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Temperature and macromolecular structure and function.

R H Pain1

  • 1Department of Biochemistry, University of Newcastle, UK.

Symposia of the Society for Experimental Biology
|January 1, 1987
PubMed
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Macromolecular stability, crucial for cellular function, is sensitive to temperature, affecting proteins and nucleic acids. Understanding non-covalent interactions is key to predicting structural stability and function across temperatures.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Biophysics

Background:

  • Macromolecular stability is essential for cellular function and is influenced by temperature.
  • Proteins and nucleic acids exhibit sharp melting transitions, but quantitative prediction of stability remains challenging due to complex non-covalent interactions.

Purpose of the Study:

  • To explore the effects of temperature on non-covalent interactions governing macromolecular stability.
  • To understand protein and nucleic acid denaturation at high temperatures and cold inactivation.
  • To investigate the molecular basis of temperature-sensitive synthesis and enzyme activity variations.

Main Methods:

  • Analysis of temperature effects on non-covalent interactions in proteins and nucleic acids.
  • Examination of protein folding pathways and intermediate structures.

Related Experiment Videos

  • Study of enzyme kinetics and substrate-protein interactions at varying temperatures.

    • Main Results:

    • Temperature significantly impacts macromolecular structure and function through effects on non-covalent interactions.
    • Cold inactivation of proteins involves complex conformational changes.
    • Increased stability in thermophile proteins and nucleic acids is linked to altered dynamics.

    Conclusions:

    • Predicting macromolecular stability and function requires a comprehensive understanding of non-covalent interactions and their temperature dependence.
    • Protein dynamics are critical for function, necessitating a balance between stability and mobility.
    • Thermostability adjustments, seen in thermophiles, involve coordinated changes in dynamics.