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Yorodumi- EMDB-27736: RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands -
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Open data
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Basic information
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| Title | RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands | |||||||||
Map data | RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands | |||||||||
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Keywords | Ryanodine receptor / Ion channel / Snake toxin / Calcin / Complex / Membrane protein | |||||||||
| Function / homology | Function and homology informationATP-gated ion channel activity / positive regulation of sequestering of calcium ion / negative regulation of calcium-mediated signaling / negative regulation of insulin secretion involved in cellular response to glucose stimulus / neuronal action potential propagation / negative regulation of release of sequestered calcium ion into cytosol / insulin secretion involved in cellular response to glucose stimulus / terminal cisterna / ryanodine receptor complex / ryanodine-sensitive calcium-release channel activity ...ATP-gated ion channel activity / positive regulation of sequestering of calcium ion / negative regulation of calcium-mediated signaling / negative regulation of insulin secretion involved in cellular response to glucose stimulus / neuronal action potential propagation / negative regulation of release of sequestered calcium ion into cytosol / insulin secretion involved in cellular response to glucose stimulus / terminal cisterna / ryanodine receptor complex / ryanodine-sensitive calcium-release channel activity / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / response to redox state / release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / Calmodulin induced events / ossification involved in bone maturation / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / 'de novo' protein folding / negative regulation of heart rate / Loss of phosphorylation of MECP2 at T308 / CREB1 phosphorylation through the activation of Adenylate Cyclase / cellular response to caffeine / CaMK IV-mediated phosphorylation of CREB / PKA activation / negative regulation of high voltage-gated calcium channel activity / Glycogen breakdown (glycogenolysis) / CLEC7A (Dectin-1) induces NFAT activation / skin development / Activation of RAC1 downstream of NMDARs / negative regulation of ryanodine-sensitive calcium-release channel activity / organelle localization by membrane tethering / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / FK506 binding / negative regulation of calcium ion export across plasma membrane / regulation of cardiac muscle cell action potential / presynaptic endocytosis / organelle membrane / Synthesis of IP3 and IP4 in the cytosol / regulation of cell communication by electrical coupling involved in cardiac conduction / Phase 0 - rapid depolarisation / calcineurin-mediated signaling / Negative regulation of NMDA receptor-mediated neuronal transmission / Unblocking of NMDA receptors, glutamate binding and activation / intracellularly gated calcium channel activity / smooth endoplasmic reticulum / RHO GTPases activate PAKs / outflow tract morphogenesis / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / regulation of ryanodine-sensitive calcium-release channel activity / protein phosphatase activator activity / Long-term potentiation / smooth muscle contraction / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / DARPP-32 events / catalytic complex / Smooth Muscle Contraction / detection of calcium ion / regulation of cardiac muscle contraction / toxic substance binding / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / T cell proliferation / striated muscle contraction / voltage-gated calcium channel activity / cellular response to interferon-beta / Protein methylation / calcium channel inhibitor activity / Activation of AMPK downstream of NMDARs / presynaptic cytosol / skeletal muscle fiber development / Ion homeostasis / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / eNOS activation / titin binding / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / sperm midpiece / regulation of calcium-mediated signaling / release of sequestered calcium ion into cytosol / voltage-gated potassium channel complex / calcium channel complex / FCERI mediated Ca+2 mobilization / substantia nigra development / sarcoplasmic reticulum membrane / muscle contraction / Ras activation upon Ca2+ influx through NMDA receptor / regulation of heart rate / FCGR3A-mediated IL10 synthesis / cellular response to calcium ion / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / calyx of Held / sarcoplasmic reticulum / adenylate cyclase activator activity / protein maturation / sarcomere Similarity search - Function | |||||||||
| Biological species | ![]() Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.84 Å | |||||||||
Authors | Haji-Ghassemi O / Van Petegm F | |||||||||
| Funding support | Canada, 2 items
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Citation | Journal: Sci Adv / Year: 2023Title: Cryo-EM analysis of scorpion toxin binding to Ryanodine Receptors reveals subconductance that is abolished by PKA phosphorylation. Authors: Omid Haji-Ghassemi / Yu Seby Chen / Kellie Woll / Georgina B Gurrola / Carmen R Valdivia / Wenxuan Cai / Songhua Li / Hector H Valdivia / Filip Van Petegem / ![]() Abstract: Calcins are peptides from scorpion venom with the unique ability to cross cell membranes, gaining access to intracellular targets. Ryanodine Receptors (RyR) are intracellular ion channels that ...Calcins are peptides from scorpion venom with the unique ability to cross cell membranes, gaining access to intracellular targets. Ryanodine Receptors (RyR) are intracellular ion channels that control release of Ca from the endoplasmic and sarcoplasmic reticulum. Calcins target RyRs and induce long-lived subconductance states, whereby single-channel currents are decreased. We used cryo-electron microscopy to reveal the binding and structural effects of imperacalcin, showing that it opens the channel pore and causes large asymmetry throughout the cytosolic assembly of the tetrameric RyR. This also creates multiple extended ion conduction pathways beyond the transmembrane region, resulting in subconductance. Phosphorylation of imperacalcin by protein kinase A prevents its binding to RyR through direct steric hindrance, showing how posttranslational modifications made by the host organism can determine the fate of a natural toxin. The structure provides a direct template for developing calcin analogs that result in full channel block, with potential to treat RyR-related disorders. | |||||||||
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Structure visualization
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Downloads & links
-EMDB archive
| Map data | emd_27736.map.gz | 481.1 MB | EMDB map data format | |
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| Header (meta data) | emd-27736-v30.xml emd-27736.xml | 26.6 KB 26.6 KB | Display Display | EMDB header |
| FSC (resolution estimation) | emd_27736_fsc.xml | 19.3 KB | Display | FSC data file |
| Images | emd_27736.png | 85.2 KB | ||
| Filedesc metadata | emd-27736.cif.gz | 10.1 KB | ||
| Others | emd_27736_half_map_1.map.gz emd_27736_half_map_2.map.gz | 474.8 MB 474.8 MB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-27736 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-27736 | HTTPS FTP |
-Validation report
| Summary document | emd_27736_validation.pdf.gz | 1.2 MB | Display | EMDB validaton report |
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| Full document | emd_27736_full_validation.pdf.gz | 1.2 MB | Display | |
| Data in XML | emd_27736_validation.xml.gz | 26.5 KB | Display | |
| Data in CIF | emd_27736_validation.cif.gz | 34.9 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-27736 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-27736 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8dveMC ![]() 8drpC ![]() 8dtbC ![]() 8dujC C: citing same article ( M: atomic model generated by this map |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_27736.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||
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| Annotation | RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands | ||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 0.94 Å | ||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
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-Supplemental data
-Half map: RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands
| File | emd_27736_half_map_1.map | ||||||||||||
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| Annotation | RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands | ||||||||||||
| Projections & Slices |
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| Density Histograms |
-Half map: RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands
| File | emd_27736_half_map_2.map | ||||||||||||
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| Annotation | RyR1 in presence of IpCa-T26E phosphomimetic and activating ligands | ||||||||||||
| Projections & Slices |
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| Density Histograms |
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Sample components
+Entire : RyR1 complex with activating ligands in open state
+Supramolecule #1: RyR1 complex with activating ligands in open state
+Supramolecule #2: Ryanodine receptor 1
+Supramolecule #3: Peptidyl-prolyl cis-trans isomerase FKBP1B, Calmodulin-1
+Macromolecule #1: Ryanodine receptor 1
+Macromolecule #2: Peptidyl-prolyl cis-trans isomerase FKBP1B
+Macromolecule #3: Calmodulin-1
+Macromolecule #4: CAFFEINE
+Macromolecule #5: CALCIUM ION
+Macromolecule #6: ADENOSINE-5'-TRIPHOSPHATE
+Macromolecule #7: ZINC ION
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 10 mg/mL |
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| Buffer | pH: 7.4 |
| Grid | Model: Quantifoil R2/2 / Mesh: 300 |
| Vitrification | Cryogen name: ETHANE |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Specialist optics | Energy filter - Name: TFS Selectris |
| Image recording | Film or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 50.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.0 µm |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
| Initial model | PDB ID: Chain - Chain ID: A / Chain - Source name: PDB / Chain - Initial model type: experimental model |
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| Refinement | Space: REAL / Protocol: RIGID BODY FIT / Target criteria: Correlation coefficient |
| Output model | ![]() PDB-8dve: |
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About Yorodumi



Keywords
Homo sapiens (human)
Authors
Canada, 2 items
Citation





























Z (Sec.)
Y (Row.)
X (Col.)







































FIELD EMISSION GUN


