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Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
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Biosensor-based fragment screening using FastStep injections.

Rebecca L Rich1, John G Quinn, Tom Morton

  • 1Center for Biomolecular Interaction Analysis, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.

Analytical Biochemistry
|August 31, 2010
PubMed
Summary
This summary is machine-generated.

A new FastStep injection method for surface plasmon resonance biosensors enables reproducible analyte dilution series. This innovation streamlines kinetic studies and fragment screening by automating concentration generation and analysis.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Biotechnology

Background:

  • Surface plasmon resonance (SPR) biosensors are crucial for label-free biomolecular interaction analysis.
  • Accurate concentration control is essential for reproducible kinetic and screening assays.
  • Automating dilution series generation can improve assay efficiency and reduce manual error.

Purpose of the Study:

  • To introduce and validate a novel, automated analyte injection method called FastStep for SPR biosensors.
  • To demonstrate the reproducibility and utility of FastStep for kinetic analysis and primary screening.

Main Methods:

  • Developed the FastStep method by merging buffer and sample streams before reaction flow cells.
  • Utilized sucrose injections to validate reproducible concentration gradient generation.
  • Created analysis software to automatically define analyte concentration during association phase.
  • Compared FastStep with standard injections for kinetic studies (ADP-kinase) and compound screening (carbonic anhydrase II inhibitors).

Main Results:

  • FastStep reproducibly generated 5- or 7-point dilution series from a single sample.
  • Analysis software accurately determined analyte concentrations using sucrose response data.
  • FastStep yielded comparable results to standard injections for kinetic and screening assays.
  • Demonstrated FastStep's applicability for primary fragment library screening.

Conclusions:

  • FastStep is a robust and reproducible method for automated analyte dilution series generation in SPR biosensing.
  • This method enhances efficiency for kinetic studies and fragment-based screening.
  • FastStep simplifies assay setup and data analysis for SPR applications.