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Open data
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Basic information
Entry | Database: PDB / ID: 8ekw | ||||||
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Title | Cryo-EM structure of human PRDX4 | ||||||
![]() | Peroxiredoxin-4 | ||||||
![]() | OXIDOREDUCTASE | ||||||
Function / homology | ![]() cellular response to stress / negative regulation of male germ cell proliferation / I-kappaB phosphorylation / thioredoxin-dependent peroxiredoxin / molecular sequestering activity / thioredoxin peroxidase activity / protein maturation by protein folding / extracellular matrix organization / cell redox homeostasis / hydrogen peroxide catabolic process ...cellular response to stress / negative regulation of male germ cell proliferation / I-kappaB phosphorylation / thioredoxin-dependent peroxiredoxin / molecular sequestering activity / thioredoxin peroxidase activity / protein maturation by protein folding / extracellular matrix organization / cell redox homeostasis / hydrogen peroxide catabolic process / male gonad development / spermatogenesis / secretory granule lumen / ficolin-1-rich granule lumen / response to oxidative stress / molecular adaptor activity / Neutrophil degranulation / endoplasmic reticulum / extracellular exosome / extracellular region / identical protein binding / nucleus / cytosol Similarity search - Function | ||||||
Biological species | ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.83 Å | ||||||
![]() | Su, C.C. | ||||||
Funding support | ![]()
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![]() | ![]() Title: High-resolution structural-omics of human liver enzymes. Authors: Chih-Chia Su / Meinan Lyu / Zhemin Zhang / Masaru Miyagi / Wei Huang / Derek J Taylor / Edward W Yu / ![]() Abstract: We applied raw human liver microsome lysate to a holey carbon grid and used cryo-electron microscopy (cryo-EM) to define its composition. From this sample we identified and simultaneously determined ...We applied raw human liver microsome lysate to a holey carbon grid and used cryo-electron microscopy (cryo-EM) to define its composition. From this sample we identified and simultaneously determined high-resolution structural information for ten unique human liver enzymes involved in diverse cellular processes. Notably, we determined the structure of the endoplasmic bifunctional protein H6PD, where the N- and C-terminal domains independently possess glucose-6-phosphate dehydrogenase and 6-phosphogluconolactonase enzymatic activity, respectively. We also obtained the structure of heterodimeric human GANAB, an ER glycoprotein quality-control machinery that contains a catalytic α subunit and a noncatalytic β subunit. In addition, we observed a decameric peroxidase, PRDX4, which directly contacts a disulfide isomerase-related protein, ERp46. Structural data suggest that several glycosylations, bound endogenous compounds, and ions associate with these human liver enzymes. These results highlight the importance of cryo-EM in facilitating the elucidation of human organ proteomics at the atomic level. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 439.4 KB | Display | ![]() |
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PDB format | ![]() | 342.7 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 1.3 MB | Display | ![]() |
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Full document | ![]() | 1.3 MB | Display | |
Data in XML | ![]() | 59.3 KB | Display | |
Data in CIF | ![]() | 89.5 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 23432 ![]() 28214MC ![]() 7uzmC ![]() 8ekyC ![]() 8em2C ![]() 8emrC ![]() 8emsC ![]() 8emtC ![]() 8eneC ![]() 8eojC ![]() 8eorC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 30578.873 Da / Num. of mol.: 10 / Source method: isolated from a natural source / Source: (natural) ![]() #2: Water | ChemComp-HOH / | |
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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: H6PD / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Conc.: 0.5 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES Details: This is from a heterogeneous and impure protein sample. |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277 K |
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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: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2500 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 29 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 2.83 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 34192 / Symmetry type: POINT |
Atomic model building | Protocol: AB INITIO MODEL |