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- PDB-8e5b: Human L-type voltage-gated calcium channel Cav1.3 in the presence... -
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Basic information
Entry | Database: PDB / ID: 8e5b | ||||||
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Title | Human L-type voltage-gated calcium channel Cav1.3 in the presence of Amiodarone and Sofosbuvir at 3.3 Angstrom resolution | ||||||
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![]() | TRANSPORT PROTEIN / Cav1.3 / Channels / Calcium Ion-Selective | ||||||
Function / homology | ![]() voltage-gated calcium channel activity involved SA node cell action potential / voltage-gated calcium channel activity involved in cardiac muscle cell action potential / membrane depolarization during SA node cell action potential / regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / regulation of potassium ion transmembrane transporter activity / positive regulation of high voltage-gated calcium channel activity / regulation of atrial cardiac muscle cell membrane repolarization / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential ...voltage-gated calcium channel activity involved SA node cell action potential / voltage-gated calcium channel activity involved in cardiac muscle cell action potential / membrane depolarization during SA node cell action potential / regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / regulation of potassium ion transmembrane transporter activity / positive regulation of high voltage-gated calcium channel activity / regulation of atrial cardiac muscle cell membrane repolarization / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during bundle of His cell action potential / positive regulation of adenylate cyclase activity / high voltage-gated calcium channel activity / L-type voltage-gated calcium channel complex / membrane depolarization during cardiac muscle cell action potential / positive regulation of calcium ion transport / cardiac muscle cell action potential involved in contraction / regulation of potassium ion transmembrane transport / NCAM1 interactions / regulation of ventricular cardiac muscle cell membrane repolarization / calcium ion import / Sensory processing of sound by inner hair cells of the cochlea / calcium ion transport into cytosol / regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / voltage-gated calcium channel complex / ankyrin binding / neuromuscular junction development / calcium ion import across plasma membrane / neuronal dense core vesicle / regulation of heart rate by cardiac conduction / alpha-actinin binding / regulation of calcium ion transport / calcium channel regulator activity / voltage-gated calcium channel activity / sarcoplasmic reticulum / protein localization to plasma membrane / Regulation of insulin secretion / calcium ion transmembrane transport / sensory perception of sound / adenylate cyclase-modulating G protein-coupled receptor signaling pathway / calcium channel activity / Z disc / Adrenaline,noradrenaline inhibits insulin secretion / cellular response to amyloid-beta / calcium ion transport / T cell receptor signaling pathway / chemical synaptic transmission / synapse / extracellular exosome / membrane / metal ion binding / plasma membrane / cytosol Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
![]() | Gao, S. / Yao, X. / Yan, N. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis for the severe adverse interaction of sofosbuvir and amiodarone on L-type Ca channels. Authors: Xia Yao / Shuai Gao / Jixin Wang / Zhangqiang Li / Jian Huang / Yan Wang / Zhifei Wang / Jiaofeng Chen / Xiao Fan / Weipeng Wang / Xueqin Jin / Xiaojing Pan / Yong Yu / Armando Lagrutta / Nieng Yan / ![]() ![]() Abstract: Drug-drug interaction of the antiviral sofosbuvir and the antiarrhythmics amiodarone has been reported to cause fatal heartbeat slowing. Sofosbuvir and its analog, MNI-1, were reported to potentiate ...Drug-drug interaction of the antiviral sofosbuvir and the antiarrhythmics amiodarone has been reported to cause fatal heartbeat slowing. Sofosbuvir and its analog, MNI-1, were reported to potentiate the inhibition of cardiomyocyte calcium handling by amiodarone, which functions as a multi-channel antagonist, and implicate its inhibitory effect on L-type Ca channels, but the molecular mechanism has remained unclear. Here we present systematic cryo-EM structural analysis of Ca1.1 and Ca1.3 treated with amiodarone or sofosbuvir alone, or sofosbuvir/MNI-1 combined with amiodarone. Whereas amiodarone alone occupies the dihydropyridine binding site, sofosbuvir is not found in the channel when applied on its own. In the presence of amiodarone, sofosbuvir/MNI-1 is anchored in the central cavity of the pore domain through specific interaction with amiodarone and directly obstructs the ion permeation path. Our study reveals the molecular basis for the physical, pharmacodynamic interaction of two drugs on the scaffold of Ca channels. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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PDBx/mmCIF format | ![]() | 475.6 KB | Display | ![]() |
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PDB format | ![]() | 373.6 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 27909MC ![]() 8e56C ![]() 8e57C ![]() 8e58C ![]() 8e59C ![]() 8e5aC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Voltage-dependent L-type calcium channel subunit ... , 2 types, 2 molecules AC
#1: Protein | Mass: 245417.734 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#3: Protein | Mass: 54607.852 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-Protein , 1 types, 1 molecules D
#2: Protein | Mass: 124692.469 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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-Sugars , 4 types, 6 molecules ![](data/chem/img/NAG.gif)
#4: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | ||||
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#5: Polysaccharide | Source method: isolated from a genetically manipulated source #6: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | Source method: isolated from a genetically manipulated source #10: Sugar | ChemComp-NAG / | |
-Non-polymers , 3 types, 4 molecules ![](data/chem/img/BBI.gif)
![](data/chem/img/WG6.gif)
![](data/chem/img/CA.gif)
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![](data/chem/img/CA.gif)
#7: Chemical | ChemComp-BBI / ( |
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#8: Chemical | ChemComp-WG6 / |
#9: Chemical |
-Details
Has ligand of interest | Y |
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-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Cav1.3 / Type: COMPLEX / Entity ID: #1-#3 / Source: RECOMBINANT |
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Molecular weight | Experimental value: NO |
Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 7.4 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2100 nm / Nominal defocus min: 1900 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.19.2_4158: / Classification: refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 69718 / Symmetry type: POINT | ||||||||||||||||||||||||
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