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Copper(II)-lincomycin: complexation pattern and oxidative activity.

M Jezowska-Bojczuk1, W Lesniak, W Szczepanik

  • 1Faculty of Chemistry, University of Wrocław, F. Joliot-Curie, Poland. mjb@wchuwr.chem.uni.wroc.pl

Journal of Inorganic Biochemistry
|May 26, 2001
PubMed
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This study investigated copper(II) coordination with lincomycin, finding it forms mononuclear complexes. These complexes facilitate 2′-deoxyguanosine oxidation but do not cleave double-stranded DNA.

Area of Science:

  • Coordination chemistry
  • Biophysical chemistry
  • Medicinal chemistry

Background:

  • Lincomycin, an antibiotic, has potential applications beyond its antimicrobial activity.
  • Understanding metal ion coordination is crucial for exploring novel therapeutic or diagnostic uses.

Purpose of the Study:

  • To elucidate the coordination chemistry between copper(II) and lincomycin.
  • To investigate the reactivity of copper(II)-lincomycin complexes in oxidative processes and DNA interactions.

Main Methods:

  • Potentiometry
  • UV-Vis spectroscopy
  • Circular dichroism (CD)
  • Electron paramagnetic resonance (EPR)
  • Nuclear magnetic resonance (NMR)
  • Cyclic voltammetry (CV)

Related Experiment Videos

  • Electrospray ionization mass spectrometry (ESI-MS)
  • High-performance liquid chromatography (HPLC)
  • Agarose gel electrophoresis

    • Main Results:

    • Mononuclear copper(II)-lincomycin complexes (CuL to CuH(-3)L) were identified.
    • At neutral pH, the primary species involves lincomycin coordinating Cu(II) via two nitrogen donors and a deprotonated C4 oxygen.
    • Copper(II)-lincomycin complexes effectively catalyze the oxidation of 2′-deoxyguanosine by hydrogen peroxide.
    • These complexes do not exhibit cleavage activity against double-stranded plasmid DNA.

    Conclusions:

    • Lincomycin forms stable mononuclear complexes with copper(II) involving specific donor sites.
    • The copper(II)-lincomycin complexes show potential in facilitating oxidative processes, specifically 2′-deoxyguanosine oxidation.
    • The study provides insights into the coordination behavior and reactivity of lincomycin with copper(II), highlighting its potential in redox-related biological applications without DNA cleavage activity.