immunity, Mailman School of Public Health, Columbia University, 722 West 168th Street, Room 1801, New York, NY 10032, USA.

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|December 15, 2007
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Summary

This study introduces a novel oligonucleotide probe design strategy for microbial surveillance, focusing on virus detection. The method leverages protein sequences to create adaptable probe sets, improving coverage of rapidly evolving viral databases.

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Area of Science:

  • Microbiology
  • Virology
  • Bioinformatics
  • Genomics

Background:

  • Oligonucleotide microarrays are crucial for microbial surveillance and discovery, requiring highly multiplexed assays for diverse genetic targets.
  • Designing comprehensive microbial probe sets is challenging due to increasing printing densities and the rapid evolution of viral sequences.
  • Static probe solutions struggle to keep pace with expanding viral databases and sequence variability.

Purpose of the Study:

  • To present a new strategy for oligonucleotide probe design specifically addressing challenges in virus detection and discovery.
  • To develop a method that is responsive to the dynamic nature of viral sequences and database expansion.
  • To enhance the comprehensiveness and adaptability of microbial probe sets for virology applications.

Main Methods:

  • The strategy utilizes protein sequences for probe design, integrating the Protein Families database (Pfam).
  • Motif-finding algorithms are employed to identify suitable oligonucleotide probes within conserved amino acid regions and untranslated sequences.
  • In silico testing was performed using an experimentally derived thermodynamic model to assess probe performance.

Main Results:

  • The protein sequence-based probe design strategy demonstrated effectiveness in identifying probes for conserved regions.
  • In silico validation indicated a high degree of coverage for the viral sequence database.
  • The method offers a dynamic solution to the limitations of static probe sets in virology.

Conclusions:

  • The presented probe design strategy offers a robust and adaptable approach for microbial surveillance, particularly in virology.
  • Utilizing protein sequences and motif analysis provides a powerful tool for designing effective oligonucleotide probes against evolving viral targets.
  • This method significantly improves the potential for comprehensive virus detection and discovery in large, dynamic sequence databases.