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Related Experiment Videos

A high throughput fluorogenic substrate for stromelysin (MMP-3)

D M Bickett1, M D Green, C Wagner

  • 1Department of Biochemistry, Glaxo Research Institute, Research Triangle Park, North Carolina 27709.

Annals of the New York Academy of Sciences
|September 6, 1994
PubMed
Summary
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Researchers developed a new fluorogenic substrate to screen stromelysin inhibitors. This tool enables efficient detection of enzyme activity for studying tumor metastasis and arthritis.

Area of Science:

  • Biochemistry
  • Enzymology
  • Drug Discovery

Background:

  • Stromelysin, a matrix metalloproteinase, contributes to tumor metastasis and inflammatory diseases like rheumatoid arthritis.
  • Developing effective inhibitors requires robust screening assays.
  • Existing methods may lack the sensitivity or compatibility for high-throughput screening.

Purpose of the Study:

  • To create a novel fluorogenic substrate for stromelysin.
  • To enable efficient screening of potential stromelysin inhibitors.
  • To facilitate research in cancer metastasis and inflammatory disease therapeutics.

Main Methods:

  • Synthesized a new fluorogenic peptide substrate incorporating NBD and DMC fluorophores.
  • Utilized a quenched substrate design with efficient Förster Resonance Energy Transfer (FRET).

Related Experiment Videos

  • Validated the substrate's performance in competition assays with known stromelysin inhibitors.

    • Main Results:

    • The new substrate, NBD-Arg-Pro-Lys-Pro-Leu-Ala-Nva-Trp-Lys-(DMC)-NH2, exhibits 95% quenching.
    • The fluorescent product is readily detectable with optimized excitation/emission spectra (EX350/EM465).
    • The substrate demonstrated a relative kcat/Km of half that of the parent peptide in competition assays.

    Conclusions:

    • The developed fluorogenic substrate is highly sensitive and suitable for 96-well plate readers.
    • This tool facilitates routine in vitro activity determination of stromelysin inhibitors.
    • It represents a valuable advancement for drug discovery targeting stromelysin-related pathologies.