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Related Experiment Videos

Chronoregulation by asparagine deamidation.

Steven J Weintraub1, Benjamin E Deverman

  • 1Division of Urology, Department of Cell Biology and Physiology, The Siteman Cancer Center, Washington University School of Medicine, 660 South Euclid Avenue, Campus Box 8242, St. Louis, MO 63110, USA. weintraub@wustl.edu

Science'S STKE : Signal Transduction Knowledge Environment
|October 25, 2007
PubMed
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Asparagine deamidation, a natural protein modification, can alter protein function and stability. This process, influenced by protein structure, may serve as a biological timer regulating protein activity.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Protein Chemistry

Background:

  • Asparagine residues in proteins undergo spontaneous nonenzymatic deamidation to aspartate or isoaspartate.
  • This modification introduces a negative charge, alters protein structure, and can impact protein function and degradation.
  • While often linked to pathology, the widespread occurrence suggests a potential biological role.

Purpose of the Study:

  • To explore the biological significance and regulatory potential of asparagine deamidation.
  • To investigate how protein structure and cellular environment influence deamidation rates.
  • To understand the implications of deamidation for protein function, stability, and potential roles as molecular timers.

Main Methods:

  • Literature review and analysis of existing data on protein deamidation.

Related Experiment Videos

  • Bioinformatic modeling to predict deamidation rates in various proteins.
  • Examination of the impact of amino acid sequence on deamidation kinetics.

    • Main Results:

    • Deamidation half-lives vary widely, from less than a day to centuries, depending on the protein context.
    • Over 200 proteins are known to undergo significant deamidation, with hundreds more potentially affected.
    • Neighboring amino acid sequences significantly modulate deamidation rates, indicating genetic programmability.

    Conclusions:

    • Asparagine deamidation is a genetically tunable process with the potential to regulate protein function and stability.
    • The programmed rates of deamidation suggest a role as molecular timers in biological systems.
    • Further research is needed to fully elucidate the beneficial roles and regulatory mechanisms of asparagine deamidation.