Journal
BIOTECHNOLOGY ADVANCES
Volume 24, Issue 3, Pages 285-295Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.biotechadv.2005.11.001
Keywords
lactic acid bacteria; NICE; expression system; food-grade
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Lactic acid bacteria are widely used in industrial fermentation. The potential use of these bacteria as homologous and heterologous protein expression hosts has been investigated extensively. The NIsin-Controlled gene Expression system (the NICE system) is an efficient and promising gene expression system based on the autoregulation mechanism of nisin biosynthesis in the Lactococcus lactis. In the NICE system, the membrane-located histidine kinase NisK senses the inducing signal nisin and autophosphorylates, then transfers phosphorous group to intracellular response regulator protein NisR which activates nisA promoter to express the downstream gene(s). The NICE system allows regulated overproduction of a variety of interest proteins by several Gram-positive bacteria, especially L. lactis. The essential elements for system construction, its application for expression of some biotechnologically important proteins and further improvements of this system are discussed. (c) 2005 Elsevier Inc. All rights reserved.
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