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Yorodumi- EMDB-2981: Cryo-EM reveals the conformation of a substrate analogue in the h... -
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Basic information
| Entry | Database: EMDB / ID: EMD-2981 | |||||||||
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| Title | Cryo-EM reveals the conformation of a substrate analogue in the human 20S proteasome core | |||||||||
Map data | reconstruction of the human 20S proteasome core, as determined by the 3D reconstitution algorithm, without further masking, sharpening or Fourier filtering | |||||||||
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Keywords | proteasome / 20S / human / AdaAhx3L3VS / ligand / inhibitor / drug design | |||||||||
| Function / homology | Function and homology informationpurine ribonucleoside triphosphate binding / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / myofibril / immune system process / NF-kappaB binding / proteasome endopeptidase complex ...purine ribonucleoside triphosphate binding / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Somitogenesis / myofibril / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / proteasome assembly / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / proteasome complex / proteolysis involved in protein catabolic process / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / Ubiquitin-dependent degradation of Cyclin D / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / TNFR2 non-canonical NF-kB pathway / AUF1 (hnRNP D0) binds and destabilizes mRNA / Vpu mediated degradation of CD4 / Assembly of the pre-replicative complex / Ubiquitin-Mediated Degradation of Phosphorylated Cdc25A / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / negative regulation of inflammatory response to antigenic stimulus / Degradation of AXIN / P-body / Hh mutants are degraded by ERAD / lipopolysaccharide binding / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Defective CFTR causes cystic fibrosis / Autodegradation of the E3 ubiquitin ligase COP1 / Negative regulation of NOTCH4 signaling / Regulation of RUNX3 expression and activity / Vif-mediated degradation of APOBEC3G / Hedgehog 'on' state / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / MAPK6/MAPK4 signaling / Degradation of beta-catenin by the destruction complex / Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha / ABC-family proteins mediated transport / CDK-mediated phosphorylation and removal of Cdc6 / CLEC7A (Dectin-1) signaling / SCF(Skp2)-mediated degradation of p27/p21 / response to virus / FCERI mediated NF-kB activation / Regulation of expression of SLITs and ROBOs / Regulation of PTEN stability and activity / nuclear matrix / Interleukin-1 signaling / Orc1 removal from chromatin / Regulation of RAS by GAPs / Regulation of RUNX2 expression and activity / The role of GTSE1 in G2/M progression after G2 checkpoint / Separation of Sister Chromatids / KEAP1-NFE2L2 pathway / UCH proteinases / Downstream TCR signaling / Antigen processing: Ubiquitination & Proteasome degradation / peptidase activity / RUNX1 regulates transcription of genes involved in differentiation of HSCs / Neddylation / ER-Phagosome pathway / regulation of inflammatory response / response to oxidative stress / secretory granule lumen / endopeptidase activity / ficolin-1-rich granule lumen / proteasome-mediated ubiquitin-dependent protein catabolic process / positive regulation of canonical NF-kappaB signal transduction / Ub-specific processing proteases / nuclear body / cilium / ciliary basal body / ribosome / cadherin binding / intracellular membrane-bounded organelle / ubiquitin protein ligase binding / Neutrophil degranulation / centrosome / mitochondrion / proteolysis / RNA binding / extracellular exosome / extracellular region Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.5 Å | |||||||||
Authors | da Fonseca PCA / Morris EP | |||||||||
Citation | Journal: Nat Commun / Year: 2015Title: Cryo-EM reveals the conformation of a substrate analogue in the human 20S proteasome core. Authors: Paula C A da Fonseca / Edward P Morris / ![]() Abstract: The proteasome is a highly regulated protease complex fundamental for cell homeostasis and controlled cell cycle progression. It functions by removing a wide range of specifically tagged proteins, ...The proteasome is a highly regulated protease complex fundamental for cell homeostasis and controlled cell cycle progression. It functions by removing a wide range of specifically tagged proteins, including key cellular regulators. Here we present the structure of the human 20S proteasome core bound to a substrate analogue inhibitor molecule, determined by electron cryo-microscopy (cryo-EM) and single-particle analysis at a resolution of around 3.5 Å. Our map allows the building of protein coordinates as well as defining the location and conformation of the inhibitor at the different active sites. These results open new prospects to tackle the proteasome functional mechanisms. Moreover, they also further demonstrate that cryo-EM is emerging as a realistic approach for general structural studies of protein-ligand interactions. | |||||||||
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Structure visualization
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| Structure viewer | EM map: SurfView Molmil Jmol/JSmol |
| Supplemental images |
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Downloads & links
-EMDB archive
| Map data | emd_2981.map.gz | 58.3 MB | EMDB map data format | |
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| Header (meta data) | emd-2981-v30.xml emd-2981.xml | 24.6 KB 24.6 KB | Display Display | EMDB header |
| Images | emd_2981.png | 152.2 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-2981 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-2981 | HTTPS FTP |
-Validation report
| Summary document | emd_2981_validation.pdf.gz | 314.1 KB | Display | EMDB validaton report |
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| Full document | emd_2981_full_validation.pdf.gz | 313.2 KB | Display | |
| Data in XML | emd_2981_validation.xml.gz | 6.3 KB | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2981 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-2981 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 5a0qMC M: atomic model generated by this map C: citing same article ( |
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| Similar structure data | |
| EM raw data | EMPIAR-10038 (Title: Cryo-EM reveals the conformation of a substrate analogue in the human 20S proteasome coreData size: 579.1 Data #1: raw micrographs of the human 20S proteasome core complex bound to the ligand AdaAhx3L3VS [micrographs - multiframe]) |
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Links
| EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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| Related items in Molecule of the Month |
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Map
| File | Download / File: emd_2981.map.gz / Format: CCP4 / Size: 62.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | reconstruction of the human 20S proteasome core, as determined by the 3D reconstitution algorithm, without further masking, sharpening or Fourier filtering | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.04 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Density |
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| Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
+Entire : human 20S proteasome core
+Supramolecule #1000: human 20S proteasome core
+Macromolecule #1: Proteasome subunit alpha type-6
+Macromolecule #2: Proteasome subunit alpha type-2
+Macromolecule #3: Proteasome subunit alpha type-4
+Macromolecule #4: Proteasome subunit alpha type-7
+Macromolecule #5: Proteasome subunit alpha type-5
+Macromolecule #6: Proteasome subunit alpha type-1
+Macromolecule #7: Proteasome subunit alpha type-3
+Macromolecule #8: Proteasome subunit beta type-6
+Macromolecule #9: Proteasome subunit beta type-7
+Macromolecule #10: Proteasome subunit beta type-3
+Macromolecule #11: Proteasome subunit beta type-2
+Macromolecule #12: Proteasome subunit beta type-5
+Macromolecule #13: Proteasome subunit beta type-1
+Macromolecule #14: Proteasome subunit beta type-4
-Experimental details
-Structure determination
| Method | cryo EM |
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Processing | single particle reconstruction |
| Aggregation state | particle |
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Sample preparation
| Concentration | 0.1 mg/mL |
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| Buffer | pH: 7.5 / Details: 50 mM Tris-HCl, 5 mM MgCl2 and 1mM dithiotreitol |
| Grid | Details: 1.2/1.3 Quantifoil coated with freshly floated thin layer of carbon, glow discharged in amylamine atmosphere |
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 120 K / Instrument: FEI VITROBOT MARK III / Method: blot 2.5 seconds before plunging |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Temperature | Average: 85 K |
| Alignment procedure | Legacy - Astigmatism: objective lens astigmatism was corrected at the recording magnification |
| Details | Each exposure was recorded as 17 individual frames captured at a rate of 0.056 second/frame, with an electron dose of 2.8 electrons/square angstrom. Data-set recorded using EPU software. |
| Date | Feb 4, 2014 |
| Image recording | Category: CCD / Film or detector model: FEI FALCON II (4k x 4k) / Digitization - Sampling interval: 14 µm / Number real images: 960 / Average electron dose: 48 e/Å2 Details: each image is the sum of 17 frames recorded by the direct electron detector |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Calibrated magnification: 134461 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 3.0 µm / Nominal defocus min: 1.7 µm / Nominal magnification: 75000 |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
| Details | automatic particle picking followed by careful manual removal of false positives and addition of false negatives; high resolution analysis was done using the sum of frames 3-10 |
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| CTF correction | Details: full recorded image |
| Final reconstruction | Applied symmetry - Point group: C2 (2 fold cyclic) / Algorithm: OTHER / Resolution.type: BY AUTHOR / Resolution: 3.5 Å / Resolution method: OTHER / Software - Name: Spider, Tigris, Imagic Details: the analysis was done using a data-set recorded during a single EM session Number images used: 76500 |
| Final angle assignment | Details: Beta 0 degrees, gamma 90 degrees (IMAGIC) |
-Atomic model buiding 1
| Initial model | PDB ID: Chain - #0 - Chain ID: A / Chain - #1 - Chain ID: B / Chain - #2 - Chain ID: C / Chain - #3 - Chain ID: D / Chain - #4 - Chain ID: E / Chain - #5 - Chain ID: F / Chain - #6 - Chain ID: G / Chain - #7 - Chain ID: H / Chain - #8 - Chain ID: I / Chain - #9 - Chain ID: J / Chain - #10 - Chain ID: K / Chain - #11 - Chain ID: L / Chain - #12 - Chain ID: M / Chain - #13 - Chain ID: N / Chain - #14 - Chain ID: O / Chain - #15 - Chain ID: P / Chain - #16 - Chain ID: Q / Chain - #17 - Chain ID: R / Chain - #18 - Chain ID: S / Chain - #19 - Chain ID: T / Chain - #20 - Chain ID: U / Chain - #21 - Chain ID: V / Chain - #22 - Chain ID: W / Chain - #23 - Chain ID: X / Chain - #24 - Chain ID: Y / Chain - #25 - Chain ID: Z / Chain - #26 - Chain ID: a / Chain - #27 - Chain ID: b |
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| Software | Name: Coot, Phenix |
| Details | The model of the human 20S proteasome core was built based on the X-ray crystal structure of the mouse constitutive apo 20S proteasome core (3UNE) using real space refinement in Coot and Phenix |
| Refinement | Space: REAL / Protocol: FLEXIBLE FIT |
| Output model | ![]() PDB-5a0q: |
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Keywords
Homo sapiens (human)
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