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. 1990 Aug 3;249(4968):533-7.
doi: 10.1126/science.2166335.

Identification of a sequence in the PEPCK gene that mediates a negative effect of insulin on transcription

R M O'Brien  1 , P C Lucas, C D Forest, M A Magnuson, D K Granner
Affiliations

Identification of a sequence in the PEPCK gene that mediates a negative effect of insulin on transcription

R M O'Brien et al. Science. .

Abstract

Phosphoenolpyruvate carboxykinase (PEPCK) governs the rate-limiting step in gluconeogenesis. Glucocorticoids and adenosine 3',5'-monophosphate (cAMP) increase PEPCK gene transcription and gluconeogenesis, whereas insulin has the opposite effect. Insulin is dominant, since it prevents cAMP and glucocorticoid-stimulated transcription. Glucocorticoid and cAMP response elements have been located in the PEPCK gene and now a 15-base pair insulin-responsive sequence (IRS) is described. Evidence for a binding activity that recognizes this sequence is presented.

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