Glucokinase (GCK1) reversibly binds glucokinase regulatory protein (GKRP) to form an inactive complex. Binding is stimulated by fructose 6-phosphate and sorbitol 6-phosphate (hence high concentrations of these molecules tend to reduce GCK1 activity) and inhibited by fructose 1-phosphate (hence a high concentration of this molecule tends to increase GCK1 activity) (Brocklehurst et al. 2004).
Brocklehurst, KJ, Agius, L, Davies, RA
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