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Related Experiment Videos

Nucleic acid sequence analysis using DNAzymes.

Murray J Cairns1, Lun-Quan Sun

  • 1Johnson and Johnson Research Laboratories, Australian Technology Park, Eveleigh.

Methods in Molecular Biology (Clifton, N.J.)
|March 16, 2004
PubMed
Summary
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The "10-23" DNA enzyme precisely identifies genetic variations in human papillomavirus (HPV) by cleaving specific DNA sequences. This DNAzyme technology enables accurate detection of HPV genotypes and single-nucleotide polymorphisms (SNPs).

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • The
  • 10-23
  • RNA-cleaving DNA enzyme exhibits high sequence specificity.
  • This characteristic can be leveraged to detect subtle variations in nucleic acid sequences.
  • Human papillomavirus (HPV) genotypes possess conserved and polymorphic regions within their genomes, such as the L1 gene.

Purpose of the Study:

  • To investigate the potential of the
  • 10-23
  • DNAzyme for discriminating between different human papillomavirus (HPV) genotypes.
  • To develop a method for generating type-specific DNAzyme-cleavable substrates for HPV detection.

Main Methods:

  • Comparing the cleavage activity of DNAzymes targeting conserved L1 gene segments from various HPV genotypes.

Related Experiment Videos

  • Designing chimeric primers with RNA bases for polymerase chain reaction (PCR) amplification to create DNAzyme-cleavable amplicons.
  • Utilizing DNAzyme-mediated cleavage of PCR amplicons to determine HPV status in genomic DNA samples.

    • Main Results:

    • DNAzyme activity demonstrated high sensitivity to mismatches between the DNAzyme's binding domain and polymorphic substrate sequences.
    • Type-specific DNAzyme-cleavable substrates were successfully generated using PCR with chimeric primers.
    • The method accurately identified HPV16 in Caski cell genomic DNA, confirming the DNAzyme's specificity and utility.

    Conclusions:

    • The
    • 10-23
    • DNAzyme's sequence specificity is effective for distinguishing between HPV genotypes.
    • A novel method employing DNAzymes and PCR with chimeric primers allows for specific detection of nucleic acid variations, including SNPs.
    • This approach offers a sensitive and specific tool for molecular diagnostics and genetic analysis.