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Enzyme-mediated individual nanoparticle release assay.

James R Glass1, Janet C Dickerson, David A Schultz

  • 1Seashell Technology, LLC, La Jolla, CA 92037, USA.

Analytical Biochemistry
|April 20, 2006
PubMed
Summary
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This study introduces a novel nanoparticle-based assay for measuring enzyme activity. The method detects enzyme-mediated DNA cleavage in real-time, enabling high-throughput screening of enzyme modulators.

Area of Science:

  • Biochemistry
  • Nanotechnology
  • Molecular Biology

Background:

  • Limited methods exist for detecting functional enzyme activity and modulators.
  • Nanoparticles are valuable biological labels in various assays.
  • Enzyme activity detection is crucial for drug discovery and diagnostics.

Purpose of the Study:

  • To develop a novel assay for measuring enzyme activity using nanoparticle release.
  • To demonstrate the assay's capability for real-time, specific detection of DNA cleavage.
  • To validate the platform for high-throughput screening of enzyme modulators.

Main Methods:

  • Utilized optical detection of nanoparticles released from a DNA tether.
  • Employed dark-field optical microscopy and digital image capture for nanoparticle tracking.

Related Experiment Videos

  • Developed a release assay format measuring enzyme-mediated cleavage of DNA tethers.

    • Main Results:

    • Successfully measured enzyme-mediated, individual DNA cleavage events in real-time.
    • Demonstrated high specificity and rapid detection capabilities.
    • Successfully detected and discriminated between methylated and nonmethylated DNA.

    Conclusions:

    • The developed nanoparticle release assay is a sensitive and specific method for enzyme activity measurement.
    • This novel platform enables high-throughput screening of enzyme modulators.
    • The assay shows potential for applications in epigenetics and drug discovery.