Related Experiment Videos
Purification and properties of a toxin isolated from Mortierella wolfii
Abstract:
A substance toxic for mice has been extracted from the washed mycelia of Mortierella wolfii. This toxin could also be demonstrated in culture fluids after spontaneous autolysis of the fungal hyphae. Purification of the toxin was carried out using Sephadex chromatography (G-200, G-50) and resulted in a single band on sodium dodecyl sulfate polyacrylamide gels. Properties of the toxin included heat lability at 60 C, trypsin sensitivity, activity over a wide pH range, and a molecular weight of 23,600. The mean lethal dose for 16-week-old male mice was 3.3 mug of protein.
Insights
A toxic substance from Mortierella wolfii was purified and characterized. This fungal toxin is heat-labile and has a molecular weight of 23,600, proving lethal to mice.
Area of Science:
- Mycology
- Toxicology
- Biochemistry
Background:
- Mortierella wolfii is a fungus known to cause disease.
- Understanding fungal toxins is crucial for disease management.
Purpose of the Study:
- To extract and purify a toxic substance from Mortierella wolfii.
- To characterize the biochemical properties of the isolated toxin.
Main Methods:
- Extraction of toxin from fungal mycelia and culture fluids.
- Purification using Sephadex chromatography (G-200, G-50).
- Characterization by SDS-PAGE, heat, pH, and trypsin sensitivity assays.
Main Results:
- A single toxic protein band was isolated.
- The toxin is heat-labile (at 60°C) and trypsin-sensitive.
- Molecular weight was determined to be 23,600, with activity across a wide pH range.
- The mean lethal dose (LD50) in mice was 3.3 µg of protein.
Conclusions:
- A potent toxin produced by Mortierella wolfii has been purified and characterized.
- The toxin's properties suggest it is a protein.
- Further research is warranted to understand its role in pathogenesis.