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Related Experiment Video

Updated: Feb 10, 2026

Spin Saturation Transfer Difference NMR SSTD NMR: A New Tool to Obtain Kinetic Parameters of Chemical Exchange Processes
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Multiple frequency saturation pulses reduce CEST acquisition time for quantifying conformational exchange in

Maureen Leninger1, William M Marsiglia1, Alexej Jerschow1

  • 1Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003, USA.

Journal of Biomolecular NMR
|May 26, 2018
PubMed
Summary

This study introduces multiple frequency chemical exchange saturation transfer (MF-CEST), a faster method for Nuclear Magnetic Resonance (NMR) experiments. MF-CEST significantly reduces data collection time for probing protein and nucleic acid dynamics.

Keywords:
CESTFast data acquisitionProteinsSensitivity enhancementSolution NMR

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Area of Science:

  • Biophysics
  • Structural Biology
  • Nuclear Magnetic Resonance (NMR) Spectroscopy

Background:

  • Conformational exchange is crucial for protein function, including catalysis, allostery, and folding.
  • Nuclear Magnetic Resonance (NMR) experiments, particularly Chemical Exchange Saturation Transfer (CEST), are used to study dynamics from milliseconds to seconds.
  • Standard CEST experiments involve time-consuming acquisition of multiple 2D spectra, each using a single saturation frequency.

Purpose of the Study:

  • To develop and validate a method for accelerating the acquisition of CEST experiments.
  • To reduce the overall time required for collecting CEST data used in studying biomolecular dynamics.

Main Methods:

  • Introduction of a multiple frequency saturation pulse (MF-CEST) technique.
  • MF-CEST enables parallel data collection instead of sequential acquisition.
  • Application of MF-CEST to 13C methyl and 15N backbone datasets on SH2 domain and EmrE protein models.

Main Results:

  • MF-CEST decreases total acquisition time by an integer factor corresponding to the number of frequencies used.
  • Demonstrated applicability of MF-CEST on model protein systems (SH2 domain, EmrE).
  • Identified a potential drawback for backbone 15N experiments with large chemical shift differences (>8 ppm), which is not an issue for methyl group MF-CEST.

Conclusions:

  • MF-CEST offers a significant acceleration of CEST experiment acquisition times.
  • This method is broadly applicable to proteins and nucleic acids, with specific advantages for methyl group studies.
  • MF-CEST enhances the efficiency of studying millisecond-to-second timescale dynamics in biomolecules.