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Related Experiment Videos

Enzyme fragment complementation: a flexible high throughput screening assay technology.

Richard M Eglen1

  • 1DiscoveRx Corporation, Fremont, CA 94538, USA. reglen@discoverx.com

Assay and Drug Development Technologies
|April 20, 2004
PubMed
Summary
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Beta-galactosidase complementation assays enable sensitive detection of cellular analytes and protein expression. This technology offers robust, flexible screening for drug discovery and biological pathway analysis.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Assay Development

Background:

  • Enzyme complementation assays utilize fragments of beta-galactosidase for signal generation.
  • The ProLabel fragment can be conjugated or fused to various molecules for diverse applications.
  • High-affinity complementation forms stable enzyme complexes for sensitive detection.

Purpose of the Study:

  • To review screening assays based on beta-galactosidase complementation.
  • To highlight applications in measuring cellular analytes and protein expression.
  • To demonstrate the flexibility and robustness of this assay technology.

Main Methods:

  • Chemical conjugation of ProLabel to small molecules for competitive binding assays.
  • Recombinant fusion of ProLabel to proteins for expression analysis.

Related Experiment Videos

  • Beta-galactosidase complementation in homogeneous, cell-free, and cell-based assays.

    • Main Results:

    • Developed assays for measuring cellular analytes like cyclic AMP.
    • Enabled measurement of enzyme activities including kinases and proteases.
    • Facilitated sensitive detection of protein expression changes in response to pathway activation.

    Conclusions:

    • Beta-galactosidase complementation provides a versatile platform for high-throughput screening (HTS).
    • The technology is applicable to both cell-free and cell-based assays.
    • This approach offers robust and sensitive detection for drug discovery and biological research.