Physiologic concentrations of glucose regulate fatty acid synthase activity in HepG2 cells by mediating fatty acid synthase mRNA stability.

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Physiologic concentrations of glucose regulate fatty acid synthase activity in HepG2 cells by mediating fatty acid synthase mRNA stability.

Carbohydrate feeding of animals results in striking increases in hepatic fatty acid synthesis but much of this induction is presumed to be hormone mediated. To clarify the mechanisms responsible for the specific effect of carbohydrate on fatty acid synthesis, the effects of D-glucose on the expression of human fatty acid synthase (FAS) in HepG2 cells cultured in serum-free medium were studied. ...

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Introduction Fatty acid synthase (FAS) plays a central role in de novo lipogenesis in mammals and birds by catalysing the reaction in the conversion of acetyl-CoA and malonyl-CoA into palmitate. FAS activity is not known to be regulated by allosteric effectors or covalent modifications. However, FAS concentration is exquisitely sensitive to nutritional, hormonal and developmental states [ 1-31....

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Molecular Pathways: Fatty Acid Synthase.

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Suppression of fatty acid synthase promoter by polyunsaturated fatty acids.

Dietary polyunsaturated fat is known to suppress expression of fatty acid synthase (FAS), a central enzyme in de novo lipogenesis. The sterol regulatory element-binding protein (SREBP) has recently been shown to be involved in this suppression. We previously reported that the first 2.1 kb of the FAS promoter are sufficient for transcriptional induction by a high carbohydrate diet as well as sup...

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Our model of the native fatty acid synthase (FAS) depicts it as a dimer of two identical multifunctional proteins (Mr approximately 272,000) arranged in an antiparallel configuration so that the active Cys-SH of the beta-ketoacyl synthase of one subunit (where the acyl group is attached) is juxtaposed within 2 A of the pantetheinyl-SH of the second subunit (where the malonyl group is bound). Th...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 1993

ISSN: 0021-9258

DOI: 10.1016/s0021-9258(18)53133-1