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Related Experiment Video

Updated: Jun 23, 2026

Chemical Modification of the Tryptophan Residue in a Recombinant Ca2+-ATPase N-domain for Studying Tryptophan-ANS FRET
12:07

Chemical Modification of the Tryptophan Residue in a Recombinant Ca2+-ATPase N-domain for Studying Tryptophan-ANS FRET

Published on: October 9, 2021

Robust NMR screening for lead compounds using tryptophan-containing proteins.

Michal Bista1, Kaja Kowalska, Weronika Janczyk

  • 1Max Planck Institute for Biochemistry, D-82152 Martinsried, Germany.

Journal of the American Chemical Society
|May 9, 2009
PubMed
Summary

We developed a faster NMR method, Selective Excitation-Inversion AIDA-NMR (SEI AIDA), to screen drug candidates. This technique significantly reduces protein complex analysis time for drug discovery pipelines.

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PCR Mutagenesis, Cloning, Expression, Fast Protein Purification Protocols and Crystallization of the Wild Type and Mutant Forms of Tryptophan Synthase

Published on: September 26, 2020

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Last Updated: Jun 23, 2026

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PCR Mutagenesis, Cloning, Expression, Fast Protein Purification Protocols and Crystallization of the Wild Type and Mutant Forms of Tryptophan Synthase

Published on: September 26, 2020

Area of Science:

  • Biochemistry
  • Structural Biology
  • Drug Discovery

Background:

  • NMR spectroscopy is crucial for characterizing ligand-protein binding, including weak interactions.
  • Existing NMR assays can be time-consuming and protein-intensive.
  • The Antagonist Induced Dissociation Assay-NMR (AIDA-NMR) assesses antagonist effects on protein-protein interactions.

Purpose of the Study:

  • To enhance the speed and efficiency of NMR-based drug screening.
  • To reduce the acquisition time for AIDA-NMR experiments.
  • To adapt AIDA-NMR for high-throughput screening (HTS) in drug discovery.

Main Methods:

  • Development of the Selective Excitation-Inversion AIDA-NMR (SEI AIDA) technique.
  • Selective excitation of tryptophan (N)H(epsilon) indole side chain signals in NMR.
  • Application of SEI AIDA to analyze protein-protein interactions and antagonist binding.

Main Results:

  • SEI AIDA reduces NMR experiment acquisition time by an order of magnitude compared to standard AIDA-NMR.
  • A 35 µM protein complex signal can be acquired in 2.5 minutes at 600 MHz.
  • The method maintains the ability to characterize antagonist interactions and their mechanisms.

Conclusions:

  • SEI AIDA significantly accelerates NMR-based drug screening.
  • This method is suitable for high-throughput screening pipelines.
  • SEI AIDA offers a more efficient approach for studying protein-protein interactions and identifying drug candidates.