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- PDB-6msd: Cryo-EM structures and dynamics of substrate-engaged human 26S pr... -
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Basic information
Entry | Database: PDB / ID: 6msd | ||||||||||||
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Title | Cryo-EM structures and dynamics of substrate-engaged human 26S proteasome | ||||||||||||
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![]() | HYDROLASE / Proteosome | ||||||||||||
Function / homology | ![]() 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 / integrator complex / purine ribonucleoside triphosphate binding / meiosis I ...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 / integrator complex / purine ribonucleoside triphosphate binding / meiosis I / proteasome regulatory particle / cytosolic proteasome complex / positive regulation of proteasomal protein catabolic process / proteasome regulatory particle, lid subcomplex / proteasome-activating activity / proteasome regulatory particle, base subcomplex / metal-dependent deubiquitinase activity / hypothalamus gonadotrophin-releasing hormone neuron development / negative regulation of programmed cell death / protein K63-linked deubiquitination / regulation of endopeptidase activity / 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 / female meiosis I / Resolution of D-loop Structures through Synthesis-Dependent Strand Annealing (SDSA) / positive regulation of protein monoubiquitination / Regulation of ornithine decarboxylase (ODC) / proteasome core complex / Resolution of D-loop Structures through Holliday Junction Intermediates / mitochondrion transport along microtubule / Cross-presentation of soluble exogenous antigens (endosomes) / fat pad development / K63-linked deubiquitinase activity / Somitogenesis / Impaired BRCA2 binding to RAD51 / proteasome binding / female gonad development / myofibril / seminiferous tubule development / transcription factor binding / immune system process / regulation of protein catabolic process / male meiosis I / proteasome storage granule / Presynaptic phase of homologous DNA pairing and strand exchange / positive regulation of intrinsic apoptotic signaling pathway by p53 class mediator / blastocyst development / general transcription initiation factor binding / polyubiquitin modification-dependent protein binding / endopeptidase activator activity / NF-kappaB binding / positive regulation of RNA polymerase II transcription preinitiation complex assembly / proteasome assembly / protein deubiquitination / proteasome endopeptidase complex / proteasome core complex, beta-subunit complex / threonine-type endopeptidase activity / proteasome core complex, alpha-subunit complex / mRNA export from nucleus / regulation of neuron apoptotic process / regulation of proteasomal protein catabolic process / SARS-CoV-1 targets host intracellular signalling and regulatory pathways / enzyme regulator activity / energy homeostasis / ERAD pathway / Maturation of protein E / Maturation of protein E / inclusion body / ER Quality Control Compartment (ERQC) / Myoclonic epilepsy of Lafora / FLT3 signaling by CBL mutants / Prevention of phagosomal-lysosomal fusion / IRAK2 mediated activation of TAK1 complex / Alpha-protein kinase 1 signaling pathway / Glycogen synthesis / IRAK1 recruits IKK complex / IRAK1 recruits IKK complex upon TLR7/8 or 9 stimulation / Membrane binding and targetting of GAG proteins / Endosomal Sorting Complex Required For Transport (ESCRT) / Regulation of TBK1, IKKε (IKBKE)-mediated activation of IRF3, IRF7 / Regulation of TBK1, IKKε-mediated activation of IRF3, IRF7 upon TLR3 ligation / Negative regulation of FLT3 / PTK6 Regulates RTKs and Their Effectors AKT1 and DOK1 / Constitutive Signaling by NOTCH1 HD Domain Mutants / IRAK2 mediated activation of TAK1 complex upon TLR7/8 or 9 stimulation / TICAM1,TRAF6-dependent induction of TAK1 complex / NOTCH2 Activation and Transmission of Signal to the Nucleus / TICAM1-dependent activation of IRF3/IRF7 / APC/C:Cdc20 mediated degradation of Cyclin B / Regulation of FZD by ubiquitination / Downregulation of ERBB4 signaling / p75NTR recruits signalling complexes / APC-Cdc20 mediated degradation of Nek2A / TRAF6 mediated IRF7 activation in TLR7/8 or 9 signaling / Regulation of innate immune responses to cytosolic DNA / TRAF6-mediated induction of TAK1 complex within TLR4 complex / InlA-mediated entry of Listeria monocytogenes into host cells / Regulation of pyruvate metabolism Similarity search - Function | ||||||||||||
Biological species | ![]() | ||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | ||||||||||||
![]() | Mao, Y.D. | ||||||||||||
Funding support | ![]() ![]()
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![]() | ![]() Title: Cryo-EM structures and dynamics of substrate-engaged human 26S proteasome. Authors: Yuanchen Dong / Shuwen Zhang / Zhaolong Wu / Xuemei Li / Wei Li Wang / Yanan Zhu / Svetla Stoilova-McPhie / Ying Lu / Daniel Finley / Youdong Mao / ![]() ![]() Abstract: The proteasome is an ATP-dependent, 2.5-megadalton molecular machine that is responsible for selective protein degradation in eukaryotic cells. Here we present cryo-electron microscopy structures of ...The proteasome is an ATP-dependent, 2.5-megadalton molecular machine that is responsible for selective protein degradation in eukaryotic cells. Here we present cryo-electron microscopy structures of the substrate-engaged human proteasome in seven conformational states at 2.8-3.6 Å resolution, captured during breakdown of a polyubiquitylated protein. These structures illuminate a spatiotemporal continuum of dynamic substrate-proteasome interactions from ubiquitin recognition to substrate translocation, during which ATP hydrolysis sequentially navigates through all six ATPases. There are three principal modes of coordinated hydrolysis, featuring hydrolytic events in two oppositely positioned ATPases, in two adjacent ATPases and in one ATPase at a time. These hydrolytic modes regulate deubiquitylation, initiation of translocation and processive unfolding of substrates, respectively. Hydrolysis of ATP powers a hinge-like motion in each ATPase that regulates its substrate interaction. Synchronization of ATP binding, ADP release and ATP hydrolysis in three adjacent ATPases drives rigid-body rotations of substrate-bound ATPases that are propagated unidirectionally in the ATPase ring and unfold the substrate. | ||||||||||||
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Structure visualization
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Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 2.3 MB | Display | ![]() |
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PDB format | ![]() | Display | ![]() | |
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-Validation report
Summary document | ![]() | 1.5 MB | Display | ![]() |
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Full document | ![]() | 1.6 MB | Display | |
Data in XML | ![]() | 288.6 KB | Display | |
Data in CIF | ![]() | 470.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 9217MC ![]() 9215C ![]() 9216C ![]() 9218C ![]() 9219C ![]() 9220C ![]() 9221C ![]() 9222C ![]() 9223C ![]() 9224C ![]() 9225C ![]() 9226C ![]() 9227C ![]() 9228C ![]() 9229C ![]() 6msbC ![]() 6mseC ![]() 6msgC ![]() 6mshC ![]() 6msjC ![]() 6mskC M: map data used to model this data C: citing same article ( |
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Similar structure data | |
EM raw data | ![]() Data size: 13.9 TB Data #1: Drift-corrected frame-averaged super-counting mode micrographs and extracted particles of substrate-engaged human 26S proteasome [micrographs - single frame]) |
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Assembly
Deposited unit | ![]()
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Components
-26S proteasome non-ATPase regulatory subunit ... , 11 types, 11 molecules UVWXYZabcdf
#1: Protein | Mass: 105958.234 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#2: Protein | Mass: 61066.500 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#3: Protein | Mass: 52979.359 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#4: Protein | Mass: 47526.688 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#5: Protein | Mass: 45592.285 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#6: Protein | Mass: 37086.441 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#7: Protein | Mass: 42995.359 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#8: Protein | Mass: 40781.590 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#9: Protein | Mass: 34488.824 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: O00487, Hydrolases; Acting on peptide bonds (peptidases); Omega peptidases |
#10: Protein | Mass: 39536.676 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#12: Protein | Mass: 100313.625 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-Protein , 2 types, 3 molecules euw
#11: Protein | Mass: 8284.611 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#19: Protein | Mass: 8604.845 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-26S proteasome regulatory subunit ... , 6 types, 6 molecules ABCDEF
#13: Protein | Mass: 48700.805 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
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#14: Protein | Mass: 49260.504 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#15: Protein | Mass: 44852.121 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#16: Protein | Mass: 47426.141 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#17: Protein | Mass: 45867.027 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
#18: Protein | Mass: 49266.457 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() |
-Proteasome subunit alpha type- ... , 7 types, 14 molecules GgHhIiJjKkLlMm
#20: Protein | Mass: 27301.262 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P60900, proteasome endopeptidase complex #21: Protein | Mass: 25796.338 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P25787, proteasome endopeptidase complex #22: Protein | Mass: 29394.648 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P25789, proteasome endopeptidase complex #23: Protein | Mass: 27798.695 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: O14818, proteasome endopeptidase complex #24: Protein | Mass: 26304.779 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P28066, proteasome endopeptidase complex #25: Protein | Mass: 30150.277 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P25786, proteasome endopeptidase complex #26: Protein | Mass: 28338.057 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P25788, proteasome endopeptidase complex |
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-Proteasome subunit beta type- ... , 7 types, 14 molecules NnOoPpQqRrSsTt
#27: Protein | Mass: 25246.455 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P28072, proteasome endopeptidase complex #28: Protein | Mass: 29869.223 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: Q99436, proteasome endopeptidase complex #29: Protein | Mass: 22841.701 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P49720, proteasome endopeptidase complex #30: Protein | Mass: 22864.277 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P49721, proteasome endopeptidase complex #31: Protein | Mass: 28379.053 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P28074, proteasome endopeptidase complex #32: Protein | Mass: 26391.201 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P20618, proteasome endopeptidase complex #33: Protein | Mass: 29099.986 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() References: UniProt: P28070, proteasome endopeptidase complex |
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-Non-polymers , 4 types, 12 molecules 






#34: Chemical | ChemComp-ZN / | ||||
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#35: Chemical | ChemComp-ATP / #36: Chemical | ChemComp-MG / #37: Chemical | |
-Details
Has protein modification | Y |
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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: Human 26S proteasome / Type: COMPLEX / Entity ID: #1-#33 / Source: RECOMBINANT |
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Source (natural) | Organism: ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: unspecified |
Vitrification | Cryogen name: ETHANE |
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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 |
Image recording | Electron dose: 44 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k) |
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Processing
Software | Name: PHENIX / Version: 1.13_2998: / Classification: refinement |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
Symmetry | Point symmetry: C1 (asymmetric) |
3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 79691 / Symmetry type: POINT |