Cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C) plays key roles in gluconeogenesis, glyceroneogenesis, and cataplerosis. Experiments were designed to examine the effects of endogenous lipid molecules from rat livers on the expression of PEPCK-C gene in primary rat hepatocytes. The lipid extracts prepared from livers of Zucker fatty, lean, and Wistar rats induced the expression levels of P...

The cytosolic phosphenolpyruvate carboxykinase [PEPCK; GTP:oxaloacetate carboxy-lyase (transphosphorylating), EC 4.1.1.32] gene was isolated from a rat genomic library, and a map of the methylatable sites C-C-G-G and G-C-G-C has been constructed. The extent of methylation of 18 sites in the PEPCK gene in adult liver, kidney, spleen, and heart muscle and in fetal liver has been analyzed using th...

abstract phosphoenolpyruvate carboxykinase, encoded by the pepck gene, plays an important role in gluconeogenesis. it also seems to be important in metabolism of nitrogenous compounds in developing seeds of legumes, including amides and ureides which are then transformed into amino acids, necessary for the synthesis of storage proteins. in this research, pepck gene expression in mrna level, in ...

BACKGROUND The metabolic function of PEPCK-C is not fully understood; deletion of the gene for the enzyme in mice provides an opportunity to fully assess its function. METHODS The gene for the cytosolic form of phosphoenolpyruvate carboxykinase (GTP) (EC 4.1.1.32) (PEPCK-C) was deleted in mice by homologous recombination (PEPCK-C-/- mice) and the metabolic consequences assessed. RESULTS PEP...

The cytosolic form of the phosphoenolpyruvate carboxykinase (PEPCK-C) gene is selectively expressed in several tissues, primarily in the liver, kidney, and adipose tissue. The transcription of the gene is reciprocally regulated by glucocorticoids in these tissues. It is induced in the liver and kidney but repressed in the white adipose tissue. To elucidate which adipocyte-specific transcription...

Transgenic mice, containing a chimeric gene in which the cDNA for phosphoenolpyruvate carboxykinase (GTP) (PEPCK-C) (EC 4.1.1.32) was linked to the alpha-skeletal actin gene promoter, express PEPCK-C in skeletal muscle (1-3 units/g). Breeding two founder lines together produced mice with an activity of PEPCK-C of 9 units/g of muscle (PEPCK-C(mus) mice). These mice were seven times more active i...

Insecticide resistance is an ongoing challenge in agriculture and disease vector control. Here, we demonstrate a novel strategy to attenuate resistance. We used genomics tools target fundamental energy-associated pathways identified potential “Achilles' heel” for resistance, resistance-associated protein that, upon inhibition, results substantial loss the phenotype. Specifically, compared gene ...

Jun homodimers and Fos/Jun heterodimers bind to the gene for phosphoenolpyruvate carboxykinase (GTP) (EC 4.1.1.32) (PEPCK) at three sites within the first 350 base pairs of the promoter. These include CRE-1 (-82 to -90), and P3(II) and P4 (-252 to -258 and -268 to -285, respectively). Over-expression of Jun in HepG2 cells resulted in a 10-15-fold increase in the level of transcription of a chim...

Sequences in the gene for P-enolpyruvate carboxykinase (PEPCK) which are responsible for its complex pattern of transcriptional control were determined using transgenic mice containing a chimeric PEPCK-bovine growth hormone (bGH) gene consisting of a segment of the PEPCK promoter from -460 to +73, with mutations in specific regulatory domains. A mutation in the cAMP response element (CRE) (-87 ...

It has been previously demonstrated that the CCAAT/enhancer-binding protein (C/EBP) trans-activates the gene coding for the cytosolic form of phosphoenolpyruvate carboxykinase (GTP) (EC 4.1.1.32) (PEPCK) and binds to several sites along the promoter. The additional observations that C/EBP is expressed in liver and follows the same developmental profile as PEPCK suggests that C/EBP plays an impo...