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Analyzing Protein Architectures and Protein-Ligand Complexes by Integrative Structural Mass Spectrometry
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Efficiently detecting metallodrug-protein adducts: ion trap versus time-of-flight mass analyzers

Samuel M Meier1, Maria V Babak, Bernhard K Keppler

  • 1Institute of Inorganic Chemistry, University of Vienna, Waehringer Str. 42, 1090 Vienna (Austria); Translational Cancer Research Center, University of Vienna, Waehringer Str. 42, 1090 Vienna (Austria).

Chemmedchem
|March 20, 2014
PubMed

Insights

Modern mass spectrometry effectively detects anticancer metallodrugs binding to proteins. Detection efficiency for ruthenium (Ru) adducts depends on the mass analyzer and protein interaction type, influencing biological activity.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Chemical Biology

Background:

  • Mass spectrometry is crucial for studying anticancer metallodrugs and their cellular targets.
  • Understanding drug-protein interactions is key to developing effective cancer therapies.

Purpose of the Study:

  • To investigate the detection efficiency of adduct formation between antiproliferative ruthenium (arene) complexes and proteins.
  • To determine the influence of different mass analyzers in electrospray ionization (ESI) mass spectrometry on adduct detection.
  • To explore the relationship between metal-protein interaction denticity and adduct detectability.

Main Methods:

  • Utilizing modern mass spectrometry techniques, specifically electrospray ionization (ESI) mass spectrometry.
  • Analyzing adduct formation between ruthenium (arene) complexes and proteins.
  • Comparing detection efficiencies across different mass analyzers.

Main Results:

  • Detection efficiency of metal-protein adducts is dependent on the mass analyzer used.
  • The denticity of the metal-protein interaction significantly affects adduct detectability.
  • Monodentate interactions are more affected by mass analyzer design than multidentate interactions.

Conclusions:

  • Mass analyzer choice and interaction denticity are critical factors in detecting metallodrug-protein adducts.
  • These findings may impact the understanding of biological activity and metabolism of metallodrug-biomolecule adducts.
  • This research highlights the importance of mass spectrometry in metallodrug research.
Keywords:
detection efficiencyion trapmass spectrometrymetallodrugsrutheniumtime-of-flight

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