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Regulation of gene expression by glucose

Published online by Cambridge University Press:  28 February 2007

P. Ferré
P. Ferré*
Affiliation:
U465 INSERM, Centre Biomédical des Cordeliers, 15 rue de L′Ecole de Médecine, 75270 Paris Cedex 06, France
*
Corresponding Author: Dr P. Ferré, fax +33 1 40 51 85 86, email pferre@planete.net
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Abstract

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Fatty acid synthase (EC 2.3.1.85) is an enzyme involved in the lipogenic pathway allowing fatty acid synthesis from glucose. Glucose up-regulates the transcription of the fatty acid synthase gene in both adipocytes and hepatocytes, with insulin having only an indirect role. The signal metabolite could be glucose-6-phosphate rather than glucose itself. The glucose response element of the fatty acid synthase gene has not yet been precisely identified, although a −2 kb region of the fatty acid synthase promoter is sufficient to confer nutritional responsiveness to a reporter gene. ADD1/SREBP1, a b-HLH-LZ transcription factor belonging to the sterol regulatory element-binding protein family might be involved in the transduction of the glucose effect. Finally, the stimulatory effect of glucose on the expression of the fatty acid synthase gene is inhibited by the activation of AMP-activated protein kinase. Interestingly enough, AMP-activated protein kinase is structurally and functionally related to the yeast SNF1 protein kinase complex which is essential for the transcriptional activation of glucose-repressed genes in Saccharomyces cerevisiae.

Keywords

GlucoseGene regulationFatty acid synthase
Type
Symposium on ‘Functionality of nutrients and gene expression’
Information
Proceedings of the Nutrition Society , Volume 58 , Issue 3 , August 1999 , pp. 621 - 623
Copyright
Copyright © The Nutrition Society 1999

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