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Related Experiment Videos

Streptokinase--biochemistry and clinical application.

K N Reddy1

  • 1Department of Biochemistry, University of Southern California School of Medicine, Los Angeles.

Enzyme
|January 1, 1988
PubMed
Summary

Streptokinase indirectly activates plasminogen to plasmin by forming complexes, not through enzymatic action. This process is species-selective, highlighting a key characteristic of streptokinase

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Enzymology

Background:

  • Plasminogen activation to plasmin involves enzymatic cleavage of a peptide bond.
  • Streptokinase is a bacterial protein, not a direct enzyme.

Purpose of the Study:

  • To elucidate the mechanism of streptokinase-mediated plasminogen activation.
  • To investigate the nature of streptokinase's interaction with plasminogen and plasmin.

Main Methods:

  • Biochemical assays to study protein interactions.
  • Analysis of complex formation between streptokinase, plasminogen, and plasmin.
  • Investigation of species selectivity in activation.

Main Results:

  • Streptokinase does not directly cleave plasminogen.
  • Streptokinase forms stoichiometric complexes with plasminogen and plasmin.
  • These complexes facilitate the conversion of plasminogen to plasmin.
  • Streptokinase exhibits species selectivity in its action.

Conclusions:

  • Streptokinase's mechanism of plasminogen activation is indirect, relying on complex formation.
  • The species selectivity of streptokinase is an important consideration for its therapeutic applications.

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