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- EMDB-34891: Cryo-EM structure of human high-voltage activated L-type calcium ... -
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Open data
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Basic information
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Title | Cryo-EM structure of human high-voltage activated L-type calcium channel CaV1.2 in complex with tetrandrine (TET) | |||||||||
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![]() | tet bound state / ![]() | |||||||||
Function / homology | ![]() voltage-gated calcium channel activity involved in regulation of presynaptic cytosolic calcium levels / positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / membrane depolarization during atrial cardiac muscle cell action potential / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during AV node cell action potential / membrane depolarization during bundle of His cell action potential ...voltage-gated calcium channel activity involved in regulation of presynaptic cytosolic calcium levels / positive regulation of calcium ion transmembrane transport via high voltage-gated calcium channel / regulation of membrane repolarization during action potential / Presynaptic depolarization and calcium channel opening / positive regulation of high voltage-gated calcium channel activity / membrane depolarization during atrial cardiac muscle cell action potential / Phase 2 - plateau phase / calcium ion transmembrane transport via high voltage-gated calcium channel / membrane depolarization during AV node cell action potential / membrane depolarization during bundle of His cell action potential / ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Similarity search - Function | |||||||||
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![]() | Wei Y / Yu Z / Zhao Y | |||||||||
Funding support | ![]()
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![]() | ![]() Title: Structural bases of inhibitory mechanism of Ca1.2 channel inhibitors. Authors: Yiqing Wei / Zhuoya Yu / Lili Wang / Xiaojing Li / Na Li / Qinru Bai / Yuhang Wang / Renjie Li / Yufei Meng / Hao Xu / Xianping Wang / Yanli Dong / Zhuo Huang / Xuejun Cai Zhang / Yan Zhao / ![]() Abstract: The voltage-gated calcium channel Ca1.2 is essential for cardiac and vessel smooth muscle contractility and brain function. Accumulating evidence demonstrates that malfunctions of Ca1.2 are involved ...The voltage-gated calcium channel Ca1.2 is essential for cardiac and vessel smooth muscle contractility and brain function. Accumulating evidence demonstrates that malfunctions of Ca1.2 are involved in brain and heart diseases. Pharmacological inhibition of Ca1.2 is therefore of therapeutic value. Here, we report cryo-EM structures of Ca1.2 in the absence or presence of the antirheumatic drug tetrandrine or antihypertensive drug benidipine. Tetrandrine acts as a pore blocker in a pocket composed of S6, S6, and S6 helices and forms extensive hydrophobic interactions with Ca1.2. Our structure elucidates that benidipine is located in the D-D fenestration site. Its hydrophobic sidechain, phenylpiperidine, is positioned at the exterior of the pore domain and cradled within a hydrophobic pocket formed by S5, S6, and S6 helices, providing additional interactions to exert inhibitory effects on both L-type and T-type voltage gated calcium channels. These findings provide the structural foundation for the rational design and optimization of therapeutic inhibitors of voltage-gated calcium channels. | |||||||||
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Structure visualization
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 118 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 21.4 KB 21.4 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 10.5 KB | Display | ![]() |
Images | ![]() | 44.5 KB | ||
Filedesc metadata | ![]() | 8.5 KB | ||
Others | ![]() ![]() | 116.1 MB 116.1 MB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 8hmaMC ![]() 8hlpC ![]() 8hmbC 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
EMDB pages | ![]() ![]() |
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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: 1.04 Å | ||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||
Details | EMDB XML:
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-Supplemental data
-Half map: #2
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Density Histograms |
-Half map: #1
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Density Histograms |
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Sample components
+Entire : cav1.2alpha2delta1beta2b
+Supramolecule #1: cav1.2alpha2delta1beta2b
+Macromolecule #1: Voltage-dependent L-type calcium channel subunit alpha
+Macromolecule #2: Isoform 2c of Voltage-dependent L-type calcium channel subunit beta-2
+Macromolecule #3: Voltage-dependent calcium channel subunit alpha-2/delta-1
+Macromolecule #4: HEXADECANE
+Macromolecule #5: 1,2-Distearoyl-sn-glycerophosphoethanolamine
+Macromolecule #6: 6,6',7,12-tetramethoxy-2,2'-dimethyl-1beta-3,4-didehydroberbaman
+Macromolecule #7: CALCIUM ION
+Macromolecule #8: 2-acetamido-2-deoxy-beta-D-glucopyranose
+Macromolecule #9: beta-D-mannopyranose
-Experimental details
-Structure determination
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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: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 9.6 e/Å2 |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |