Structural Models of Ligand-Bound Sodium Channels
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X-ray and cryo-EM structures of tetrameric and pseudo-tetrameric P-loop channels are used to elaborate homology models of mammalian voltage-gated sodium channels with drugs and neurotoxins. Such models integrate experimental data, assist in planning new experiments, and may facilitate drug design. This chapter outlines sodium channel models with local anesthetics, anticonvulsants, and antiarrhythmics, which are used to manage pain and treat sodium channelopathies. Further summarized are sodium channel models with tetrodotoxin, mu-conotoxins, batrachotoxin, scorpion toxins, and insecticides. Possible involvement of sodium ions in the action of some ligands is discussed.
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