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Ionotropic glutamate receptors are ligand-gated transmembrane ion channels activated by the binding of glutamate. The free energy landscapes governing the opening/closing of the GluR2 S1S2 ligand-binding domain in the apo, DNQX-, and glutamate-bound forms are computed by using all-atom molecular dynamics simulations with explicit solvent, in conjunction with an umbrella sampling strategy. The apo...
Membrane depolarization causes voltage-gated ion channels to transition from a resting/closed conformation to an activated/open conformation. We used voltage-clamp fluorometry to measure protein motion at specific regions of the Shaker Kv channel. This enabled us to construct new structural models of the resting/closed and activated/open states based on the Kv1.2 crystal structure using the Rosetta-Membrane...
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