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Open data
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Basic information
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Title | Cryo-EM structure of Nav1.7 with LTG | |||||||||
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Function / homology | ![]() corticospinal neuron axon guidance / positive regulation of voltage-gated sodium channel activity / response to pyrethroid / detection of mechanical stimulus involved in sensory perception / voltage-gated sodium channel activity involved in Purkinje myocyte action potential / regulation of sodium ion transmembrane transporter activity / voltage-gated sodium channel activity involved in cardiac muscle cell action potential / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / membrane depolarization during Purkinje myocyte cell action potential / regulation of atrial cardiac muscle cell membrane depolarization ...corticospinal neuron axon guidance / positive regulation of voltage-gated sodium channel activity / response to pyrethroid / detection of mechanical stimulus involved in sensory perception / voltage-gated sodium channel activity involved in Purkinje myocyte action potential / regulation of sodium ion transmembrane transporter activity / voltage-gated sodium channel activity involved in cardiac muscle cell action potential / voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization / membrane depolarization during Purkinje myocyte cell action potential / regulation of atrial cardiac muscle cell membrane depolarization / cardiac conduction / membrane depolarization during cardiac muscle cell action potential / positive regulation of sodium ion transport / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
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![]() | Fan X / Huang J / Yan N | |||||||||
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![]() | ![]() Title: Dual-pocket inhibition of Na channels by the antiepileptic drug lamotrigine. Authors: Jian Huang / Xiao Fan / Xueqin Jin / Liming Teng / Nieng Yan / ![]() ![]() Abstract: Voltage-gated sodium (Na) channels govern membrane excitability, thus setting the foundation for various physiological and neuronal processes. Na channels serve as the primary targets for several ...Voltage-gated sodium (Na) channels govern membrane excitability, thus setting the foundation for various physiological and neuronal processes. Na channels serve as the primary targets for several classes of widely used and investigational drugs, including local anesthetics, antiepileptic drugs, antiarrhythmics, and analgesics. In this study, we present cryogenic electron microscopy (cryo-EM) structures of human Na1.7 bound to two clinical drugs, riluzole (RLZ) and lamotrigine (LTG), at resolutions of 2.9 Å and 2.7 Å, respectively. A 3D EM reconstruction of ligand-free Na1.7 was also obtained at 2.1 Å resolution. RLZ resides in the central cavity of the pore domain and is coordinated by residues from repeats III and IV. Whereas one LTG molecule also binds to the central cavity, the other is found beneath the intracellular gate, known as site BIG. Therefore, LTG, similar to lacosamide and cannabidiol, blocks Na channels via a dual-pocket mechanism. These structures, complemented with docking and mutational analyses, also explain the structure-activity relationships of the LTG-related linear 6,6 series that have been developed for improved efficacy and subtype specificity on different Na channels. Our findings reveal the molecular basis for these drugs' mechanism of action and will aid the development of novel antiepileptic and pain-relieving drugs. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
Map data | ![]() | 59.5 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 20.2 KB 20.2 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 8.4 KB | Display | ![]() |
Images | ![]() | 51.2 KB | ||
Masks | ![]() | 64 MB | ![]() | |
Filedesc metadata | ![]() | 7.6 KB | ||
Others | ![]() ![]() | 59.3 MB 59.3 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8thhMC ![]() 8thgC M: atomic model generated by this map C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.036 Å | ||||||||||||||||||||
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
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Sample components
+Entire : Human voltage-gated sodium channel Nav1.7 with beta subunits
+Supramolecule #1: Human voltage-gated sodium channel Nav1.7 with beta subunits
+Macromolecule #1: Sodium channel protein type 9 subunit alpha
+Macromolecule #2: Sodium channel subunit beta-1
+Macromolecule #3: Sodium channel subunit beta-2
+Macromolecule #5: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #6: (6M)-6-(2,3-dichlorophenyl)-1,2,4-triazine-3,5-diamine
+Macromolecule #7: CHOLESTEROL HEMISUCCINATE
+Macromolecule #8: 1-O-OCTADECYL-SN-GLYCERO-3-PHOSPHOCHOLINE
+Macromolecule #9: 1,2-DIOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
+Macromolecule #10: O-[(R)-{[(2R)-2,3-bis(octadecanoyloxy)propyl]oxy}(hydroxy)phospho...
+Macromolecule #11: water
-Experimental details
-Structure determination
Method | ![]() |
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Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD![]() |
Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 40.0 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |