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Open data
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Basic information
| Entry | Database: PDB / ID: 9e7l | |||||||||||||||||||||||||||
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| Title | Yeast V-ATPase Vo proton channel bound to nanobody 2WVA7 | |||||||||||||||||||||||||||
 Components | 
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 Keywords | PROTON TRANSPORT / Vacuolar ATPase / Vo proton channel / lipid nanodisc / nanobody | |||||||||||||||||||||||||||
| Function / homology |  Function and homology informationcell wall mannoprotein biosynthetic process / protein localization to vacuolar membrane / ATPase-coupled ion transmembrane transporter activity / cellular response to alkaline pH / Insulin receptor recycling / Transferrin endocytosis and recycling / polyphosphate metabolic process / ROS and RNS production in phagocytes / Amino acids regulate mTORC1 / Golgi lumen acidification ...cell wall mannoprotein biosynthetic process / protein localization to vacuolar membrane / ATPase-coupled ion transmembrane transporter activity / cellular response to alkaline pH / Insulin receptor recycling / Transferrin endocytosis and recycling / polyphosphate metabolic process / ROS and RNS production in phagocytes / Amino acids regulate mTORC1 / Golgi lumen acidification / P-type proton-exporting transporter activity / vacuolar transport / vacuolar proton-transporting V-type ATPase, V0 domain / endosomal lumen acidification / vacuole organization / protein targeting to vacuole / proton-transporting V-type ATPase complex / fungal-type vacuole / vacuolar proton-transporting V-type ATPase complex / cellular hyperosmotic response / vacuolar acidification / fungal-type vacuole membrane / phosphatidylinositol-3,5-bisphosphate binding / proton transmembrane transporter activity / proton-transporting ATPase activity, rotational mechanism / intracellular copper ion homeostasis / Neutrophil degranulation / RNA endonuclease activity / proton transmembrane transport / cell periphery / transmembrane transport / endocytosis / ATPase binding / protein-containing complex assembly / intracellular iron ion homeostasis / membrane raft / Golgi membrane / endoplasmic reticulum membrane / membrane Similarity search - Function  | |||||||||||||||||||||||||||
| Biological species | ![]() ![]()  | |||||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.33 Å | |||||||||||||||||||||||||||
 Authors | Wilkens, S. / Knight, K. / Roh, S.-H. / Park, J.B. | |||||||||||||||||||||||||||
| Funding support |   United States,   Korea, Republic Of, 4items 
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 Citation |  Journal: bioRxiv / Year: 2025Title: Monoclonal nanobodies alter the activity and assembly of the yeast vacuolar H-ATPase. Authors: Kassidy Knight / Jun Bae Park / Rebecca A Oot / Md Murad Khan / Soung-Hun Roh / Stephan Wilkens /   ![]() Abstract: The vacuolar ATPase (V-ATPase; VV) is a multi-subunit rotary nanomotor proton pump that acidifies organelles in virtually all eukaryotic cells, and extracellular spaces in some specialized tissues of ...The vacuolar ATPase (V-ATPase; VV) is a multi-subunit rotary nanomotor proton pump that acidifies organelles in virtually all eukaryotic cells, and extracellular spaces in some specialized tissues of higher organisms. Evidence suggests that metastatic breast cancers mislocalize V-ATPase to the plasma membrane to promote cell survival and facilitate metastasis, making the V-ATPase a potential drug target. We have generated a library of camelid single-domain antibodies (Nanobodies; Nbs) against lipid-nanodisc reconstituted yeast V-ATPase V proton channel subcomplex. Here, we present an in-depth characterization of three anti-V Nbs using biochemical and biophysical experiments. We find that the Nbs bind V with high affinity, with one Nb inhibiting holoenzyme activity and another one preventing enzyme assembly. Using cryoEM, we find that two of the Nbs bind the subunit ring of the V on the lumen side of the complex. Additionally, we show that one of the Nbs raised against yeast V can pull down human V-ATPase (VV). Our research demonstrates Nb versatility to target and modulate the activity of the V-ATPase, and highlights the potential for future therapeutic Nb development.  | |||||||||||||||||||||||||||
| History | 
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Structure visualization
| Structure viewer | Molecule:  Molmil Jmol/JSmol | 
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Downloads & links
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Download
| PDBx/mmCIF format |  9e7l.cif.gz | 1.3 MB | Display |  PDBx/mmCIF format | 
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| PDB format |  pdb9e7l.ent.gz | 1.1 MB | Display |  PDB format | 
| PDBx/mmJSON format |  9e7l.json.gz | Tree view |  PDBx/mmJSON format | |
| Others |  Other downloads | 
-Validation report
| Summary document |  9e7l_validation.pdf.gz | 1.5 MB | Display |  wwPDB validaton report | 
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| Full document |  9e7l_full_validation.pdf.gz | 1.5 MB | Display | |
| Data in XML |  9e7l_validation.xml.gz | 97.8 KB | Display | |
| Data in CIF |  9e7l_validation.cif.gz | 155.9 KB | Display | |
| Arichive directory |  https://data.pdbj.org/pub/pdb/validation_reports/e7/9e7l ftp://data.pdbj.org/pub/pdb/validation_reports/e7/9e7l | HTTPS FTP  | 
-Related structure data
| Related structure data | ![]() 47679MC ![]() 9e76C ![]() 9mj4C C: citing same article ( M: map data used to model this data  | 
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| Similar structure data | Similarity search - Function & homology  F&H Search | 
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Links
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Assembly
| Deposited unit | ![]() 
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| 1 | 
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Components
-V-type proton ATPase subunit  ... , 6 types, 13 molecules BCDFGHIJKLEMA            
| #1: Protein |   Mass: 39822.484 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]()  | ||||
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| #2: Protein |   Mass: 22610.641 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]()  | ||||
| #3: Protein |   Mass: 17046.361 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]()  | ||||
| #5: Protein | Mass: 16357.501 Da / Num. of mol.: 8 / Source method: isolated from a natural source / Source: (natural)  ![]() #6: Protein |   | Mass: 8387.065 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]() #9: Protein |   | Mass: 95625.484 Da / Num. of mol.: 1 / Mutation: C-terminal calmodulin binding peptide / Source method: isolated from a natural source / Source: (natural)  ![]()  | 
-Protein , 2 types, 2 molecules NO 
| #7: Protein |   Mass: 29694.885 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]()  | 
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| #8: Protein |   Mass: 9369.934 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural)  ![]()  | 
-Antibody , 1 types, 8 molecules XWVUTSRQ       
| #4: Antibody | Mass: 14916.397 Da / Num. of mol.: 8 / Mutation: N-terminal pelB leader sequence Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]()  | 
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-Details
| 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: Yeast V-ATPase Vo proton channel bound to nanobody 2WVA7 Type: COMPLEX / Entity ID: all / Source: NATURAL  | 
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| Molecular weight | Value: 0.540 MDa / Experimental value: NO | 
| Source (natural) | Organism: ![]()  | 
| Buffer solution | pH: 7.4 | 
| Specimen | Conc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | 
| Specimen support | Grid material: GOLD / Grid type: Au-flat 1.2/1.3 | 
| Vitrification | Instrument: HOMEMADE PLUNGER / Cryogen name: ETHANE | 
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Electron microscopy imaging
| Microscopy | Model: TFS GLACIOS | 
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| Electron gun | Electron source:  FIELD EMISSION GUN / Accelerating voltage: 200 kV / Illumination mode: FLOOD BEAM | 
| Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1300 nm | 
| Image recording | Electron dose: 39.96 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k) | 
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Processing
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.33 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 53956 / Symmetry type: POINT | ||||||||||||||||||||||||
| Refine LS restraints | 
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FIELD EMISSION GUN