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- EMDB-8334: Structural basis for dynamic regulation of the human 26S proteasome -

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Basic information

Entry
Database: EMDB / ID: EMD-8334
TitleStructural basis for dynamic regulation of the human 26S proteasome
Map dataThe human half 26S proteasome reconstruction in the SA state, focusing on the individual regulatory particle, from 139236 particles of half 26S
Sample
  • Complex: 26S proteasome holoenzymeProteasome
Function / homology
Function and homology information


positive regulation of inclusion body assembly / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / thyrotropin-releasing hormone receptor binding / modulation by host of viral transcription / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / meiosis I / positive regulation of proteasomal protein catabolic process / metal-dependent deubiquitinase activity ...positive regulation of inclusion body assembly / Impaired BRCA2 translocation to the nucleus / Impaired BRCA2 binding to SEM1 (DSS1) / thyrotropin-releasing hormone receptor binding / modulation by host of viral transcription / Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases / proteasome accessory complex / meiosis I / positive regulation of proteasomal protein catabolic process / metal-dependent deubiquitinase activity / proteasome regulatory particle / purine ribonucleoside triphosphate binding / cytosolic proteasome complex / proteasome regulatory particle, lid subcomplex / proteasome-activating activity / proteasome regulatory particle, base subcomplex / protein K63-linked deubiquitination / negative regulation of programmed cell death / regulation of endopeptidase activity / 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 / Homologous DNA Pairing and Strand Exchange / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Resolution of D-loop Structures through Holliday Junction Intermediates / Cross-presentation of soluble exogenous antigens (endosomes) / Somitogenesis / Impaired BRCA2 binding to RAD51 / K63-linked deubiquitinase activity / immune system process / myofibril / proteasome binding / regulation of protein catabolic process / proteasome storage granule / Presynaptic phase of homologous DNA pairing and strand exchange / blastocyst development / transcription factor binding / polyubiquitin modification-dependent protein binding / general transcription initiation factor binding / endopeptidase activator activity / NF-kappaB binding / proteasome assembly / proteasome endopeptidase complex / positive regulation of RNA polymerase II transcription preinitiation complex assembly / proteasome core complex, beta-subunit complex / proteasome core complex, alpha-subunit complex / threonine-type endopeptidase activity / regulation of proteasomal protein catabolic process / enzyme regulator activity / mRNA export from nucleus / inclusion body / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / : / negative regulation of inflammatory response to antigenic stimulus / : / response to organonitrogen compound / sarcomere / proteolysis involved in protein catabolic process / proteasome complex / Regulation of activated PAK-2p34 by proteasome mediated degradation / ciliary basal body / N-glycan trimming in the ER and Calnexin/Calreticulin cycle / Autodegradation of Cdh1 by Cdh1:APC/C / APC/C:Cdc20 mediated degradation of Securin / Asymmetric localization of PCP proteins / SCF-beta-TrCP mediated degradation of Emi1 / NIK-->noncanonical NF-kB signaling / Ubiquitin-dependent degradation of Cyclin D / AUF1 (hnRNP D0) binds and destabilizes mRNA / Degradation of DVL / TNFR2 non-canonical NF-kB pathway / Assembly of the pre-replicative complex / Vpu mediated degradation of CD4 / proteasomal protein catabolic process / stem cell differentiation / P-body / Ubiquitin Mediated Degradation of Phosphorylated Cdc25A / Dectin-1 mediated noncanonical NF-kB signaling / Hh mutants are degraded by ERAD / Cdc20:Phospho-APC/C mediated degradation of Cyclin A / Degradation of GLI1 by the proteasome / lipopolysaccharide binding / Degradation of AXIN / Defective CFTR causes cystic fibrosis / Activation of NF-kappaB in B cells / Negative regulation of NOTCH4 signaling / Hedgehog ligand biogenesis / GSK3B and BTRC:CUL1-mediated-degradation of NFE2L2 / double-strand break repair via homologous recombination / Vif-mediated degradation of APOBEC3G / G2/M Checkpoints / Hedgehog 'on' state / Autodegradation of the E3 ubiquitin ligase COP1 / Degradation of GLI2 by the proteasome / GLI3 is processed to GLI3R by the proteasome / Regulation of RUNX3 expression and activity / FBXL7 down-regulates AURKA during mitotic entry and in early mitosis / response to virus
Similarity search - Function
Ubiquitin interaction motif / 26S proteasome regulatory subunit RPN7/PSMD6 C-terminal helix / 26S proteasome non-ATPase regulatory subunit Rpn12 / 26S proteasome regulatory subunit, C-terminal / Proteasome regulatory subunit C-terminal / DSS1/SEM1 / 26S proteasome regulatory subunit RPN5, C-terminal domain / : / DSS1/SEM1 family / 26S proteasome regulatory subunit RPN5 C-terminal domain ...Ubiquitin interaction motif / 26S proteasome regulatory subunit RPN7/PSMD6 C-terminal helix / 26S proteasome non-ATPase regulatory subunit Rpn12 / 26S proteasome regulatory subunit, C-terminal / Proteasome regulatory subunit C-terminal / DSS1/SEM1 / 26S proteasome regulatory subunit RPN5, C-terminal domain / : / DSS1/SEM1 family / 26S proteasome regulatory subunit RPN5 C-terminal domain / 26S proteasome subunit RPN2, N-terminal domain / DSS1_SEM1 / 26S proteasome regulatory subunit Rpn6, N-terminal / 6S proteasome subunit Rpn6, C-terminal helix domain / 26S proteasome regulatory subunit RPN6 N-terminal domain / 26S proteasome subunit RPN6 C-terminal helix domain / 26S proteasome regulatory complex, non-ATPase subcomplex, Rpn2/Psmd1 subunit / 26S Proteasome non-ATPase regulatory subunit 13 / 26S proteasome regulatory subunit RPN2, C-terminal / 26S proteasome regulatory subunit RPN2 C-terminal domain / 26S Proteasome non-ATPase regulatory subunit 7/8 / Proteasome subunit Rpn10 / : / 26S proteasome regulatory subunit 7, OB domain / 26S proteasome regulatory complex, non-ATPase subcomplex, Rpn1 subunit / RPN1, N-terminal / 26S proteasome non-ATPase regulatory subunit RPN1, C-terminal / RPN1 N-terminal domain / 26S proteasome non-ATPase regulatory subunit RPN1 C-terminal / 26S proteasome regulatory subunit Rpn7, N-terminal / 26S proteasome regulatory subunit Rpn7/COP9 signalosome complex subunit 1 / 26S proteasome subunit RPN7 / 26S Proteasome non-ATPase regulatory subunit 12/COP9 signalosome complex subunit 4 / Proteasome/cyclosome repeat / Proteasome/cyclosome repeat / Ubiquitin-interacting motif. / PCI/PINT associated module / von Willebrand factor type A domain / Proteasome subunit alpha 1 / CSN8/PSMD8/EIF3K / CSN8/PSMD8/EIF3K family / HEAT repeats / Rpn11/EIF3F, C-terminal / Maintenance of mitochondrial structure and function / Proteasomal ATPase OB C-terminal domain / Proteasomal ATPase OB C-terminal domain / motif in proteasome subunits, Int-6, Nip-1 and TRIP-15 / PCI domain / Proteasome component (PCI) domain / PCI domain profile. / Ubiquitin interacting motif / Ubiquitin-interacting motif (UIM) domain profile. / JAB1/Mov34/MPN/PAD-1 ubiquitin protease / Proteasome beta subunit, C-terminal / Proteasome beta subunits C terminal / Proteasome subunit beta 4 / Proteasome subunit beta 2 / Proteasome beta 3 subunit / Proteasome subunit alpha6 / Proteasome subunit alpha5 / Proteasome beta-type subunits signature. / Peptidase T1A, proteasome beta-subunit / Proteasome beta-type subunit, conserved site / Proteasome subunit A N-terminal signature / Proteasome alpha-type subunits signature. / Proteasome alpha-subunit, N-terminal domain / Proteasome subunit A N-terminal signature Add an annotation / Proteasome alpha-type subunit / Proteasome alpha-type subunit profile. / von Willebrand factor (vWF) type A domain / Proteasome B-type subunit / Proteasome beta-type subunit profile. / VWFA domain profile. / Proteasome subunit / Proteasome, subunit alpha/beta / von Willebrand factor, type A / AAA ATPase, AAA+ lid domain / AAA+ lid domain / ATPase, AAA-type, conserved site / AAA-protein family signature. / JAB/MPN domain / JAB1/MPN/MOV34 metalloenzyme domain / MPN domain / MPN domain profile. / Nucleophile aminohydrolases, N-terminal / von Willebrand factor A-like domain superfamily / ATPase family associated with various cellular activities (AAA) / ATPase, AAA-type, core / Armadillo-like helical / Tetratricopeptide-like helical domain superfamily / Armadillo-type fold / Winged helix DNA-binding domain superfamily / Winged helix-like DNA-binding domain superfamily / ATPases associated with a variety of cellular activities / AAA+ ATPase domain / Nucleic acid-binding, OB-fold / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Proteasome 26S subunit, ATPase 6 / 26S proteasome non-ATPase regulatory subunit 11 / 26S proteasome non-ATPase regulatory subunit 12 / 26S proteasome non-ATPase regulatory subunit 14 / Proteasome subunit alpha type-7 / 26S proteasome non-ATPase regulatory subunit 3 / 26S proteasome regulatory subunit 6A / Proteasome subunit beta type-1 / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 ...Proteasome 26S subunit, ATPase 6 / 26S proteasome non-ATPase regulatory subunit 11 / 26S proteasome non-ATPase regulatory subunit 12 / 26S proteasome non-ATPase regulatory subunit 14 / Proteasome subunit alpha type-7 / 26S proteasome non-ATPase regulatory subunit 3 / 26S proteasome regulatory subunit 6A / Proteasome subunit beta type-1 / Proteasome subunit alpha type-1 / Proteasome subunit alpha type-2 / Proteasome subunit alpha type-3 / Proteasome subunit alpha type-4 / Proteasome subunit alpha type-5 / Proteasome subunit beta type-4 / Proteasome subunit beta type-6 / Proteasome subunit beta type-5 / 26S proteasome regulatory subunit 7 / 26S proteasome regulatory subunit 6B / 26S proteasome non-ATPase regulatory subunit 8 / Proteasome subunit beta type-3 / Proteasome subunit beta type-2 / 26S proteasome non-ATPase regulatory subunit 7 / 26S proteasome non-ATPase regulatory subunit 4 / 26S proteasome complex subunit SEM1 / Proteasome subunit alpha type-6 / 26S proteasome regulatory subunit 4 / 26S proteasome regulatory subunit 8 / 26S proteasome regulatory subunit 10B / 26S proteasome non-ATPase regulatory subunit 2 / 26S proteasome non-ATPase regulatory subunit 6 / Proteasome subunit beta type-7 / 26S proteasome non-ATPase regulatory subunit 1 / 26S proteasome non-ATPase regulatory subunit 13
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.4 Å
AuthorsChen S / Wu J / Lu Y / Ma YB / Lee BH / Yu Z / Ouyang Q / Finley D / Kirschner MW / Mao Y
CitationJournal: Proc Natl Acad Sci U S A / Year: 2016
Title: Structural basis for dynamic regulation of the human 26S proteasome.
Authors: Shuobing Chen / Jiayi Wu / Ying Lu / Yong-Bei Ma / Byung-Hoon Lee / Zhou Yu / Qi Ouyang / Daniel J Finley / Marc W Kirschner / Youdong Mao /
Abstract: The proteasome is the major engine of protein degradation in all eukaryotic cells. At the heart of this machine is a heterohexameric ring of AAA (ATPases associated with diverse cellular activities) ...The proteasome is the major engine of protein degradation in all eukaryotic cells. At the heart of this machine is a heterohexameric ring of AAA (ATPases associated with diverse cellular activities) proteins that unfolds ubiquitylated target proteins that are concurrently translocated into a proteolytic chamber and degraded into peptides. Using cryoelectron microscopy, we determined a near-atomic-resolution structure of the 2.5-MDa human proteasome in its ground state, as well as subnanometer-resolution structures of the holoenzyme in three alternative conformational states. The substrate-unfolding AAA-ATPase channel is narrowed by 10 inward-facing pore loops arranged into two helices that run in parallel with each other, one hydrophobic in character and the other highly charged. The gate of the core particle was unexpectedly found closed in the ground state and open in only one of the alternative states. Coordinated, stepwise conformational changes of the regulatory particle couple ATP hydrolysis to substrate translocation and regulate gating of the core particle, leading to processive degradation.
History
DepositionAug 15, 2016-
Header (metadata) releaseOct 19, 2016-
Map releaseOct 19, 2016-
UpdateJul 18, 2018-
Current statusJul 18, 2018Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0033
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.0033
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5t0g
  • Surface level: 0.0033
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

Downloads & links

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Map

FileDownload / File: emd_8334.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationThe human half 26S proteasome reconstruction in the SA state, focusing on the individual regulatory particle, from 139236 particles of half 26S
Voxel sizeX=Y=Z: 0.86 Å
Density
Contour LevelBy AUTHOR: 0.0033 / Movie #1: 0.0033
Minimum - Maximum-0.00408617 - 0.009515362
Average (Standard dev.)-0.000012588104 (±0.0008390109)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 309.6 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.860.860.86
M x/y/z360360360
origin x/y/z0.0000.0000.000
length x/y/z309.600309.600309.600
α/β/γ90.00090.00090.000
start NX/NY/NZ-152-37
NX/NY/NZ998271
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS360360360
D min/max/mean-0.0040.010-0.000

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Supplemental data

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Sample components

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Entire : 26S proteasome holoenzyme

EntireName: 26S proteasome holoenzymeProteasome
Components
  • Complex: 26S proteasome holoenzymeProteasome

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Supramolecule #1: 26S proteasome holoenzyme

SupramoleculeName: 26S proteasome holoenzyme / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)
Molecular weightExperimental: 2.5 MDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration1.5 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
50.0 mMC4H12ClNO3Tris-HClTris
1.0 mMMgCl2magnesium chloride
3.0 mMATPAdenosine triphosphate
0.5 mMTCEP
0.005 %NP-40
GridModel: C-Flat R1/1 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY ARRAY / Support film - Film thickness: 50.0 nm / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV / Details: blotted for 2 seconds, blotting force 3.

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Electron microscopy

MicroscopeFEI TECNAI ARCTICA
Electron beamAcceleration voltage: 200 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated magnification: 28736 / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Cs: 2.7 mm / Nominal defocus max: -3.0 µm / Nominal defocus min: -1.0 µm / Nominal magnification: 21000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Digitization - Dimensions - Width: 7420 pixel / Digitization - Dimensions - Height: 7676 pixel / Digitization - Sampling interval: 5.0 µm / Digitization - Frames/image: 3-20 / Number grids imaged: 12 / Number real images: 10367 / Average exposure time: 9.0 sec. / Average electron dose: 30.0 e/Å2
Experimental equipment
Model: Talos Arctica / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 528196
CTF correctionSoftware - Name: RELION (ver. 1.3)
Initial angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: EMAN (ver. 2)
Final 3D classificationNumber classes: 4
Final angle assignmentType: PROJECTION MATCHING / Software - Name: RELION (ver. 1.3)
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Algorithm: BACK PROJECTION / Resolution.type: BY AUTHOR / Resolution: 4.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.3) / Number images used: 139236

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Atomic model buiding 1

RefinementSpace: RECIPROCAL / Protocol: AB INITIO MODEL / Overall B value: 70
Output model

PDB-5t0g:
Structural basis for dynamic regulation of the human 26S proteasome

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