Related Experiment Videos
Colicin V can be produced by lactic acid bacteria
J K McCormick1, T R Klaenhammer, M E Stiles
1Department of Biological Sciences, University of Alberta, Edmonton, Canada.
Letters in Applied Microbiology
|August 5, 1999
Summary
Colicin V, a bacterial toxin, can be expressed in lactic acid bacteria by replacing its leader peptide. This advance offers a new model for heterologous expression of antibacterial peptides.
Area of Science:
- Microbiology
- Molecular Biology
- Bacteriocin Research
Background:
- Colicin V is a proteinaceous toxin from Enterobacteriaceae, classified as a class II bacteriocin.
- Its export relies on specific ATP-binding cassette (ABC) secretion proteins recognizing a double-glycine leader peptide.
Purpose of the Study:
- To investigate the heterologous expression of Colicin V in lactic acid bacteria.
- To establish a model system for expressing other small bacteriocins.
Main Methods:
- Colicin V leader peptide was replaced with the signal peptide from divergicin A.
- Expression of the modified colicin V was achieved in lactic acid bacteria.
Main Results:
- Successful expression of Colicin V in lactic acid bacteria was demonstrated.
- The engineered system facilitated the production of a Gram-negative active bacteriocin in a Gram-positive host.
Conclusions:
- The study provides a viable system for heterologous expression of small bacteriocins.
- This model can be applied to express other antibacterial peptides from lactic acid bacteria for potential therapeutic applications.