A domain linking the AMPA receptor agonist binding site to the ion pore controls gating and causes lurcher properties when mutated.

Abstract excerpt

Ionotropic, AMPA-type glutamate receptors (GluRs) critically shape excitatory synaptic signals in the CNS. Ligand binding induces conformational changes in the glutamate-binding domain of the receptors that are converted into opening of the channel pore via three short linker sequences, a process referred to as gating. Although crystallization of the glutamate-binding domain and structural models of the ion pore...

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