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Yorodumi- PDB-6pby: Single particle cryo-EM structure of the voltage-gated K+ channel... -
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-Basic information
Entry | Database: PDB / ID: 6pby | ||||||||||||
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Title | Single particle cryo-EM structure of the voltage-gated K+ channel Eag1 3-13 deletion mutant bound to calmodulin (conformation 1) | ||||||||||||
Components |
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Keywords | TRANSPORT PROTEIN/CALCIUM BINDING PROTEIN / Voltage-gated potassium channel / ion channel / calmodulin / TRANSPORT PROTEIN-CALCIUM BINDING PROTEIN complex | ||||||||||||
Function / homology | Function and homology information Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / delayed rectifier potassium channel activity / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / parallel fiber to Purkinje cell synapse / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / nuclear inner membrane ...Voltage gated Potassium channels / potassium channel complex / regulation of presynaptic cytosolic calcium ion concentration / delayed rectifier potassium channel activity / voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / parallel fiber to Purkinje cell synapse / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / nuclear inner membrane / Calmodulin induced events / Reduction of cytosolic Ca++ levels / Activation of Ca-permeable Kainate Receptor / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / phosphatidylinositol bisphosphate binding / Loss of phosphorylation of MECP2 at T308 / CREB1 phosphorylation through the activation of Adenylate Cyclase / PKA activation / negative regulation of high voltage-gated calcium channel activity / regulation of synaptic vesicle exocytosis / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / negative regulation of calcium ion export across plasma membrane / organelle localization by membrane tethering / Activation of RAC1 downstream of NMDARs / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / CLEC7A (Dectin-1) induces NFAT activation / autophagosome membrane docking / positive regulation of ryanodine-sensitive calcium-release channel activity / Negative regulation of NMDA receptor-mediated neuronal transmission / regulation of cell communication by electrical coupling involved in cardiac conduction / startle response / Unblocking of NMDA receptors, glutamate binding and activation / negative regulation of peptidyl-threonine phosphorylation / Synthesis of IP3 and IP4 in the cytosol / Phase 0 - rapid depolarisation / protein phosphatase activator activity / RHO GTPases activate PAKs / positive regulation of cyclic-nucleotide phosphodiesterase activity / positive regulation of phosphoprotein phosphatase activity / Long-term potentiation / Ion transport by P-type ATPases / Uptake and function of anthrax toxins / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / catalytic complex / DARPP-32 events / axolemma / detection of calcium ion / negative regulation of ryanodine-sensitive calcium-release channel activity / Smooth Muscle Contraction / RHO GTPases activate IQGAPs / regulation of cardiac muscle contraction / calcium channel inhibitor activity / cellular response to interferon-beta / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Protein methylation / voltage-gated potassium channel complex / Activation of AMPK downstream of NMDARs / eNOS activation / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / regulation of calcium-mediated signaling / positive regulation of protein dephosphorylation / titin binding / regulation of ryanodine-sensitive calcium-release channel activity / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / Ion homeostasis / positive regulation of protein autophosphorylation / potassium ion transmembrane transport / sperm midpiece / calcium channel complex / substantia nigra development / cellular response to calcium ion / adenylate cyclase activator activity / Ras activation upon Ca2+ influx through NMDA receptor / regulation of membrane potential / regulation of heart rate / monoatomic ion transmembrane transport / protein serine/threonine kinase activator activity / sarcomere / FCERI mediated Ca+2 mobilization / FCGR3A-mediated IL10 synthesis / 14-3-3 protein binding / VEGFR2 mediated vascular permeability / positive regulation of peptidyl-threonine phosphorylation / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / VEGFR2 mediated cell proliferation / regulation of cytokinesis / Translocation of SLC2A4 (GLUT4) to the plasma membrane / spindle microtubule / postsynaptic density membrane / RAF activation / positive regulation of receptor signaling pathway via JAK-STAT / positive regulation of protein serine/threonine kinase activity / Transcriptional activation of mitochondrial biogenesis / Stimuli-sensing channels / spindle pole / cellular response to type II interferon / response to calcium ion Similarity search - Function | ||||||||||||
Biological species | Rattus norvegicus (Norway rat) Homo sapiens (human) | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.67 Å | ||||||||||||
Authors | Whicher, J.R. / MacKinnon, R. | ||||||||||||
Funding support | United States, 3items
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Citation | Journal: Elife / Year: 2019 Title: Regulation of Eag1 gating by its intracellular domains. Authors: Jonathan R Whicher / Roderick MacKinnon / Abstract: Voltage-gated potassium channels (Ks) are gated by transmembrane voltage sensors (VS) that move in response to changes in membrane voltage. K10.1 or Eag1 also has three intracellular domains: PAS, C- ...Voltage-gated potassium channels (Ks) are gated by transmembrane voltage sensors (VS) that move in response to changes in membrane voltage. K10.1 or Eag1 also has three intracellular domains: PAS, C-linker, and CNBHD. We demonstrate that the Eag1 intracellular domains are not required for voltage-dependent gating but likely interact with the VS to modulate gating. We identified specific interactions between the PAS, CNBHD, and VS that modulate voltage-dependent gating and provide evidence that VS movement destabilizes these interactions to promote channel opening. Additionally, mutation of these interactions renders Eag1 insensitive to calmodulin inhibition. The structure of the calmodulin insensitive mutant in a pre-open conformation suggests that channel opening may occur through a rotation of the intracellular domains and calmodulin may prevent this rotation by stabilizing interactions between the VS and intracellular domains. Intracellular domains likely play a similar modulatory role in voltage-dependent gating of the related K11-12 channels. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | Molecule: MolmilJmol/JSmol |
-Downloads & links
-Download
PDBx/mmCIF format | 6pby.cif.gz | 621.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb6pby.ent.gz | 486.2 KB | Display | PDB format |
PDBx/mmJSON format | 6pby.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/pb/6pby ftp://data.pdbj.org/pub/pdb/validation_reports/pb/6pby | HTTPS FTP |
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-Related structure data
Related structure data | 20295MC 6pbxC C: citing same article (ref.) M: map data used to model this data |
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Similar structure data |
-Links
-Assembly
Deposited unit |
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-Components
#1: Protein | Mass: 96261.430 Da / Num. of mol.: 4 / Fragment: UNP residues 14-773,888-962 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Rattus norvegicus (Norway rat) / Gene: Kcnh1, Eag / Production host: Homo sapiens (human) / References: UniProt: Q63472 #2: Protein | Mass: 16852.545 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: CALM1, CALM, CAM, CAM1 / Production host: Homo sapiens (human) / References: UniProt: P0DP23 |
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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 |
-Sample preparation
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Source (natural) |
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Source (recombinant) |
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Buffer solution | pH: 8 | ||||||||||||||||||||||||
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||
Specimen support | Details: unspecified | ||||||||||||||||||||||||
Vitrification | Cryogen name: ETHANE |
-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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
Electron lens | Mode: BRIGHT FIELDBright-field microscopy |
Image recording | Electron dose: 1.6 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
-Processing
Software | Name: PHENIX / Version: 1.14_3260: / Classification: refinement | ||||||||||||||||||||||||||||||||
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EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C4 (4 fold cyclic) | ||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.67 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 43137 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||
Atomic model building | Protocol: FLEXIBLE FIT / Space: REAL | ||||||||||||||||||||||||||||||||
Atomic model building | PDB-ID: 5K7L Accession code: 5K7L / Source name: PDB / Type: experimental model |