[Fibrinolytic and thrombolytic properties of thiol-dependent serine proteinase from Thermoactinomyces vulgaris in vitro].

Fibrinolytic and thrombolytic properties of the subtilisin-like thiol-dependent serine proteinase were studied. At concentrations from 50 to 4000 micrograms/ml the enzyme causes lysis of fibrin plates and activates plasminogen. At concentrations above 100 micrograms/ml it shows a pronounced thrombolytic effect on the clots formed in vitro from both plasma and human and rat blood. Plasma inhibitors partly inactivate the thiol-dependent serine proteinase. The enzyme hydrolyses also fibrinogen, thrombin, plasmin and plasminogen.