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Native Mass Spectrometry Can Effectively Predict PROTAC Efficacy.

Rebecca Beveridge1, Dirk Kessler2, Klaus Rumpel2

  • 1Research Institute of Molecular Pathology (IMP), Vienna Biocenter (VBC), Campus-Vienna-Biocenter 1, 1030 Vienna, Austria.

ACS Central Science
|July 30, 2020
PubMed
Summary
This summary is machine-generated.

Native mass spectrometry (nMS) offers new insights into proteolysis targeting chimeras (PROTACs) by monitoring ternary complex formation. This label-free method aids in developing new PROTACs by revealing preferred E3 ligase-PROTAC-protein of interest combinations.

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Area of Science:

  • Biochemistry
  • Chemical Biology
  • Drug Discovery

Background:

  • Proteolysis targeting chimeras (PROTACs) are bifunctional molecules that induce targeted protein degradation.
  • PROTAC development is complex due to intricate binary and ternary interactions between E3 ligases, PROTACs, and proteins of interest (POIs).

Purpose of the Study:

  • To demonstrate the utility of native mass spectrometry (nMS) for studying PROTAC-mediated interactions.
  • To provide novel insights into the formation of ternary E3-PROTAC-POI complexes.

Main Methods:

  • Utilized native mass spectrometry (nMS), a label-free technique.
  • Monitored the formation of ternary E3-PROTAC-POI complexes and intermediate species.
  • Performed competition experiments with multiple substrate proteins.

Main Results:

  • nMS successfully monitored ternary E3-PROTAC-POI complex formation and detected intermediate species in a single experiment.
  • The method revealed preferentially formed E3-PROTAC-POI combinations in competition assays.
  • Demonstrated nMS as a valuable tool for understanding PROTAC mechanisms.

Conclusions:

  • Native mass spectrometry provides significant insights into PROTAC-mediated protein interactions.
  • nMS is suitable for high-throughput screening during PROTAC development.
  • This technique can accelerate the discovery of novel PROTACs.