Glucokinase

To gain better insight into the insulin secretory activity of fetalbcells in response to glucose, the expression of glucose transporter 2 (GLUT-2), glucokinase and mitochondrial glycerol phosphate dehydrogenase (mGDH) were studied. Expression ofGLUT-2mRNA and protein in pancreatic islets and liver was signi®cantly lower in fetal and suckling rats than in adult rats.

9p research12 29-04-2013 47 4   Download

Pharmacological activation or overexpression of glucokinase in hepatocytes stimulates glucose phosphorylation, glycolysis and glycogen synthesis. We used an inhibitor of glucose 6-phosphate (Glc6P) hydrolysis, namely the chlorogenic derivative, 1-[2-(4-chloro-phenyl)-cyclopropylmethoxy]-3, 4-di-hydroxy-5-(3-imidazo[4,5-b]pyridin-1-yl-3-phenyl-acryloyloxy)-cyclohexane-

11p dell39 27-03-2013 51 4   Download

In several archaea of the Euryarchaeota, the glycolytic flux proceeds through a modified version of the Embden–Meyerhof pathway, where the phosphofructokinase and glucokinase enzymes use ADP as the phosphoryl donor. These enzymes are homologous to each other. In the hyperthermo-philic methanogenic archaeon

12p galaxyss3 07-03-2013 42 2   Download

a-d-Glucose activates glucokinase (EC 2.7.1.1) on its binding to the active site by inducing a global hysteretic conformational change. Using intrinsic tryptophan fluorescence as a probe on the a-d-glucose induced conforma-tional changes in the pancreatic isoform 1 of human glucokinase, key resi-dues involved in the process were identified by site-directed mutagenesis.

15p media19 06-03-2013 44 4   Download

Glucokinase (GK) is the central player in glucose-stimulated insulin release from pancreatic b-cells, and catalytic activation by a-D-glucose binding has a key regulatory function. Whereas the mechanism of this activation is well understood, on the basis of crystal structures of human GK, there are no similar structural data on ATP binding to the ligand-free enzyme and how it affects its conformation.

15p cosis54 05-01-2013 46 4   Download