5L4K

The human 26S proteasome lid


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.4 of the entry. See complete history


Literature

Structure of the human 26S proteasome at a resolution of 3.9 angstrom.

Schweitzer, A.Aufderheide, A.Rudack, T.Beck, F.Pfeifer, G.Plitzko, J.M.Sakata, E.Schulten, K.Forster, F.Baumeister, W.

(2016) Proc Natl Acad Sci U S A 113: 7816-7821

  • DOI: https://doi.org/10.1073/pnas.1608050113
  • Primary Citation of Related Structures:  
    5L4G, 5L4K

  • PubMed Abstract: 

    Protein degradation in eukaryotic cells is performed by the Ubiquitin-Proteasome System (UPS). The 26S proteasome holocomplex consists of a core particle (CP) that proteolytically degrades polyubiquitylated proteins, and a regulatory particle (RP) containing the AAA-ATPase module. This module controls access to the proteolytic chamber inside the CP and is surrounded by non-ATPase subunits (Rpns) that recognize substrates and deubiquitylate them before unfolding and degradation. The architecture of the 26S holocomplex is highly conserved between yeast and humans. The structure of the human 26S holocomplex described here reveals previously unidentified features of the AAA-ATPase heterohexamer. One subunit, Rpt6, has ADP bound, whereas the other five have ATP in their binding pockets. Rpt6 is structurally distinct from the other five Rpt subunits, most notably in its pore loop region. For Rpns, the map reveals two main, previously undetected, features: the C terminus of Rpn3 protrudes into the mouth of the ATPase ring; and Rpn1 and Rpn2, the largest proteasome subunits, are linked by an extended connection. The structural features of the 26S proteasome observed in this study are likely to be important for coordinating the proteasomal subunits during substrate processing.


  • Organizational Affiliation

    Department of Molecular Structural Biology, Max-Planck Institute of Biochemistry, D-82152 Martinsried, Germany;


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 4A [auth W]377Homo sapiensMutation(s): 0 
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PHAROS:  P55036
GTEx:  ENSG00000159352 
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 14B [auth V]310Homo sapiensMutation(s): 0 
EC: 3.4.19
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GTEx:  ENSG00000115233 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 8C [auth T]350Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000099341 
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UniProt GroupP48556
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome complex subunit DSS1D [auth Y]70Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000127922 
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 2E [auth Z]908Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000175166 
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 1F [auth N]953Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000173692 
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 3G [auth S]534Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000108344 
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 12H [auth P]456Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000197170 
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 11I [auth Q]422Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000108671 
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 6J [auth R]389Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000163636 
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 7K [auth U]324Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000103035 
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 13L [auth O]376Homo sapiensMutation(s): 0 
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GTEx:  ENSG00000185627 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION1.4
MODEL REFINEMENTPHENIX

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-09-07
    Type: Initial release
  • Version 1.1: 2016-09-21
    Changes: Database references
  • Version 1.2: 2017-08-02
    Changes: Data collection
  • Version 1.3: 2019-12-11
    Changes: Other
  • Version 1.4: 2024-05-08
    Changes: Data collection, Database references, Refinement description