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Modified method for production and purification of Staphylococcus aureus enterotoxin B
Applied and Environmental Microbiology
|March 1, 1983
Summary
This study details the production and purification of Staphylococcus aureus enterotoxin B (SEB). Researchers achieved a high yield of SEB, a potent bacterial toxin, using a specific culture medium and advanced purification techniques.
Area of Science:
- Microbiology
- Biochemistry
- Immunology
Background:
- Staphylococcus aureus is a common pathogen.
- Enterotoxins produced by S. aureus can cause food poisoning.
- Efficient production and purification of these toxins are crucial for research.
Purpose of the Study:
- To establish a method for producing Staphylococcus aureus enterotoxin B (SEB).
- To purify SEB to a homogenous state for further study.
- To characterize the physical properties of purified SEB.
Main Methods:
- Culturing S. aureus S-6 in a medium with 4% bio-trypcase and 1% yeast extract.
- Purification using Biorex 70 chromatography, isoelectric focusing, and Sephadex G-100 gel filtration.
- Analysis of purified protein by gel electrophoresis.
Main Results:
- Achieved an estimated yield of 200 micrograms of SEB per ml of culture supernatant.
- Purified SEB demonstrated homogeneity.
- Determined the isoionic point to be pH 8.55 and molecular weight to be 29,000 Da.
Conclusions:
- A reliable method for SEB production and purification was developed.
- The characterized SEB is suitable for further research into its biological functions and potential applications.
- This work contributes to the understanding of staphylococcal toxins.