The fructose 2,6-bisphosphatase activity of cytosolic phosphofructokinase 2/fructose-2,6-bisphosphatase catalyzes the hydrolysis of fructose 2,6 bisphosphate to form fructose 6-phosphate. Fructose 2,6 bisphosphate is a key allosteric regulator of PFK1. In its absence the activity of PFK1 is reduced while fructose 1,6-bisphosphatase is activated, thus inhibiting glycolysis and favoring gluconeogenesis (Pilkis et al. 1995).
Kurland, IJ, Lange, AJ, Pilkis, SJ, Claus, TH
fructose-2,6-bisphosphate 2-phosphatase activity of phosphoPFKFB1 dimer [cytosol]
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