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Related Experiment Videos

Prothrombin activation by a metalloprotease from Staphylococcus aureus.

Z Wegrzynowicz, P B Heczko, G R Drapeau

    Journal of Clinical Microbiology
    |August 1, 1980
    PubMed
    Summary

    Staphylococcal metalloprotease directly activates prothrombin, forming thrombin. This activation, crucial in coagulation, is inhibited by ethylenediaminetetraacetic acid, suggesting a role in staphylocoagulase-like activity.

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    Area of Science:

    • Biochemistry
    • Microbiology

    Background:

    • Prothrombin is a key protein in the blood coagulation cascade.
    • Staphylococcal metalloprotease is an enzyme produced by Staphylococcus aureus.

    Purpose of the Study:

    • To investigate the direct activation of prothrombin by staphylococcal metalloprotease.
    • To understand the mechanism of thrombin formation induced by this enzyme.

    Main Methods:

    • Incubation of purified bovine prothrombin with purified staphylococcal metalloprotease.
    • Assay of thrombin activity using clotting time and synthetic substrate digestion (Chromozym TH).
    • Inhibition studies using ethylenediaminetetraacetic acid.

    Main Results:

    • Staphylococcal metalloprotease directly activates prothrombin to form thrombin.

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  • Thrombin generation was confirmed by clotting assays and substrate digestion.
  • The activation process was inhibited by ethylenediaminetetraacetic acid, indicating a metalloenzyme mechanism.

    • Conclusions:

    • Staphylococcal metalloprotease possesses direct prothrombin-activating properties.
    • The enzyme's activity is dependent on metal ions.
    • This enzymatic activity may contribute to the coagulase-like effects observed with certain Staphylococcus aureus strains.