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A model for thyroid hormone--receptor interactions.

T A Andrea, S W Dietrich, W J Murray

    Journal of Medicinal Chemistry
    |March 1, 1979
    PubMed
    Summary
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    Thyroid hormone analogues’ electronic structure and receptor interactions were studied. Key findings show that specific substituent orientations and acidity enhance binding and biological activity, correlating with conformational free energy.

    Area of Science:

    • Biochemistry
    • Computational Chemistry
    • Molecular Biology

    Background:

    • Thyroid hormones regulate metabolism and development.
    • Understanding hormone-receptor interactions is crucial for drug design.
    • Electronic structure influences biological activity.

    Purpose of the Study:

    • To investigate the electronic structure of thyroid hormones and analogues.
    • To model hormone-receptor interactions.
    • To identify structural features enhancing biological activity.

    Main Methods:

    • Theoretical electronic structure calculations.
    • Modeling of hormone-nuclear receptor interactions.

    Main Results:

    • The 4'-OH group acts as a hydrogen bond donor to the nuclear receptor.

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  • Optimal 4'-OH orientation (trans to 3' substituent) and increased acidity enhance binding and activity.
  • A correlation exists between aromatic ring conformational free energy and biological activity.
  • Conclusions:

    • Structural and electronic properties of thyroid hormone analogues significantly impact receptor binding and biological function.
    • Computational modeling provides insights into structure-activity relationships.
    • Findings support targeted design of more potent thyroid hormone analogues.