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Purification and some properties of tetanolysin
Microbiology and Immunology
|January 1, 1980
Summary
Researchers purified tetanolysin, a toxin from Clostridium tetani, revealing it comprises four hemolysins differing in molecular weight and isoelectric point. This purified tetanolysin is distinct from tetanus neurotoxin and proteases.
Area of Science:
- Microbiology
- Protein Biochemistry
Background:
- Clostridium tetani produces tetanolysin, a hemolysin with potential biological activity.
- Understanding the molecular properties of tetanolysin is crucial for its study.
Purpose of the Study:
- To purify tetanolysin from Clostridium tetani.
- To characterize the molecular properties of the purified tetanolysin.
Main Methods:
- Purification involved ammonium sulfate fractionation, acetone precipitation, and gel filtration.
- Characterization utilized polyacrylamide gel electrophoresis (PAGE), SDS-PAGE, and isoelectric focusing.
Main Results:
- Purified tetanolysin showed a 1,050-fold increase in specific activity.
- SDS-PAGE revealed two protein bands (53,000 and 48,000 Da), and isoelectric focusing identified four activity peaks (pIs 6.1, 5.6, 5.3, 6.6).
- The preparation was free of tetanus neurotoxin and proteases.
Conclusions:
- Tetanolysin preparation contains multiple hemolysins differing in molecular weight and isoelectric point.
- Purified tetanolysin exhibits distinct properties compared to Cl. perfringens theta-toxin, including stronger inhibition by cholesterol.