ISSN:
0006-3592
Keywords:
Escherichia coli
;
protein production, recombinant
;
glucose uptake
;
acetate excretion
;
Chemistry
;
Biochemistry and Biotechnology
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Reduction of acetate excretion using a modified cellular glucose uptake rate was examined. An Escherichia coli strain bearing a mutationin ptsG, a gene encoding enzyme II in glucose phosphotransferase system (PTS), was constructed and characterized. The growth rate of the mutant strain was slower than its parent in glucose defined medium, butwas not affected in complex medium. Experimental results using this mutant strain showed a significant improvement in culture performance in simple batch cultivations due to reduced acetate excretion through the modified glucose uptake. Both biomass and recombinant protein productivity were increased by more than 50% with the ptsG mutant when compared to the parent strain. Recombinant protein productivity by the newly constructed strain at a level of more than 1.6 g/L was attained consistently in a simple batch bioreactor. © 1994 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/bit.260440811
