P 85 KCNQ-2 missense mutations and phosphatidylinositol 4,5-bisphosphate in familial epilepsy

The KCNQ2/3 channel is a slowly activating, non-inactivating voltage-gated potassium channel. It causes the M-current and sustains the resting membrane potential. Therefore, it is crucial for the regulation of neuronal plasticity. If a neuron does not reach the resting-potential after activation, excitation may spread throughout the neuronal network and a seizure may follow.In this work we study the influence of the intracellular second messenger phosphatidylinositol 4,5-bisphosphate (PIP2) on channels containing mutant KCNQ2 subunits associated with Benign Familial Neonatal Convulsions (BFNC).

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