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Yorodumi- PDB-8tul: Cryo-EM structure of the human MRS2 magnesium channel under Mg2+ ... -
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-Basic information
Entry | Database: PDB / ID: 8tul | ||||||
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Title | Cryo-EM structure of the human MRS2 magnesium channel under Mg2+ condition | ||||||
Components | Magnesium transporter MRS2 homolog, mitochondrial | ||||||
Keywords | METAL TRANSPORT / Magnesium / Ion channel / Membrane protein / Ion Translocation / Divalent Ion / Pentamer | ||||||
Function / homology | mitochondrial magnesium ion transmembrane transport / Magnesium transporter MRS2-like / Miscellaneous transport and binding events / magnesium ion transmembrane transporter activity / lactate metabolic process / transmembrane transport / mitochondrial inner membrane / mitochondrion / Magnesium transporter MRS2 homolog, mitochondrial Function and homology information | ||||||
Biological species | Homo sapiens (human) | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å | ||||||
Authors | Lai, L.T.F. / Balaraman, J. / Zhou, F. / Matthies, D. | ||||||
Funding support | United States, 1items
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Citation | Journal: Nat Commun / Year: 2023 Title: Cryo-EM structures of human magnesium channel MRS2 reveal gating and regulatory mechanisms Authors: Lai, L.T.F. / Balaraman, J. / Zhou, F. / Matthies, D. | ||||||
History |
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-Structure visualization
Structure viewer | Molecule: MolmilJmol/JSmol |
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-Downloads & links
-Download
PDBx/mmCIF format | 8tul.cif.gz | 331.1 KB | Display | PDBx/mmCIF format |
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PDB format | pdb8tul.ent.gz | 265.7 KB | Display | PDB format |
PDBx/mmJSON format | 8tul.json.gz | Tree view | PDBx/mmJSON format | |
Others | Other downloads |
-Validation report
Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/tu/8tul ftp://data.pdbj.org/pub/pdb/validation_reports/tu/8tul | HTTPS FTP |
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-Related structure data
Related structure data | 41624MC 8tupC 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: 51373.516 Da / Num. of mol.: 5 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: MRS2 / Cell line (production host): Expi293F / Production host: Homo sapiens (human) / References: UniProt: Q9HD23 #2: Chemical | ChemComp-MG / #3: Water | ChemComp-HOH / | Has ligand of interest | 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 |
-Sample preparation
Component | Name: Cryo-EM structure of the pentameric human MRS2 magnesium channel under Mg2+ condition at an average resolution of 2.8 A, filtered to local resolution, C5 Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | ||||||||||||||||||||
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Molecular weight | Value: 0.219 MDa / Experimental value: NO | ||||||||||||||||||||
Source (natural) | Organism: Homo sapiens (human) | ||||||||||||||||||||
Source (recombinant) | Organism: Homo sapiens (human) / Cell: Expi293F / Plasmid: pCMV | ||||||||||||||||||||
Buffer solution | pH: 7.3 Details: 20 mM HEPES, 150 mM NaCl, 40 mM MgCl2, 0.003% LMNG, pH 7.3 | ||||||||||||||||||||
Buffer component |
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Specimen | Conc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: This sample was monodisperse | ||||||||||||||||||||
Specimen support | Grid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: Quantifoil R1.2/1.3 | ||||||||||||||||||||
Vitrification | Instrument: LEICA EM GP / Cryogen name: ETHANE / Humidity: 95 % / Chamber temperature: 277 K Details: 400-mesh R1.2/1.3 Cu grids (Quantifoil) were made hydrophilic by glow discharging for 60 seconds with a current of 15 mA in a PELCO easiGlow system. The cryo grids were produced using a ...Details: 400-mesh R1.2/1.3 Cu grids (Quantifoil) were made hydrophilic by glow discharging for 60 seconds with a current of 15 mA in a PELCO easiGlow system. The cryo grids were produced using a Leica EM GP2 (Leica). The chamber was kept at 4 C and set to 95% humidity. 3 microliter sample at 0.5 mg/ml was applied to a glow-discharged holey grid, blotted for 6 s, and plunge frozen into liquid ethane and stored in liquid nitrogen. |
-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 / Nominal magnification: 105000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 700 nm / Cs: 2.7 mm / C2 aperture diameter: 100 µm |
Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
Image recording | Average exposure time: 3.462 sec. / Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 3991 Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies ...Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies of 50 frames with a dose of 1 e-/A2 per frame (50 e-/A2 total dose) were recorded at a nominal magnification of 105,000x, corresponding to a physical pixel size of 0.83 A/px (super-resolution pixel size 0.415 A/px) in CDS mode at a dose rate of 10 e-/px/s and a defocus range of -0.7 to -2.0 um. In total, 3,991 and 9,656 movies were collected. |
EM imaging optics | Energyfilter name: GIF Bioquantum Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies ...Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies of 50 frames with a dose of 1 e-/A2 per frame (50 e-/A2 total dose) were recorded at a nominal magnification of 105,000x, corresponding to a physical pixel size of 0.83 A/px (super-resolution pixel size 0.415 A/px) in CDS mode at a dose rate of 10 e-/px/s and a defocus range of -0.7 to -2.0 um. In total, 3,991 and 9,656 movies were collected. Energyfilter slit width: 20 eV |
-Processing
EM software |
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Image processing | Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies ...Details: Cryo-EM datasets were acquired with SerialEM using a Titan Krios (FEI, now ThermoFisher Scientific) operated at 300 keV and equipped with an energy filter and K3 camera (Gatan Inc.). Movies of 50 frames with a dose of 1 e-/A2 per frame (50 e-/A2 total dose) were recorded at a nominal magnification of 105,000x, corresponding to a physical pixel size of 0.83 A/px (super-resolution pixel size 0.415 A/px) in CDS mode at a dose rate of 10 e-/px/s and a defocus range of -0.7 to -2.0 um. In total, 3,991 and 9,656 movies were collected. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
CTF correction | Details: Patch CTF / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 1568444 Details: Good 2D class averages generated from ~1,000 manually picked particles served as templates for automatic particle picking. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Symmetry | Point symmetry: C5 (5 fold cyclic) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 450554 / Algorithm: BACK PROJECTION Details: Non-uniform refinement was performed with 450,554 selected particles, followed by local motion correction and CTF refinement to correct for beam-tilt, spherical aberrations, and per-particle ...Details: Non-uniform refinement was performed with 450,554 selected particles, followed by local motion correction and CTF refinement to correct for beam-tilt, spherical aberrations, and per-particle defocus parameters. Non-uniform refinement with polished particles resulted in maps at 2.8 A (with C5 symmetry applied) and 3.1 A (with C1 symmetry applied), according to gold-standard FSC = 0.143 criterion. Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Atomic model building |
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Atomic model building |
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Refine LS restraints |
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