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Protein engineering of lantibiotics
O P Kuipers1, G Bierbaum, B Ottenwälder
1Department of Biophysical Chemistry, Netherlands Institute for Dairy Research.
Antonie Van Leeuwenhoek
|February 1, 1996
Summary
Protein engineering of lantibiotics is advancing, enabling the study of these modified peptides. Site-directed mutants provide insights into biosynthesis and antimicrobial activity for improved drug design.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- Protein engineering is a mature field for enzymes and structural proteins.
- Engineering of posttranslationally modified peptides, like lantibiotics, is an emerging area.
- Lantibiotic engineering is complex due to the need for specialized expression systems and modification prerequisites.
Purpose of the Study:
- To develop expression systems for key lantibiotic structural genes (nisin A, nisin Z, gallidermin, epidermin, Pep5).
- To generate and characterize site-directed mutants of these lantibiotics.
- To gain insights into lantibiotic biosynthesis, structure-function relationships, and antimicrobial mechanisms.
Main Methods:
- Development of expression systems for lantibiotic structural genes.
- Site-directed mutagenesis of lantibiotic genes.
- Characterization of produced lantibiotic mutants.
Main Results:
- Successful development of expression systems for nisin A, nisin Z, gallidermin, epidermin, and Pep5.
- Production of site-directed lantibiotic mutants.
- Identification of key regions essential for antimicrobial activity and insights into biosynthetic requirements.
Conclusions:
- Lantibiotic engineering is feasible and provides valuable data on biosynthesis and activity.
- Understanding these factors facilitates rational design of novel lantibiotics.
- Mutants aid in elucidating lantibiotic mode of action and developing targeted antimicrobial agents.