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[Cloning and expression of immunoadjuvant molecule--CTB gene]
Tao Wang1, Jianping Chen, Lei Zhang
1Department of Parasitology, West China Medical Center, Sichuan University, Chengdu 610041, China.
Summary
Researchers successfully cloned the cholera toxin subunit B gene from Vibrio cholerae. This achievement enabled the expression of a 12 KD protein in a prokaryotic cell strain, paving the way for further research.
Area of Science:
- Molecular Biology
- Microbiology
- Biotechnology
Background:
- Cholera toxin subunit B (CTB) is crucial for Vibrio cholerae pathogenesis.
- Efficient expression systems are needed for studying CTB and developing interventions.
Purpose of the Study:
- To clone the cholera toxin subunit B gene from Vibrio cholerae.
- To construct a recombinant plasmid for expressing CTB in a prokaryotic system.
- To verify the successful expression of the CTB protein.
Main Methods:
- Polymerase chain reaction (PCR) was used to amplify the CTB gene.
- Recombinant plasmid pCTB was constructed and transformed into E. coli JM109.
- Identification and verification involved restriction enzyme analysis, PCR, DNA sequencing, SDS-PAGE, and Western blot.
Main Results:
- The cholera toxin subunit B gene (376 bp) was successfully amplified from Vibrio cholerae.
- The recombinant plasmid pCTB was constructed and confirmed.
- Successful expression of a 12 KD protein, corresponding to CTB, was achieved in E. coli JM109.
Conclusions:
- The study successfully established a prokaryotic expression system for Vibrio cholerae cholera toxin subunit B.
- This system provides a foundation for further investigations into CTB function and potential therapeutic targets.