Related Experiment Videos
The nisin-controlled gene expression system: construction, application and improvements.
Xu Xia Zhou1, Wei Fen Li, Guo Xia Ma
1Department of Chemistry, Zhejiang University, the Laboratory of Natural and BioChemistry, Hangzhou, 310027, China.
Biotechnology Advances
|December 29, 2005
Summary
The Nisin-Controlled Gene Expression (NICE) system enables efficient protein production in lactic acid bacteria like Lactococcus lactis. This system utilizes nisin biosynthesis for regulated gene expression, offering a promising tool for biotechnology.
Area of Science:
- Microbiology
- Molecular Biology
- Biotechnology
Background:
- Lactic acid bacteria are crucial for industrial fermentation and are explored as protein expression hosts.
- The Nisin-Controlled Gene Expression (NICE) system leverages nisin biosynthesis in Lactococcus lactis for controlled protein production.
Purpose of the Study:
- To discuss the essential elements for constructing the NICE system.
- To review the application of the NICE system for expressing important biotechnological proteins.
- To explore potential improvements for the NICE system.
Main Methods:
- The NICE system relies on the membrane-located histidine kinase NisK sensing nisin.
- NisK autophosphorylates and transfers a phosphate group to the response regulator NisR.
- NisR activates the nisA promoter to drive the expression of downstream genes.
Main Results:
- The NICE system facilitates regulated overproduction of various proteins.
- It is particularly effective in Gram-positive bacteria, especially Lactococcus lactis.
- The system's components and applications in expressing biotechnologically relevant proteins are detailed.
Conclusions:
- The NICE system is an efficient and versatile platform for heterologous protein expression in lactic acid bacteria.
- Further improvements can enhance its utility in industrial biotechnology applications.
- This system provides a robust method for controlled protein synthesis in microbial hosts.