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Effects of cryoprotectants on enzyme structure.

A L Fink

    Cryobiology
    |February 1, 1986
    PubMed
    Summary

    Protein stability is uniquely affected by organic cosolvents, with hydrophobicity being key. Each protein-cosolvent system requires specific analysis due to complex interactions influencing protein structure and function.

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    Area of Science:

    • Biochemistry
    • Protein Chemistry
    • Physical Chemistry

    Background:

    • Organic cosolvents interact with proteins, influencing their stability and properties.
    • Understanding these interactions is crucial for various applications, including cryoprotection.

    Purpose of the Study:

    • To investigate the effects of organic cosolvents on protein stability and enzyme properties.
    • To elucidate the factors determining protein-cosolvent interactions and their consequences.

    Main Methods:

    • Classification of cosolvents based on interaction with protein surfaces.
    • Analysis of thermodynamic stability changes in protein-cosolvent systems.
    • Examination of structural and catalytic properties of enzymes in the presence of cosolvents.

    Main Results:

    • Protein-cosolvent systems are unique, defying generalized predictions.
    • Cosolvents can be accommodated by preferential exclusion, structural changes, or aggregation.
    • Relative cosolvent hydrophobicity is a major determinant of enzyme stability and properties.
    • Protein surface characteristics significantly influence solvent-protein interactions.

    Conclusions:

    • The effect of cosolvents on protein stability and enzyme function is highly specific.
    • Hydrophobicity and surface group interactions dictate the outcome of protein-cosolvent systems.
    • This understanding can be applied to optimize cryoprotectant strategies for cells.

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