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Related Experiment Videos

Structure-function relationships of the thrombin-thrombomodulin interaction

J E Sadler1, S R Lentz, J P Sheehan

  • 1Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, Mo.

Haemostasis
|March 1, 1993
PubMed
Summary
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Thrombomodulin, an anticoagulant protein, modulates thrombin activity to prevent clotting and activate protein C. Its structure-function is key to understanding bleeding and thrombotic disorders.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Hematology

Background:

  • Thrombomodulin is a crucial anticoagulant protein cofactor.
  • It modulates thrombin's substrate specificity, enhancing protein C activation.
  • Understanding its interaction with thrombin is vital for hemostasis research.

Purpose of the Study:

  • To elucidate the structure-function relationships of the thrombin-thrombomodulin interaction.
  • To identify key domains and modifications of thrombomodulin involved in its anticoagulant functions.

Main Methods:

  • Recombinant DNA technology
  • Protein chemistry methods
  • Analysis of thrombomodulin domains and chondroitin sulfate modification

Main Results:

Related Experiment Videos

  • Thrombomodulin binds thrombin at an anion-binding exosite, inhibiting fibrinogen, factor V, and platelet thrombin receptor cleavage.
  • EGF-like domains 5 and 6 form the major thrombin binding site.
  • EGF-like domain 4 is essential for protein C activation; chondroitin sulfate confers direct anticoagulant activity.

Conclusions:

  • Thrombomodulin's interaction with thrombin is multifaceted, involving specific domains and modifications.
  • Understanding these interactions offers potential therapeutic strategies for bleeding and thrombotic disorders.