Fructose 2,6-bisphosphate abbreviated Fru-2,6-P2, is a metabolite that allosterically affects the activity of the enzymes phosphofructokinase 1 (PFK-1) and fructose 1,6-bisphosphatase (FBPase-1) to regulate glycolysis and gluconeogenesis. Fru-2,6-P2 is synthesized and broken down by the bifunctional enzyme phosphofructokinase 2/fructose-2,6-bisphosphatase (PFK-2/FBPase-2).
The synthesis of Fru-2,6-P2 is performed through the phosphorylation of fr...
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Fructose 2,6-bisphosphate abbreviated Fru-2,6-P2, is a metabolite that allosterically affects the activity of the enzymes phosphofructokinase 1 (PFK-1) and fructose 1,6-bisphosphatase (FBPase-1) to regulate glycolysis and gluconeogenesis. Fru-2,6-P2 is synthesized and broken down by the bifunctional enzyme phosphofructokinase 2/fructose-2,6-bisphosphatase (PFK-2/FBPase-2).
The synthesis of Fru-2,6-P2 is performed through the phosphorylation of fructose 6-phosphate using ATP by the PFK-2 portion of the enzyme. The breakdown of Fru-2,6-P2 is catalyzed by dephosphorylation by FBPase-2 to produce Fructose 6-phosphate and Pi.
Reaction scheme of breakdown of fructose 2,6-bisphosphate to fructose 6-phosphate.
Fru-2,6-P2 strongly activates glucose breakdown in glycolysis through allosteric modulation of phosphofructokinase 1. Elevated expression of Fru-2,6-P2 levels in the liver allosterically activates phosphofructokinase 1 by increasing the enzyme’s affinity for fructose 6-phosphate, while...
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