Affiliation:
1. Laboratory of Molecular Microbial Science, Institute for Chemical Research, Kyoto University, Kyoto, Japan
Abstract
ABSTRACT
A low-temperature protein expression system is useful for the production of thermolabile proteins. We previously developed a system that enables constitutive protein production at low temperatures, using the psychrotrophic bacterium Shewanella livingstonensis Ac10 as the host. To increase the utility of this system, in the present study, we introduced a repressible promoter of the trp operon of this bacterium into the system. When ß-lactamase was produced under the control of this promoter at 18°C and 4°C, the yields were 75 and 33 mg/L-culture, respectively, in the absence of l-Trp, and the yields were decreased by 72% and 77%, respectively, in the presence of l-Trp. We also found that 3-indoleacrylic acid, a competitive inhibitor of the Escherichia coli trp repressor, increased the expression of the reporter gene. This repressible gene expression system would be useful for regulatable recombinant protein production at low temperatures.
Funder
Japan Society for the Promotion of Science
Publisher
Oxford University Press (OUP)
Subject
Organic Chemistry,Molecular Biology,Applied Microbiology and Biotechnology,General Medicine,Biochemistry,Analytical Chemistry,Biotechnology
Cited by
4 articles.
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