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The separate liver promoter allows glucokinase to be regulated differently in hepatocytes than in the neuroendocrine cells. Neuroendocrine cells of the pancreas, gut, and brain share some common aspects of glucokinase production, regulation, and function. [30] These tissues are collectively referred to as "neuroendocrine" cells in this context.
The glucokinase regulatory protein (GKRP) also known as glucokinase (hexokinase 4) regulator (GCKR) is a protein produced in hepatocytes (liver cells). GKRP binds and moves glucokinase (GK), thereby controlling both activity and intracellular location [1] [2] of this key enzyme of glucose metabolism. [3] GKRP is a 68 kD protein of 626 amino acids.
The gene product is a regulatory protein that inhibits glucokinase in liver and pancreatic islet cells by binding non-covalently to form an inactive complex with the enzyme. This gene is considered a susceptibility gene candidate for a form of maturity onset diabetes of the young (MODY). [provided by RefSeq, Jul 2008].
Glucokinase (GK) is an enzyme that helps in the glycolytic pathway by phosphorylating glucose into glucose-6-phosphate (G6P). It is an isozyme of hexokinase and is found mainly in pancreatic β cells, but also liver, gut, and brain cells where glycolysis cause glucose-induced insulin secretion. [2]
While most steps in gluconeogenesis are the reverse of those found in glycolysis, three regulated and strongly endergonic reactions are replaced with more kinetically favorable reactions. Hexokinase / glucokinase , phosphofructokinase , and pyruvate kinase enzymes of glycolysis are replaced with glucose-6-phosphatase , fructose-1,6 ...
Glycogenesis is the process of glycogen synthesis or the process of converting glucose into glycogen in which glucose molecules are added to chains of glycogen for storage. This process is activated during rest periods following the Cori cycle , in the liver , and also activated by insulin in response to high glucose levels .
Hints and the solution for today's Wordle on Saturday, December 14.
When glucose enters a cell it is rapidly changed to glucose 6-phosphate, by hexokinase or glucokinase.The glucose cycle can occur in liver cells due to a liver specific enzyme glucose-6-phosphatase, which catalyse the dephosphorylation of glucose 6-phosphate back to glucose.