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Related Experiment Video

Updated: Oct 19, 2025

Quantitative FRET F&#246;rster Resonance Energy Transfer Analysis for SENP1 Protease Kinetics Determination
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Dipolar coupling-based electron paramagnetic resonance method for protease enzymatic characterization and inhibitor

Lu Yu1, Aokun Liu1,2, Bingbo Zhang3

  • 1The Anhui Provincial Key Laboratory of High Field Magnetic Resonance Image, High Magnetic Field Laboratory, Chinese Academy of Science, Hefei, Anhui 230031, P. R. China. cltian@ustc.edu.cn.

Chemical Communications (Cambridge, England)
|September 21, 2021
PubMed
Summary

We developed a novel Electron Paramagnetic Resonance (EPR) method using dual paramagnetic probes for protease activity detection and inhibitor screening. This technique offers a straightforward approach for enzymatic characterization and drug discovery.

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Area of Science:

  • Biochemistry
  • Spectroscopy
  • Drug Discovery

Background:

  • Protease activity is crucial in biological processes and disease.
  • Accurate characterization and inhibitor screening are vital for drug development.

Purpose of the Study:

  • To introduce a novel Electron Paramagnetic Resonance (EPR) based method.
  • To enable protease enzymatic characterization and inhibitor screening.

Main Methods:

  • Utilized dual paramagnetically-labeled probes (nitroxide spin probe and Gd3+ ion).
  • Probes flank a specific peptide substrate for protease cleavage.
  • EPR spectroscopy detects changes in dipolar coupling upon cleavage.

Main Results:

  • Demonstrated a straightforward and convenient method for protease activity detection.
  • EPR signal modulation directly correlates with protease cleavage.
  • Successfully performed time-course monitoring for quantitative kinetic assessment.

Conclusions:

  • The EPR-based method provides a direct quantitative assessment of protease activity.
  • The method is effective for screening protease inhibitors.
  • This technique holds significant potential for drug discovery studies.