+Open data
-Basic information
Entry | Database: PDB / ID: 8gso | ||||||
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Title | AtOSCA3.1 channel extended state | ||||||
Components | CSC1-like protein ERD4 | ||||||
Keywords | MEMBRANE PROTEIN / channel | ||||||
Function / homology | Function and homology information plasmodesma / calcium-activated cation channel activity / chloroplast envelope / plant-type vacuole / mRNA binding / nucleus / plasma membrane Similarity search - Function | ||||||
Biological species | Arabidopsis thaliana (thale cress) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | ||||||
Authors | Zhang, M.F. | ||||||
Funding support | 1items
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Citation | Journal: Nat Commun / Year: 2023 Title: A mechanical-coupling mechanism in OSCA/TMEM63 channel mechanosensitivity. Authors: Mingfeng Zhang / Yuanyue Shan / Charles D Cox / Duanqing Pei / Abstract: Mechanosensitive (MS) ion channels are a ubiquitous type of molecular force sensor sensing forces from the surrounding bilayer. The profound structural diversity in these channels suggests that the ...Mechanosensitive (MS) ion channels are a ubiquitous type of molecular force sensor sensing forces from the surrounding bilayer. The profound structural diversity in these channels suggests that the molecular mechanisms of force sensing follow unique structural blueprints. Here we determine the structures of plant and mammalian OSCA/TMEM63 proteins, allowing us to identify essential elements for mechanotransduction and propose roles for putative bound lipids in OSCA/TMEM63 mechanosensation. Briefly, the central cavity created by the dimer interface couples each subunit and modulates dimeric OSCA/TMEM63 channel mechanosensitivity through the modulating lipids while the cytosolic side of the pore is gated by a plug lipid that prevents the ion permeation. Our results suggest that the gating mechanism of OSCA/TMEM63 channels may combine structural aspects of the 'lipid-gated' mechanism of MscS and TRAAK channels and the calcium-induced gating mechanism of the TMEM16 family, which may provide insights into the structural rearrangements of TMEM16/TMC superfamilies. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8gso.cif.gz | 251 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8gso.ent.gz | 200.8 KB | Display | PDB format |
PDBx/mmJSON format | 8gso.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/gs/8gso ftp://data.pdbj.org/pub/pdb/validation_reports/gs/8gso | HTTPS FTP |
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-Related structure data
Related structure data | 34237MC 8grnC 8groC 8grsC M: map data used to model this data C: citing same article (ref.) |
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Similar structure data | Similarity search - Function & homologyF&H Search |
-Links
-Assembly
Deposited unit |
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1 |
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-Components
#1: Protein | Mass: 82017.727 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Arabidopsis thaliana (thale cress) / Gene: ERD4, At1g30360, T4K22.4 / Production host: Homo sapiens (human) / References: UniProt: Q9C8G5 |
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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
Component | Name: AtOSCA3.1 channel extended state / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT |
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Source (natural) | Organism: Arabidopsis (plant) |
Source (recombinant) | Organism: Homo sapiens (human) |
Buffer solution | pH: 7.4 |
Specimen | Conc.: 5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
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: OTHER |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 3000 nm / Nominal defocus min: 1200 nm |
Image recording | Electron dose: 60 e/Å2 / Film or detector model: FEI FALCON III (4k x 4k) |
-Processing
CTF correction | Type: PHASE FLIPPING ONLY |
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3D reconstruction | Resolution: 3.3 Å / Resolution method: DIFFRACTION PATTERN/LAYERLINES / Num. of particles: 24800 / Symmetry type: POINT |