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Related Experiment Videos

Thrombosis as a conformational disease.

Javier Corral1, Vicente Vicente, Robin W Carrell

  • 1Universidad de Murcia/Centro Regional de Hemodonación, Spain. jcc@um.es

Haematologica
|February 16, 2005
PubMed
Summary

Conformational diseases arise from protein instability, leading to aggregation. Specific antithrombin mutations cause severe thrombosis by triggering sudden, inactivating conformational changes.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Genetics

Background:

  • Conformational diseases are linked to protein instability, aggregation, and inclusion body formation.
  • The serpin family, including alpha-1-antitrypsin and antithrombin, exemplifies these structural changes.
  • Mutations in alpha-1-antitrypsin cause liver cirrhosis due to intracellular polymerization.

Purpose of the Study:

  • To investigate how conformational changes in antithrombin lead to inactivation and thrombosis.
  • To identify specific antithrombin mutations associated with altered protein structure and thrombotic risk.

Main Methods:

  • Analysis of thirteen missense mutations in antithrombin.
  • Correlation of specific mutations with observed oligomer formation or conversion to an inactive latent form.
  • Epidemiological and clinical data linking variant antithrombins to thrombosis risk.

Main Results:

  • Thirteen distinct antithrombin mutations were identified.
  • These mutations result in either antithrombin oligomer formation or conversion to an inactive latent state.
  • Individuals with these variant antithrombins exhibit an elevated risk of severe, sudden-onset thrombosis.

Conclusions:

  • Antithrombin mutations can lead to conformational instability, inactivation, and increased thrombosis risk.
  • Episodic thrombosis is likely triggered by sudden conformational transitions and loss of inhibitory activity.
  • Factors like increased body temperature (e.g., during infections) may precipitate these transitions, contributing to sporadic venous thrombosis.

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