+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-31541 | ||||||||||||
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Title | CryoEM Structures of Reconstituted V-ATPase, Oxr1 bound V1 | ||||||||||||
Map data | |||||||||||||
Sample |
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Keywords | ATPase / proton pump / rotary motor enzyme / membrane protein / MOTOR PROTEIN | ||||||||||||
Function / homology | Function and homology information vacuole-mitochondrion membrane contact site / protein retention in Golgi apparatus / protein-containing complex disassembly / Insulin receptor recycling / Transferrin endocytosis and recycling / ROS and RNS production in phagocytes / Amino acids regulate mTORC1 / Golgi lumen acidification / proteasome storage granule assembly / pexophagy ...vacuole-mitochondrion membrane contact site / protein retention in Golgi apparatus / protein-containing complex disassembly / Insulin receptor recycling / Transferrin endocytosis and recycling / ROS and RNS production in phagocytes / Amino acids regulate mTORC1 / Golgi lumen acidification / proteasome storage granule assembly / pexophagy / endosomal lumen acidification / vacuolar proton-transporting V-type ATPase, V1 domain / vacuolar proton-transporting V-type ATPase complex / proton-transporting V-type ATPase complex / vacuolar acidification / fungal-type vacuole membrane / ATP metabolic process / Neutrophil degranulation / proton-transporting ATPase activity, rotational mechanism / proton transmembrane transport / transmembrane transport / intracellular calcium ion homeostasis / cytoplasmic stress granule / response to oxidative stress / membrane raft / Golgi membrane / mitochondrion / ATP binding / membrane / nucleus / cytoplasm Similarity search - Function | ||||||||||||
Biological species | Saccharomyces cerevisiae S288c (yeast) / Saccharomyces cerevisiae S288C (yeast) | ||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | ||||||||||||
Authors | Khan MM / Lee S | ||||||||||||
Funding support | United States, 3 items
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Citation | Journal: EMBO J / Year: 2022 Title: Oxidative stress protein Oxr1 promotes V-ATPase holoenzyme disassembly in catalytic activity-independent manner. Authors: Md Murad Khan / Seowon Lee / Sergio Couoh-Cardel / Rebecca A Oot / Hyunmin Kim / Stephan Wilkens / Soung-Hun Roh / Abstract: The vacuolar ATPase (V-ATPase) is a rotary motor proton pump that is regulated by an assembly equilibrium between active holoenzyme and autoinhibited V -ATPase and V proton channel subcomplexes. ...The vacuolar ATPase (V-ATPase) is a rotary motor proton pump that is regulated by an assembly equilibrium between active holoenzyme and autoinhibited V -ATPase and V proton channel subcomplexes. Here, we report cryo-EM structures of yeast V-ATPase assembled in vitro from lipid nanodisc reconstituted V and mutant V . Our analysis identified holoenzymes in three active rotary states, indicating that binding of V to V provides sufficient free energy to overcome V autoinhibition. Moreover, the structures suggest that the unequal spacing of V 's proton-carrying glutamic acid residues serves to alleviate the symmetry mismatch between V and V motors, a notion that is supported by mutagenesis experiments. We also uncover a structure of free V bound to Oxr1, a conserved but poorly characterized factor involved in the oxidative stress response. Biochemical experiments show that Oxr1 inhibits V -ATPase and causes disassembly of the holoenzyme, suggesting that Oxr1 plays a direct role in V-ATPase regulation. | ||||||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_31541.map.gz | 185.5 MB | EMDB map data format | |
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Header (meta data) | emd-31541-v30.xml emd-31541.xml | 21.7 KB 21.7 KB | Display Display | EMDB header |
Images | emd_31541.png | 175.6 KB | ||
Filedesc metadata | emd-31541.cif.gz | 7.6 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-31541 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-31541 | HTTPS FTP |
-Validation report
Summary document | emd_31541_validation.pdf.gz | 554.9 KB | Display | EMDB validaton report |
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Full document | emd_31541_full_validation.pdf.gz | 554.5 KB | Display | |
Data in XML | emd_31541_validation.xml.gz | 7.3 KB | Display | |
Data in CIF | emd_31541_validation.cif.gz | 8.3 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31541 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-31541 | HTTPS FTP |
-Related structure data
Related structure data | 7fdeMC 7fdaC 7fdbC 7fdcC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_31541.map.gz / Format: CCP4 / Size: 244.1 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
+Entire : Oxr1 bound V1 subcomplex of Yeast Vacuolar ATPase
+Supramolecule #1: Oxr1 bound V1 subcomplex of Yeast Vacuolar ATPase
+Supramolecule #2: Yeast Vacuolar ATPase subunit C
+Supramolecule #3: Yeast V-type proton ATPase subunits
+Macromolecule #1: V-type proton ATPase subunit C
+Macromolecule #2: V-type proton ATPase subunit E
+Macromolecule #3: V-type proton ATPase subunit G
+Macromolecule #4: Yeast Vacuolar ATPase A subunit
+Macromolecule #5: V-type proton ATPase subunit B
+Macromolecule #6: V-type proton ATPase subunit D
+Macromolecule #7: V-type proton ATPase subunit F
+Macromolecule #8: Oxidation resistance protein 1
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Concentration | 1 mg/mL |
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Buffer | pH: 7.4 |
Grid | Model: UltrAuFoil / Material: GOLD / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 20 sec. / Pretreatment - Atmosphere: AIR |
Vitrification | Cryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 277 K / Instrument: HOMEMADE PLUNGER |
-Electron microscopy
Microscope | TFS KRIOS |
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Specialist optics | Energy filter - Name: GIF Bioquantum / Energy filter - Slit width: 20 eV |
Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Number real images: 20447 / Average exposure time: 10.0 sec. / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
Startup model | Type of model: INSILICO MODEL |
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Final reconstruction | Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 3.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 20447 |
Initial angle assignment | Type: MAXIMUM LIKELIHOOD |
Final angle assignment | Type: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC |
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: FLEXIBLE FIT |
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Output model | PDB-7fde: |