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Open data
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Basic information
| Entry | Database: PDB / ID: 9mxj | ||||||
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| Title | Human Vault Cage in complex with ADP-ribose | ||||||
Components | Major vault protein | ||||||
Keywords | PROTEIN TRANSPORT / Vault / Vault Cage / MVP / Major Vault Protein / SPFH / PARP4 / Poly(ADP-ribose)Polymerase 4 / MINT / NAD+ / NAD / Poly(ADP-ribose)Polymerase / Ribonucleoprotein / Megadalton complex / TEP1 / vault RNA | ||||||
| Function / homology | Function and homology informationnegative regulation of protein tyrosine kinase activity / protein activation cascade / negative regulation of protein autophosphorylation / ERBB signaling pathway / negative regulation of epidermal growth factor receptor signaling pathway / mRNA transport / nuclear pore / protein transport / secretory granule lumen / protein phosphatase binding ...negative regulation of protein tyrosine kinase activity / protein activation cascade / negative regulation of protein autophosphorylation / ERBB signaling pathway / negative regulation of epidermal growth factor receptor signaling pathway / mRNA transport / nuclear pore / protein transport / secretory granule lumen / protein phosphatase binding / ficolin-1-rich granule lumen / cytoskeleton / cell population proliferation / ribonucleoprotein complex / Neutrophil degranulation / protein kinase binding / perinuclear region of cytoplasm / extracellular exosome / extracellular region / identical protein binding / nucleus / membrane / cytoplasm / cytosol Similarity search - Function | ||||||
| Biological species | Homo sapiens (human) | ||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.49 Å | ||||||
Authors | Lodwick, J.E. / Zhao, M. | ||||||
| Funding support | United States, 1items
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Citation | Journal: Nat Commun / Year: 2025Title: Structural insights into the roles of PARP4 and NAD binding in the human vault cage. Authors: Jane E Lodwick / Rong Shen / Satchal Erramilli / Yuan Xie / Karolina Roganowicz / Simone Ritchey / Anthony A Kossiakoff / Minglei Zhao / ![]() Abstract: Vault is a massive ribonucleoprotein complex found across Eukaryota. The major vault protein (MVP) oligomerizes into an ovular cage, which contains several minor vault components (MVCs) and is ...Vault is a massive ribonucleoprotein complex found across Eukaryota. The major vault protein (MVP) oligomerizes into an ovular cage, which contains several minor vault components (MVCs) and is thought to transport transiently bound "cargo" molecules. Vertebrate vaults house a poly (ADP-ribose) polymerase (known as PARP4 in humans), which is the only MVC with known enzymatic activity. Despite being discovered decades ago, the molecular basis for PARP4's interaction with MVP remains unclear. In this study, we determined the structure of the human vault cage in complex with PARP4 and its enzymatic substrate NAD. The structures reveal atomic-level details of the protein-binding interface, as well as unexpected binding sites for NAD and related nucleotides within the interior of the vault cage. In addition, proteomics data show that human vaults purified from wild-type and PARP4-depleted cells interact with distinct subsets of proteins. Our results thereby support a model in which PARP4's specific incorporation into the vault cage helps to regulate vault's selection of cargo and its subcellular localization. Further, PARP4's proximity to MVP's NAD-binding sites could support its enzymatic function within the vault. | ||||||
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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 | 9mxj.cif.gz | 284 KB | Display | PDBx/mmCIF format |
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| PDB format | pdb9mxj.ent.gz | 228.4 KB | Display | PDB format |
| PDBx/mmJSON format | 9mxj.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9mxj_validation.pdf.gz | 1.2 MB | Display | wwPDB validaton report |
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| Full document | 9mxj_full_validation.pdf.gz | 1.3 MB | Display | |
| Data in XML | 9mxj_validation.xml.gz | 75.9 KB | Display | |
| Data in CIF | 9mxj_validation.cif.gz | 113.1 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/mx/9mxj ftp://data.pdbj.org/pub/pdb/validation_reports/mx/9mxj | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 48716MC ![]() 9bw5C ![]() 9bw6C ![]() 9bw7C 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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Assembly
| Deposited unit | ![]()
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| 1 | x 39![]()
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| 3 | ![]()
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| Symmetry | Point symmetry: (Schoenflies symbol: C39 (39 fold cyclic)) |
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Components
| #1: Protein | Mass: 99452.766 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Homo sapiens (human) / Gene: MVP, LRP / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q14764#2: Chemical | Has ligand of interest | Y | Has protein modification | N | |
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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: Binary complex of ADP-ribose bound to oligomerized human MVP Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT | |||||||||||||||||||||||||
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| Molecular weight | Value: 7.8 MDa / Experimental value: NO | |||||||||||||||||||||||||
| Source (natural) | Organism: Homo sapiens (human) | |||||||||||||||||||||||||
| Source (recombinant) | Organism: Trichoplusia ni (cabbage looper) | |||||||||||||||||||||||||
| Buffer solution | pH: 8 / Details: 50 mM HEPES, 5 mM MgCl2, 5 mM CaCl2, 0.25 mM DTT | |||||||||||||||||||||||||
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| Specimen | Conc.: 1.8 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES / Details: Sample was monodisperse. | |||||||||||||||||||||||||
| Specimen support | Grid material: COPPER / Grid mesh size: 200 divisions/in. / Grid type: Quantifoil R1.2/1.3 | |||||||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 281 K Details: Vitrification carried out under standard conditions |
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Electron microscopy imaging
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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| Microscopy | Model: TFS KRIOS / Details: Preliminary grid screening was performed manually. |
| Electron gun | Electron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 64000 X / Nominal defocus max: 1800 nm / Nominal defocus min: 600 nm / Cs: 2.7 mm |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Electron dose: 45 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 5780 Details: Images were collected in movie mode, with 40 frames per image. |
| EM imaging optics | Energyfilter name: GIF Bioquantum |
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Processing
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| CTF correction | Details: CTF correction was performed when movies were imported into cryoSPARC Live Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 363633 | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Symmetry | Point symmetry: D39 (2x39 fold dihedral) | ||||||||||||||||||||||||||||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.49 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 155096 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT / Space: REAL | ||||||||||||||||||||||||||||||||||||||||||||||||||
| Atomic model building | PDB-ID: 4v60 Accession code: 4v60 / Source name: PDB / Type: experimental model |
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About Yorodumi




Homo sapiens (human)
United States, 1items
Citation










PDBj




Trichoplusia ni (cabbage looper)

FIELD EMISSION GUN
