Simultaneous consumption of glucose and fructose from sugar mixtures during batch growth of Corynebacterium glutamicum |
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| Authors: | H Dominguez M Cocaign-Bousquet N D Lindley |
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| Institution: | (1) Centre de Bioingénierie Gilbert Durand, UMR CNRS/INSA and Laboratoire Associée INRA, Institut National des Sciences Appliquées, Complexe Scientifique de Rangueil, F-31077 Toulouse cedex 4, France Tel.: (33) 5 61 55 94 89 Fax: (33) 5 61 55 94 00 e-mail: lindley@insatlse.insa-tlse.fr, FR |
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| Abstract: | Growth of Corynebacterium glutamicum on mixtures of glucose and fructose leads to simultaneous consumption of both sugars in which the uptake of each sugar is
directly related to the expression of the corresponding sugar uptake mechanism. The overall rate of sugar uptake was higher
on sugar mixtures than on either glucose or fructose alone and was similar to that observed during sucrose metabolism. The
results suggest that sugar uptake limits metabolic rates though, in the case of fructose, overflow metabolism of both lactate
and dihydroxyacetone was observed. Such products could reflect a higher flux through glycolysis rather than the pentose pathway
during catabolism of fructose.
Received: 24 October 1996 / Received revision: 10 January 1997 / Accepted: 10 January 1997 |
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