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Open data
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Basic information
| Entry | Database: PDB / ID: 5k47 | |||||||||
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| Title | CryoEM structure of the human Polycystin-2/PKD2 TRP channel | |||||||||
Components | Polycystin-2 | |||||||||
Keywords | TRANSPORT PROTEIN / ion channel / transient receptor potential channel / polycystic kidney disease / Structural Genomics / Structural Genomics Consortium / SGC | |||||||||
| Function / homology | Function and homology informationdetection of nodal flow / metanephric smooth muscle tissue development / metanephric cortex development / metanephric cortical collecting duct development / metanephric distal tubule development / polycystin complex / mesonephric tubule development / mesonephric duct development / metanephric part of ureteric bud development / renal tubule morphogenesis ...detection of nodal flow / metanephric smooth muscle tissue development / metanephric cortex development / metanephric cortical collecting duct development / metanephric distal tubule development / polycystin complex / mesonephric tubule development / mesonephric duct development / metanephric part of ureteric bud development / renal tubule morphogenesis / determination of liver left/right asymmetry / metanephric ascending thin limb development / metanephric mesenchyme development / metanephric S-shaped body morphogenesis / basal cortex / renal artery morphogenesis / HLH domain binding / calcium-induced calcium release activity / migrasome / cilium organization / VxPx cargo-targeting to cilium / detection of mechanical stimulus / muscle alpha-actinin binding / regulation of calcium ion import / voltage-gated monoatomic ion channel activity / placenta blood vessel development / cellular response to hydrostatic pressure / cellular response to fluid shear stress / outward rectifier potassium channel activity / cation channel complex / non-motile cilium / actinin binding / cellular response to osmotic stress / determination of left/right symmetry / : / voltage-gated monoatomic cation channel activity / neural tube development / voltage-gated sodium channel activity / aorta development / motile cilium / branching involved in ureteric bud morphogenesis / ciliary membrane / protein heterotetramerization / negative regulation of G1/S transition of mitotic cell cycle / spinal cord development / heart looping / positive regulation of phospholipase C-activating G protein-coupled receptor signaling pathway / cytoplasmic side of endoplasmic reticulum membrane / centrosome duplication / voltage-gated potassium channel activity / cell surface receptor signaling pathway via JAK-STAT / potassium channel activity / embryonic placenta development / monoatomic cation channel activity / voltage-gated calcium channel activity / transcription regulator inhibitor activity / cytoskeletal protein binding / release of sequestered calcium ion into cytosol / potassium ion transmembrane transport / sodium ion transmembrane transport / cellular response to calcium ion / basal plasma membrane / cytoplasmic vesicle membrane / cellular response to cAMP / lumenal side of endoplasmic reticulum membrane / cellular response to reactive oxygen species / protein tetramerization / phosphoprotein binding / establishment of localization in cell / liver development / calcium ion transmembrane transport / Wnt signaling pathway / intracellular calcium ion homeostasis / positive regulation of nitric oxide biosynthetic process / mitotic spindle / cell-cell junction / calcium ion transport / lamellipodium / regulation of cell population proliferation / heart development / ATPase binding / protein homotetramerization / basolateral plasma membrane / transmembrane transporter binding / cell surface receptor signaling pathway / regulation of cell cycle / cilium / ciliary basal body / signaling receptor binding / negative regulation of cell population proliferation / calcium ion binding / positive regulation of gene expression / endoplasmic reticulum membrane / endoplasmic reticulum / Golgi apparatus / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / extracellular exosome / identical protein binding / membrane Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 4.22 Å | |||||||||
Authors | Pike, A.C.W. / Grieben, M. / Shintre, C.A. / Tessitore, A. / Shrestha, L. / Mukhopadhyay, S. / Mahajan, P. / Chalk, R. / Burgess-Brown, N.A. / Huiskonen, J.T. ...Pike, A.C.W. / Grieben, M. / Shintre, C.A. / Tessitore, A. / Shrestha, L. / Mukhopadhyay, S. / Mahajan, P. / Chalk, R. / Burgess-Brown, N.A. / Huiskonen, J.T. / Arrowsmith, C.H. / Edwards, A.M. / Bountra, C. / Carpenter, E.P. / Structural Genomics Consortium (SGC) | |||||||||
| Funding support | United Kingdom, 1items
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Citation | Journal: Nat Struct Mol Biol / Year: 2017Title: Structure of the polycystic kidney disease TRP channel Polycystin-2 (PC2). Authors: Mariana Grieben / Ashley C W Pike / Chitra A Shintre / Elisa Venturi / Sam El-Ajouz / Annamaria Tessitore / Leela Shrestha / Shubhashish Mukhopadhyay / Pravin Mahajan / Rod Chalk / Nicola A ...Authors: Mariana Grieben / Ashley C W Pike / Chitra A Shintre / Elisa Venturi / Sam El-Ajouz / Annamaria Tessitore / Leela Shrestha / Shubhashish Mukhopadhyay / Pravin Mahajan / Rod Chalk / Nicola A Burgess-Brown / Rebecca Sitsapesan / Juha T Huiskonen / Elisabeth P Carpenter / ![]() Abstract: Mutations in either polycystin-1 (PC1 or PKD1) or polycystin-2 (PC2, PKD2 or TRPP1) cause autosomal-dominant polycystic kidney disease (ADPKD) through unknown mechanisms. Here we present the ...Mutations in either polycystin-1 (PC1 or PKD1) or polycystin-2 (PC2, PKD2 or TRPP1) cause autosomal-dominant polycystic kidney disease (ADPKD) through unknown mechanisms. Here we present the structure of human PC2 in a closed conformation, solved by electron cryomicroscopy at 4.2-Å resolution. The structure reveals a novel polycystin-specific 'tetragonal opening for polycystins' (TOP) domain tightly bound to the top of a classic transient receptor potential (TRP) channel structure. The TOP domain is formed from two extensions to the voltage-sensor-like domain (VSLD); it covers the channel's endoplasmic reticulum lumen or extracellular surface and encloses an upper vestibule, above the pore filter, without blocking the ion-conduction pathway. The TOP-domain fold is conserved among the polycystins, including the homologous channel-like region of PC1, and is the site of a cluster of ADPKD-associated missense variants. Extensive contacts among the TOP-domain subunits, the pore and the VSLD provide ample scope for regulation through physical and chemical stimuli. | |||||||||
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Structure visualization
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| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 5k47.cif.gz | 397.2 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb5k47.ent.gz | 320 KB | Display | PDB format |
| PDBx/mmJSON format | 5k47.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 5k47_validation.pdf.gz | 1.6 MB | Display | wwPDB validaton report |
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| Full document | 5k47_full_validation.pdf.gz | 1.6 MB | Display | |
| Data in XML | 5k47_validation.xml.gz | 56.2 KB | Display | |
| Data in CIF | 5k47_validation.cif.gz | 86.6 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/k4/5k47 ftp://data.pdbj.org/pub/pdb/validation_reports/k4/5k47 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 8200MC M: map data used to model this data C: citing same article ( |
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| Similar structure data |
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Assembly
| Deposited unit | ![]()
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| Noncrystallographic symmetry (NCS) | NCS domain:
NCS domain segments: Component-ID: _ / Beg auth comp-ID: ARG / Beg label comp-ID: ARG / End auth comp-ID: ASP / End label comp-ID: ASP / Refine code: _ / Auth seq-ID: 213 - 702 / Label seq-ID: 30 - 519
NCS ensembles :
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Components
| #1: Protein | Mass: 63986.668 Da / Num. of mol.: 4 / Fragment: UNP residues 185-723 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: PKD2, TRPP2 / Plasmid: pFB-CT10HF-LIC / Production host: ![]() #2: Polysaccharide | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose Source method: isolated from a genetically manipulated source #3: Sugar | ChemComp-NAG / Has protein modification | Y | |
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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
| Component | Name: Polycystin-2 channel tetramer (residues 185-723) / Type: ORGANELLE OR CELLULAR COMPONENT / Entity ID: #1 / Source: RECOMBINANT | |||||||||||||||||||||||||
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| Molecular weight | Value: 0.256 MDa / Experimental value: NO | |||||||||||||||||||||||||
| Source (natural) | Organism: Homo sapiens (human) | |||||||||||||||||||||||||
| Source (recombinant) | Organism: ![]() | |||||||||||||||||||||||||
| Buffer solution | pH: 7.5 | |||||||||||||||||||||||||
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| Specimen | Conc.: 4.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: Sample was monodisperse after size exclusion chromatography | |||||||||||||||||||||||||
| Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: C-flat | |||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 90 % / Chamber temperature: 85 K Details: 3 microlitres were applied to the grid and blotted for 3secs prior to plunge in liquid ethane |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Tecnai Polara / Image courtesy: FEI Company |
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| Microscopy | Model: FEI POLARA 300 |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 37037 X / Nominal defocus max: 4500 nm / Nominal defocus min: 1100 nm / Cs: 2 mm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: SIDE ENTRY, EUCENTRIC |
| Image recording | Average exposure time: 8.8 sec. / Electron dose: 45.1 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 758 Details: Images were collected in movie-mode at 2.5 frames per second for a duration of 8.8secs |
| EM imaging optics | Energyfilter name: GIF Quantum / Energyfilter upper: 20 eV / Energyfilter lower: 0 eV |
| Image scans | Movie frames/image: 22 / Used frames/image: 1-22 |
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Processing
| Software | Name: REFMAC / Version: 5.8.0135 / Classification: refinement | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| CTF correction | Details: CTF correction as implemented in CTTFIND4/RELION / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 161965 Details: Particles were autopicked using CTF-corrected template based picking algorithm in RELION using selected 2D class averages based on manually picked particles. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: C4 (4 fold cyclic) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 4.22 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 19546 Details: Resolution determined by gold-standard FSC procedure as implemented in RELION Num. of class averages: 1 / Symmetry type: POINT | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: AB INITIO MODEL / Space: RECIPROCAL / Details: Model was built directly into map de novo | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refinement | Resolution: 4.22→4.22 Å / Cor.coef. Fo:Fc: 0.863 / SU B: 52.839 / SU ML: 0.629 Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
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| Solvent computation | Ion probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Displacement parameters | Biso mean: 118.923 Å2
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| Refinement step | Cycle: 1 / Total: 15680 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Refine LS restraints |
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Homo sapiens (human)
United Kingdom, 1items
Citation
UCSF Chimera







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