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KMID : 0545119990090060789
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Journal of Microbiology and Biotechnology
1999 Volume.9 No. 6 p.789 ~ p.793
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Increased Production of Recombinant Protein by Escherichia coli Deficient in Acetic Acid Formation
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Koo Tae-Young
Park Tai-Hyun
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Abstract
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The effect of acetic acid formation deficiency on recombinant E. coli fermentation was investigated using a mutant strain deficient in acetic acid formation. A mutant strain which does not grow under anaerobic conditions was isolated. The acetic acid production in this strain was negligible in aerobic batch fermentation. The cloned-gene expression in the mutant strain was higher than the wild-type strain. Fed-batch fermentations with controlled specific growth rates were carried out in order to compare the cloned-gene expression between the wild-type and the mutant strains. The expression decreased along with the specific growth rate in both strains. The cloned-gene expression in the mutant strain was 60% higher than in the wild-type strain at the same specific growth rate.
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