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Relation between enzymic catalysis and energy coupling.

M Fry, G A Blondin, D E Green

    Proceedings of the National Academy of Sciences of the United States of America
    |October 1, 1980
    PubMed
    Summary
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    Enzyme catalysis and energy coupling share fundamental principles like bond polarization and charge separation. Models for energy coupling must adhere to enzyme catalysis principles for accurate representation.

    Area of Science:

    • Biochemistry
    • Bioenergetics
    • Enzymology

    Background:

    • Enzyme catalysis and biological energy coupling are crucial cellular processes.
    • Hexokinase and mitochondrial electron-transfer complexes serve as key models for these processes.

    Purpose of the Study:

    • To compare the underlying principles of enzyme catalysis and energy coupling.
    • To establish constraints for energy coupling models based on enzyme catalysis.

    Main Methods:

    • Comparative analysis of hexokinase (enzyme catalysis) and mitochondrial electron-transfer complexes (energy coupling).
    • Examination of common mechanistic events such as induced polarization and charge separation.

    Main Results:

    • Enzyme catalysis and energy coupling share common mechanistic steps.

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  • Induced polarization of chemical bonds is a shared event.
  • Charge separation and elimination are integral to both processes.

    • Conclusions:

    • The principles governing enzyme catalysis are applicable to energy coupling.
    • Energy coupling models must align with established principles of enzyme catalysis.
    • This provides a framework for developing more accurate bioenergetic models.