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Open data
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Basic information
| Entry | Database: EMDB / ID: EMD-9508 | |||||||||
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| Title | Cryo-EM map of the human 26S proteasome with C1 symmetry | |||||||||
Map data | overall map at 3.8A, apply C1 symmetry | |||||||||
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| Function / homology | Function and homology informationImpaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / thyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / integrator complex / proteasome accessory complex / meiosis I ...Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / thyrotropin-releasing hormone receptor binding / nuclear proteasome complex / host-mediated perturbation of viral transcription / positive regulation of inclusion body assembly / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / integrator complex / proteasome accessory complex / meiosis I / purine ribonucleoside triphosphate binding / proteasome regulatory particle / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome-activating activity / proteasome regulatory particle, lid subcomplex / proteasome regulatory particle, base subcomplex / protein K63-linked deubiquitination / metal-dependent deubiquitinase activity / negative regulation of programmed cell death / Regulation of ornithine decarboxylase (ODC) / Proteasome assembly / Cross-presentation of soluble exogenous antigens (endosomes) / proteasome core complex / Homologous DNA Pairing and Strand Exchange / Defective homologous recombination repair (HRR) due to BRCA1 loss of function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA1 binding function / Defective HDR through Homologous Recombination Repair (HRR) due to PALB2 loss of BRCA2/RAD51/RAD51C binding function / Somitogenesis / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / K63-linked deubiquitinase activity / Resolution of D-loop Structures through Holliday Junction Intermediates / proteasome binding / Impaired BRCA2 binding to RAD51 / transcription factor binding / regulation of protein catabolic process / myofibril / proteasome storage granule / Presynaptic phase of homologous DNA pairing and strand exchange / general transcription initiation factor binding / positive regulation of RNA polymerase II transcription preinitiation complex assembly / polyubiquitin modification-dependent protein binding / protein deubiquitination / blastocyst development / immune system process / NF-kappaB binding / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / endopeptidase activator activity / proteasome assembly / threonine-type endopeptidase activity / mRNA export from nucleus / proteasome core complex, alpha-subunit complex / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / enzyme regulator activity / ERAD pathway / regulation of proteasomal protein catabolic process / inclusion body / proteasome complex / : / TBP-class protein binding / sarcomere / Regulation of activated PAK-2p34 by proteasome mediated degradation / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / stem cell differentiation / Asymmetric localization of PCP proteins / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Ubiquitin-dependent degradation of Cyclin D / 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 / negative regulation of inflammatory response to antigenic stimulus / Degradation of DVL / Dectin-1 mediated noncanonical NF-kB signaling / P-body / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Degradation of AXIN / lipopolysaccharide binding / Hh mutants are degraded by ERAD / Activation of NF-kappaB in B cells / Degradation of GLI1 by the proteasome / G2/M Checkpoints / Hedgehog ligand biogenesis / Autodegradation of the E3 ubiquitin ligase COP1 / Defective CFTR causes cystic fibrosis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / Regulation of RUNX3 expression and activity / Negative regulation of NOTCH4 signaling / Hedgehog 'on' state / Vif-mediated degradation of APOBEC3G / APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1 / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / double-strand break repair via homologous recombination / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome Similarity search - Function | |||||||||
| Biological species | Homo sapiens (human) | |||||||||
| Method | single particle reconstruction / cryo EM / Resolution: 3.8 Å | |||||||||
Authors | Huang XL / Luan B / Wu JP / Shi YG | |||||||||
Citation | Journal: Nat Struct Mol Biol / Year: 2016Title: An atomic structure of the human 26S proteasome. Authors: Xiuliang Huang / Bai Luan / Jianping Wu / Yigong Shi / ![]() Abstract: We report the cryo-EM structure of the human 26S proteasome at an average resolution of 3.5 Å, allowing atomic modeling of 28 subunits in the core particle (CP) and 18 subunits in the regulatory ...We report the cryo-EM structure of the human 26S proteasome at an average resolution of 3.5 Å, allowing atomic modeling of 28 subunits in the core particle (CP) and 18 subunits in the regulatory particle (RP). The C-terminal residues of Rpt3 and Rpt5 subunits in the RP can be seen inserted into surface pockets formed between adjacent α subunits in the CP. Each of the six Rpt subunits contains a bound nucleotide, and the central gate of the CP α-ring is closed despite RP association. The six pore 1 loops in the Rpt ring are arranged similarly to a spiral staircase along the axial channel of substrate transport, which is constricted by the pore 2 loops. We also determined the cryo-EM structure of the human proteasome bound to the deubiquitinating enzyme USP14 at 4.35-Å resolution. Together, our structures provide a framework for mechanistic understanding of eukaryotic proteasome function. | |||||||||
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Structure visualization
| Movie |
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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_9508.map.gz | 479 MB | EMDB map data format | |
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| Header (meta data) | emd-9508-v30.xml emd-9508.xml | 13 KB 13 KB | Display Display | EMDB header |
| Images | emd_9508.png | 37.8 KB | ||
| Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-9508 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-9508 | HTTPS FTP |
-Validation report
| Summary document | emd_9508_validation.pdf.gz | 78.9 KB | Display | EMDB validaton report |
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| Full document | emd_9508_full_validation.pdf.gz | 78 KB | Display | |
| Data in XML | emd_9508_validation.xml.gz | 494 B | Display | |
| Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9508 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-9508 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 9507C ![]() 9509C ![]() 9510C ![]() 9511C ![]() 9512C ![]() 5gjqC ![]() 5gjrC C: citing same article ( |
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| Similar structure data |
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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_9508.map.gz / Format: CCP4 / Size: 512 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Annotation | overall map at 3.8A, apply C1 symmetry | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Voxel size | X=Y=Z: 1.07 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 26S proteasome
| Entire | Name: human 26S proteasome |
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| Components |
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-Supramolecule #1: human 26S proteasome
| Supramolecule | Name: human 26S proteasome / type: complex / ID: 1 / Parent: 0 Details: cryo-EM map of human 26S proteasome by single particle reconstruction |
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| Source (natural) | Organism: Homo sapiens (human) |
| Molecular weight | Theoretical: 2.5 MDa |
-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 | 1 mg/mL | ||||||||||||
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| Buffer | pH: 8 Component:
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| Grid | Material: COPPER / Support film - Material: CARBON / Support film - topology: CONTINUOUS / Support film - Film thickness: 3.0 nm / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR / Pretreatment - Pressure: 101.325 kPa | ||||||||||||
| Vitrification | Cryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 281 K / Instrument: FEI VITROBOT MARK IV / Details: blot for 2 seconds before plunging. | ||||||||||||
| Details | This sample was monodisperse. |
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Electron microscopy
| Microscope | FEI TITAN KRIOS |
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| Temperature | Min: 70.0 K |
| Details | Preliminary grid screening was performed manually |
| Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Digitization - Dimensions - Width: 4096 pixel / Digitization - Dimensions - Height: 4096 pixel / Digitization - Frames/image: 1-26 / Average exposure time: 1.6 sec. / Average electron dose: 37.0 e/Å2 |
| Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
| Electron optics | Calibrated defocus max: 0.0026 µm / Calibrated defocus min: 0.0016 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm |
| Sample stage | Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN |
| Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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