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Open data
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Basic information
Entry | Database: PDB / ID: 7b1g | ||||||
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Title | TRPC4 in complex with Calmodulin | ||||||
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![]() | TRANSPORT PROTEIN / ION CHANNEL / TRPC4 / COMPLEX / MEMBRANE PROTEIN / CALMODULIN | ||||||
Function / homology | ![]() CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol ...CaMK IV-mediated phosphorylation of CREB / Cam-PDE 1 activation / CREB1 phosphorylation through the activation of CaMKII/CaMKK/CaMKIV cascasde / Glycogen breakdown (glycogenolysis) / Activation of RAC1 downstream of NMDARs / Reduction of cytosolic Ca++ levels / Sodium/Calcium exchangers / Activation of Ca-permeable Kainate Receptor / CLEC7A (Dectin-1) induces NFAT activation / Synthesis of IP3 and IP4 in the cytosol / RHO GTPases activate PAKs / Calmodulin induced events / Inactivation, recovery and regulation of the phototransduction cascade / Tetrahydrobiopterin (BH4) synthesis, recycling, salvage and regulation / Calcineurin activates NFAT / eNOS activation / Ion transport by P-type ATPases / Unblocking of NMDA receptors, glutamate binding and activation / Protein methylation / RAF activation / VEGFR2 mediated vascular permeability / RAS processing / Smooth Muscle Contraction / Ca2+ pathway / FCERI mediated Ca+2 mobilization / RHO GTPases activate IQGAPs / Extra-nuclear estrogen signaling / RAF/MAP kinase cascade / store-operated calcium channel activity / PKA activation / Platelet degranulation / cation channel complex / Stimuli-sensing channels / Ion homeostasis / type 3 metabotropic glutamate receptor binding / inositol 1,4,5 trisphosphate binding / organelle localization by membrane tethering / regulation of cardiac muscle cell action potential / mitochondrion-endoplasmic reticulum membrane tethering / autophagosome membrane docking / nitric-oxide synthase binding / protein phosphatase activator activity / monoatomic cation transport / adenylate cyclase binding / catalytic complex / detection of calcium ion / regulation of cardiac muscle contraction / negative regulation of ryanodine-sensitive calcium-release channel activity / calcium channel inhibitor activity / cellular response to interferon-beta / monoatomic cation channel activity / phosphatidylinositol 3-kinase binding / regulation of release of sequestered calcium ion into cytosol by sarcoplasmic reticulum / positive regulation of protein dephosphorylation / titin binding / regulation of ryanodine-sensitive calcium-release channel activity / voltage-gated potassium channel complex / sperm midpiece / calcium channel complex / regulation of cytosolic calcium ion concentration / adenylate cyclase activator activity / nitric-oxide synthase regulator activity / regulation of heart rate / sarcomere / protein serine/threonine kinase activator activity / regulation of cytokinesis / calcium ion transmembrane transport / positive regulation of receptor signaling pathway via JAK-STAT / spindle microtubule / cellular response to type II interferon / spindle pole / G2/M transition of mitotic cell cycle / calcium-dependent protein binding / myelin sheath / growth cone / transmembrane transporter binding / protein domain specific binding / centrosome / calcium ion binding / protein kinase binding / nucleoplasm / plasma membrane / cytoplasm / cytosol Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.6 Å | ||||||
![]() | Vinayagam, D. / Quentin, D. / Sistel, O. / Merino, F. / Stabrin, M. / Hofnagel, O. / Ledeboer, M.W. / Malojcic, G. / Raunser, S. | ||||||
Funding support | ![]()
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![]() | ![]() Title: Structural basis of TRPC4 regulation by calmodulin and pharmacological agents. Authors: Deivanayagabarathy Vinayagam / Dennis Quentin / Jing Yu-Strzelczyk / Oleg Sitsel / Felipe Merino / Markus Stabrin / Oliver Hofnagel / Maolin Yu / Mark W Ledeboer / Georg Nagel / Goran ...Authors: Deivanayagabarathy Vinayagam / Dennis Quentin / Jing Yu-Strzelczyk / Oleg Sitsel / Felipe Merino / Markus Stabrin / Oliver Hofnagel / Maolin Yu / Mark W Ledeboer / Georg Nagel / Goran Malojcic / Stefan Raunser / ![]() ![]() Abstract: Canonical transient receptor potential channels (TRPC) are involved in receptor-operated and/or store-operated Ca signaling. Inhibition of TRPCs by small molecules was shown to be promising in ...Canonical transient receptor potential channels (TRPC) are involved in receptor-operated and/or store-operated Ca signaling. Inhibition of TRPCs by small molecules was shown to be promising in treating renal diseases. In cells, the channels are regulated by calmodulin (CaM). Molecular details of both CaM and drug binding have remained elusive so far. Here, we report structures of TRPC4 in complex with three pyridazinone-based inhibitors and CaM. The structures reveal that all the inhibitors bind to the same cavity of the voltage-sensing-like domain and allow us to describe how structural changes from the ligand-binding site can be transmitted to the central ion-conducting pore of TRPC4. CaM binds to the rib helix of TRPC4, which results in the ordering of a previously disordered region, fixing the channel in its closed conformation. This represents a novel CaM-induced regulatory mechanism of canonical TRP channels. | ||||||
History |
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 501 KB | Display | ![]() |
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PDB format | ![]() | 391.8 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 1 MB | Display | ![]() |
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Full document | ![]() | 1.1 MB | Display | |
Data in XML | ![]() | 76.7 KB | Display | |
Data in CIF | ![]() | 113.1 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 11985MC ![]() 7b05C ![]() 7b0jC ![]() 7b0sC ![]() 7b16C C: citing same article ( M: map data used to model this data |
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Similar structure data |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 105204.641 Da / Num. of mol.: 4 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() #2: Protein | | Mass: 16852.545 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() #3: Chemical | ChemComp-CA / #4: Chemical | ChemComp-44E / ( Has ligand of interest | N | |
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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
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Molecular weight | Value: 0.126 MDa / Experimental value: NO | ||||||||||||||||||||||||||||
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Buffer solution | pH: 7.4 | ||||||||||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.35 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid type: Quantifoil R2/1 | ||||||||||||||||||||||||||||
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277 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 magnification: 130000 X / Calibrated magnification: 59000 X / Nominal defocus max: 2800 nm / Nominal defocus min: 1500 nm / Cs: 0.001 mm / C2 aperture diameter: 70 µm / Alignment procedure: ZEMLIN TABLEAU |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Temperature (max): 190 K / Temperature (min): 160 K |
Image recording | Average exposure time: 10 sec. / Electron dose: 88.52 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7972 |
EM imaging optics | Energyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV Spherical aberration corrector: Cs corrector first generation |
Image scans | Sampling size: 5 µm / Width: 3838 / Height: 3710 / Movie frames/image: 80 / Used frames/image: 1-80 |
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Processing
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EM software |
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CTF correction | Type: PHASE FLIPPING ONLY | |||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 678331 | |||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C1 (asymmetric) | |||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 3.6 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 160829 / Algorithm: FOURIER SPACE / Num. of class averages: 4 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||
Atomic model building | B value: 58.04 / Protocol: FLEXIBLE FIT / Space: REAL / Target criteria: Correlation coefficient | |||||||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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Refinement | Cross valid method: NONE Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2 | |||||||||||||||||||||||||||||||||||||||||||||
Displacement parameters | Biso mean: 57.92 Å2 | |||||||||||||||||||||||||||||||||||||||||||||
Refine LS restraints |
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