8QYJ

Human 20S proteasome assembly structure 1


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.73 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Visualizing chaperone-mediated multistep assembly of the human 20S proteasome.

Adolf, F.Du, J.Goodall, E.A.Walsh Jr., R.M.Rawson, S.von Gronau, S.Harper, J.W.Hanna, J.Schulman, B.A.

(2024) Nat Struct Mol Biol 31: 1176-1188

  • DOI: https://doi.org/10.1038/s41594-024-01268-9
  • Primary Citation of Related Structures:  
    8QYJ, 8QYL, 8QYM, 8QYN, 8QYO, 8QYS, 8QZ9

  • PubMed Abstract: 

    Dedicated assembly factors orchestrate the stepwise production of many molecular machines, including the 28-subunit proteasome core particle (CP) that mediates protein degradation. Here we report cryo-electron microscopy reconstructions of seven recombinant human subcomplexes that visualize all five chaperones and the three active site propeptides across a wide swath of the assembly pathway. Comparison of these chaperone-bound intermediates and a matching mature CP reveals molecular mechanisms determining the order of successive subunit additions, as well as how proteasome subcomplexes and assembly factors structurally adapt upon progressive subunit incorporation to stabilize intermediates, facilitate the formation of subsequent intermediates and ultimately rearrange to coordinate proteolytic activation with gated access to active sites. This work establishes a methodologic approach for structural analysis of multiprotein complex assembly intermediates, illuminates specific functions of assembly factors and reveals conceptual principles underlying human proteasome biogenesis, thus providing an explanation for many previous biochemical and genetic observations.


  • Organizational Affiliation

    Department of Molecular Machines and Signaling, Max Planck Institute of Biochemistry, Martinsried, Germany. fadolf@biochem.mpg.de.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-2234Homo sapiensMutation(s): 0 
Gene Names: PSMA2HC3PSC3
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PHAROS:  P25787
GTEx:  ENSG00000106588 
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UniProt GroupP25787
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-4261Homo sapiensMutation(s): 0 
Gene Names: PSMA4HC9PSC9
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Find proteins for P25789 (Homo sapiens)
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PHAROS:  P25789
GTEx:  ENSG00000041357 
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UniProt GroupP25789
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-7248Homo sapiensMutation(s): 0 
Gene Names: PSMA7HSPC
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PHAROS:  O14818
GTEx:  ENSG00000101182 
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UniProt GroupO14818
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-5242Homo sapiensMutation(s): 1 
Gene Names: PSMA5
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Find proteins for P28066 (Homo sapiens)
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PHAROS:  P28066
GTEx:  ENSG00000143106 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-1264Homo sapiensMutation(s): 1 
Gene Names: PSMA1
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GTEx:  ENSG00000129084 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-3255Homo sapiensMutation(s): 0 
Gene Names: PSMA3HC8PSC8
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GTEx:  ENSG00000100567 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit alpha type-6246Homo sapiensMutation(s): 0 
Gene Names: PSMA6PROS27
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GTEx:  ENSG00000100902 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome maturation protein141Homo sapiensMutation(s): 0 
Gene Names: POMPC13orf12UMP1HSPC014HSPC036PNAS-110
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GTEx:  ENSG00000132963 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome assembly chaperone 1288Homo sapiensMutation(s): 0 
Gene Names: PSMG1C21LRPDSCR2PAC1
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GTEx:  ENSG00000183527 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome assembly chaperone 2265Homo sapiensMutation(s): 1 
Gene Names: PSMG2
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GTEx:  ENSG00000128789 
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UniProt GroupQ969U7
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome subunit beta type-7316Homo sapiensMutation(s): 0 
Gene Names: PSMB7
EC: 3.4.25.1
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GTEx:  ENSG00000136930 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome assembly chaperone 3122Homo sapiensMutation(s): 0 
Gene Names: PSMG3C7orf48PAC3
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GTEx:  ENSG00000157778 
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome assembly chaperone 4123Homo sapiensMutation(s): 0 
Gene Names: PSMG4C6orf86PAC4
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GTEx:  ENSG00000180822 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.73 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermany--
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--
National Institutes of Health/National Institute on Aging (NIH/NIA)United States--
Aligning Science Across Parkinsons (ASAP)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-21
    Type: Initial release
  • Version 1.1: 2024-03-06
    Changes: Database references
  • Version 1.2: 2024-04-17
    Changes: Database references
  • Version 1.3: 2024-08-28
    Changes: Data collection, Database references