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Related Experiment Videos

Iron oxidation in Mops buffer. Effect of phosphorus containing compounds.

B Tadolini1, A M Sechi

  • 1Institute of Biological Chemistry, University of Bologna, Italy.

Free Radical Research Communications
|January 1, 1987
PubMed
Summary

Phosphorus compounds significantly alter iron (Fe2+) oxidation in Mops buffer, increasing lag time and slowing reaction rates. This impacts reactive oxygen species production in biological systems.

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Area of Science:

  • Biochemistry
  • Environmental Chemistry

Background:

  • Iron (Fe2+) autoxidation is a critical process influencing redox reactions.
  • Mops buffer is commonly used in biochemical studies, and its interaction with iron requires understanding.
  • Phosphorus compounds are ubiquitous and can potentially influence biological redox processes.

Purpose of the Study:

  • To investigate the effect of phosphorus-containing compounds on Fe2+ autoxidation in Mops buffer.
  • To elucidate the mechanism by which phosphorus compounds influence Fe2+ oxidation kinetics.
  • To assess the implications of these findings for in vitro and in vivo systems.

Main Methods:

  • Studied Fe2+ autoxidation in Mops buffer under various conditions.
  • Introduced substoichiometric concentrations of EDTA, H2O2, and Fe3+.

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  • Assessed the impact of different phosphorus-containing compounds on oxidation rates and lag phases.

    • Main Results:

    • Phosphorus compounds significantly increased the lag phase and decreased the rate of Fe2+ autoxidation in Mops buffer.
    • The inhibitory effect varied among different phosphorus compounds, influenced by the entire molecule.
    • A proposed mechanism involves phosphorus compounds binding Fe3+, reducing its catalytic effect on Fe2+ oxidation.

    Conclusions:

    • Phosphorus compounds modulate Fe2+ autoxidation pathways in Mops buffer.
    • The interaction suggests a potential shift between oxidation pathways.
    • In vitro and in vivo presence of phosphorus compounds may alter Fe2+ autoxidation and subsequent reactive oxygen species generation.