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- PDB-5v03: A positive allosteric modulator binding pocket in SK2 ion channel... -
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Basic information
Entry | Database: PDB / ID: 5v03 | ||||||
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Title | A positive allosteric modulator binding pocket in SK2 ion channels is shared by Riluzole and CyPPA | ||||||
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![]() | TRANSPORT PROTEIN/Metal Binding protein / calcium-activated ion channels / activator / calmodulin / TRANSPORT PROTEIN-Metal Binding protein complex | ||||||
Function / homology | ![]() small conductance calcium-activated potassium channel activity / Acetylcholine inhibits contraction of outer hair cells / Ca2+ activated K+ channels / membrane repolarization during atrial cardiac muscle cell action potential / calcium-activated potassium channel activity / : / establishment of protein localization to mitochondrial membrane / inward rectifier potassium channel activity / type 3 metabotropic glutamate receptor binding / regulation of potassium ion transmembrane transport ...small conductance calcium-activated potassium channel activity / Acetylcholine inhibits contraction of outer hair cells / Ca2+ activated K+ channels / membrane repolarization during atrial cardiac muscle cell action potential / calcium-activated potassium channel activity / : / establishment of protein localization to mitochondrial membrane / inward rectifier potassium channel activity / type 3 metabotropic glutamate receptor binding / regulation of potassium ion transmembrane transport / CaM pathway / Cam-PDE 1 activation / Sodium/Calcium exchangers / regulation of synaptic vesicle endocytosis / Calmodulin induced events / Reduction of cytosolic Ca++ levels / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Activation of Ca-permeable Kainate Receptor / 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 / CaMK IV-mediated phosphorylation of CREB / Glycogen breakdown (glycogenolysis) / positive regulation of cyclic-nucleotide phosphodiesterase activity / organelle localization by membrane tethering / negative regulation of calcium ion export across plasma membrane / regulation of synaptic vesicle exocytosis / CLEC7A (Dectin-1) induces NFAT activation / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / Activation of RAC1 downstream of NMDARs / response to corticosterone / nitric-oxide synthase binding / positive regulation of ryanodine-sensitive calcium-release channel activity / regulation of cell communication by electrical coupling involved in cardiac conduction / Negative regulation of NMDA receptor-mediated neuronal transmission / negative regulation of peptidyl-threonine phosphorylation / Synthesis of IP3 and IP4 in the cytosol / Unblocking of NMDA receptors, glutamate binding and activation / Phase 0 - rapid depolarisation / alpha-actinin binding / protein phosphatase activator activity / RHO GTPases activate PAKs / positive regulation of phosphoprotein phosphatase activity / Ion transport by P-type ATPases / Long-term potentiation / Uptake and function of anthrax toxins / Calcineurin activates NFAT / Regulation of MECP2 expression and activity / adenylate cyclase binding / catalytic complex / DARPP-32 events / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / Smooth Muscle Contraction / calcium channel inhibitor activity / RHO GTPases activate IQGAPs / cellular response to interferon-beta / positive regulation of DNA binding / regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion / Protein methylation / phosphatidylinositol 3-kinase binding / eNOS activation / Activation of AMPK downstream of NMDARs / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / enzyme regulator activity / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / positive regulation of protein dephosphorylation / Ion homeostasis / regulation of calcium-mediated signaling / regulation of ryanodine-sensitive calcium-release channel activity / titin binding / positive regulation of protein autophosphorylation / potassium ion transmembrane transport / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / response to amphetamine / activation of adenylate cyclase activity / substantia nigra development / adenylate cyclase activator activity / Ras activation upon Ca2+ influx through NMDA receptor / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / FCERI mediated Ca+2 mobilization / FCGR3A-mediated IL10 synthesis / VEGFR2 mediated vascular permeability / regulation of cytokinesis / Antigen activates B Cell Receptor (BCR) leading to generation of second messengers / positive regulation of peptidyl-threonine phosphorylation / VEGFR2 mediated cell proliferation / positive regulation of nitric-oxide synthase activity / Translocation of SLC2A4 (GLUT4) to the plasma membrane / mitochondrial membrane / positive regulation of receptor signaling pathway via JAK-STAT Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ![]() ![]() ![]() | ||||||
![]() | Liu, S. | ||||||
![]() | ![]() Title: An Intracellular Allosteric Modulator Binding Pocket in SK2 Ion Channels Is Shared by Multiple Chemotypes. Authors: Cho, L.T. / Alexandrou, A.J. / Torella, R. / Knafels, J. / Hobbs, J. / Taylor, T. / Loucif, A. / Konopacka, A. / Bell, S. / Stevens, E.B. / Pandit, J. / Horst, R. / Withka, J.M. / Pryde, D.C. ...Authors: Cho, L.T. / Alexandrou, A.J. / Torella, R. / Knafels, J. / Hobbs, J. / Taylor, T. / Loucif, A. / Konopacka, A. / Bell, S. / Stevens, E.B. / Pandit, J. / Horst, R. / Withka, J.M. / Pryde, D.C. / Liu, S. / Young, G.T. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 115.2 KB | Display | ![]() |
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PDB format | ![]() | 88 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 749.2 KB | Display | ![]() |
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Full document | ![]() | 750.3 KB | Display | |
Data in XML | ![]() | 12.4 KB | Display | |
Data in CIF | ![]() | 17.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 5v02C ![]() 4gowS C: citing same article ( S: Starting model for refinement |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Unit cell |
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Components on special symmetry positions |
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Components
-Protein , 2 types, 2 molecules BR
#1: Protein | Mass: 12243.395 Da / Num. of mol.: 1 / Fragment: UNP residues 395-486 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Production host: ![]() References: UniProt: Q9H2S1 |
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#2: Protein | Mass: 16852.545 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() Gene: CALM1, CALM, CAM, CAM1, CALM2, CAM2, CAMB, CALM3, CALML2, CAM3, CAMC, CAMIII Production host: ![]() References: UniProt: P62158, UniProt: P0DP23*PLUS |
-Non-polymers , 4 types, 180 molecules ![](data/chem/img/SO4.gif)
![](data/chem/img/658.gif)
![](data/chem/img/CA.gif)
![](data/chem/img/HOH.gif)
![](data/chem/img/658.gif)
![](data/chem/img/CA.gif)
![](data/chem/img/HOH.gif)
#3: Chemical | ChemComp-SO4 / | ||
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#4: Chemical | ChemComp-658 / | ||
#5: Chemical | #6: Water | ChemComp-HOH / | |
-Experimental details
-Experiment
Experiment | Method: ![]() |
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Sample preparation
Crystal | Density Matthews: 2.89 Å3/Da / Density % sol: 57.43 % |
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Crystal grow | Temperature: 295 K / Method: vapor diffusion, hanging drop / Details: ammonia sulfate |
-Data collection
Diffraction | Mean temperature: 100 K |
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Diffraction source | Source: ![]() ![]() ![]() |
Detector | Type: DECTRIS PILATUS3 6M / Detector: PIXEL / Date: Nov 11, 2015 |
Radiation | Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray |
Radiation wavelength | Wavelength: 1 Å / Relative weight: 1 |
Reflection | Resolution: 1.58→50.47 Å / Num. obs: 41783 / % possible obs: 91.3 % / Observed criterion σ(I): 0 / Redundancy: 3 % / Biso Wilson estimate: 29.58 Å2 / CC1/2: 0.998 / Rmerge(I) obs: 0.032 / Net I/σ(I): 18.1 |
Reflection shell | Resolution: 1.58→1.66 Å / Redundancy: 2 % / Rmerge(I) obs: 0.268 / Mean I/σ(I) obs: 2.4 / Num. unique obs: 8155 / CC1/2: 0.937 / % possible all: 60.3 |
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Processing
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Refinement | Method to determine structure: ![]() Starting model: 4GOW Resolution: 1.58→23.08 Å / Cor.coef. Fo:Fc: 0.945 / Cor.coef. Fo:Fc free: 0.93 / SU R Cruickshank DPI: 0.079 / Cross valid method: THROUGHOUT / σ(F): 0 / SU R Blow DPI: 0.081 / SU Rfree Blow DPI: 0.081 / SU Rfree Cruickshank DPI: 0.08
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Displacement parameters | Biso mean: 39.08 Å2
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Refine analyze | Luzzati coordinate error obs: 0.22 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Refinement step | Cycle: 1 / Resolution: 1.58→23.08 Å
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Refine LS restraints |
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LS refinement shell | Resolution: 1.58→1.62 Å / Total num. of bins used: 20
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Refinement TLS params. | Method: refined / Refine-ID: X-RAY DIFFRACTION
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Refinement TLS group |
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