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Key Documents

S0827

Sigma-Aldrich

Streptokinase C from Streptococcus sp.

buffered aqueous solution, ≥50,000 units/mg protein

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About This Item

Enzyme Commission number:
UNSPSC Code:
12352204
NACRES:
NA.54

recombinant

expressed in E. coli

Quality Level

form

buffered aqueous solution

specific activity

≥50,000 units/mg protein

storage temp.

−20°C

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Application

Streptokinase (SK) is commonly used as a thrombolytic agent in the therapy of ischemic stroke. This therapy carries the important risk of intracerebral hemorrhage. Streptokinase is also used in the treatment of complicated parapneumonic effusions and empyema where adverse reactions, allergic type, are rare. The product has been used to measure SK activity in brain heart infusion culture supernatant fluids of the various wild-type and mutant strains of Streptococcus dysgalactiae subsp. Equisimilis.

Biochem/physiol Actions

Streptokinase C is an extracellular enzyme that is produced by various strains of β-hemolytic streptococci. It is a single-chain polypeptide that exerts its fibrinolytic action indirectly by activating the circulatory plasminogen.

Unit Definition

One unit will liquify a standard clot of fibrinogen, plasminogen, and thrombin at pH 7.5 at 37 °C in 10 min.

Physical form

Supplied as a frozen solution containing 60 mM phosphate buffer and 0.6 M glutamate. Albumin-free

Storage Class Code

10 - Combustible liquids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Kerstin Steiner et al.
Infection and immunity, 70(7), 3627-3636 (2002-06-18)
Synthesis of the plasminogen activator streptokinase (SK) by group A streptococci (GAS) has recently been shown to be subject to control by two two-component regulators, covRS (or csrRS) and fasBCA. In independent studies, response regulator CovR proved to act as

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