5L4G

The human 26S proteasome at 3.9 A


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 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

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: 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 ...

    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; f.g.forster@uu.nl baumeist@biochem.mpg.de.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-6O [auth A], A [auth N]246Homo sapiensMutation(s): 0 
Gene Names: PSMA6PROS27
EC: 3.4.25.1
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-2P [auth B], B [auth O]234Homo sapiensMutation(s): 0 
Gene Names: PSMA2HC3PSC3
EC: 3.4.25.1
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-4Q [auth C], C [auth P]261Homo sapiensMutation(s): 0 
Gene Names: PSMA4HC9PSC9
EC: 3.4.25.1
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-7R [auth D], D [auth Q]248Homo sapiensMutation(s): 0 
Gene Names: PSMA7HSPC
EC: 3.4.25.1
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-5S [auth E], E [auth R]241Homo sapiensMutation(s): 0 
Gene Names: PSMA5
EC: 3.4.25.1
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-1T [auth F], F [auth S]263Homo sapiensMutation(s): 0 
Gene Names: PSMA1HC2NUPROS30PSC2
EC: 3.4.25.1
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit alpha type-3U [auth G], G [auth T]255Homo sapiensMutation(s): 0 
Gene Names: PSMA3HC8PSC8
EC: 3.4.25.1
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-1V [auth 1], H [auth U]241Homo sapiensMutation(s): 0 
Gene Names: PSMB1PSC5
EC: 3.4.25.1
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-2W [auth 2], I [auth V]201Homo sapiensMutation(s): 0 
Gene Names: PSMB2
EC: 3.4.25.1
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-3X [auth 3], J [auth W]205Homo sapiensMutation(s): 0 
Gene Names: PSMB3
EC: 3.4.25.1
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-4Y [auth 4], K [auth X]264Homo sapiensMutation(s): 0 
Gene Names: PSMB4PROS26
EC: 3.4.25.1
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-5Z [auth 5], L [auth Y]263Homo sapiensMutation(s): 0 
Gene Names: PSMB5LMPXMB1X
EC: 3.4.25.1
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-6AA [auth 6], M [auth Z]239Homo sapiensMutation(s): 0 
Gene Names: PSMB6LMPYY
EC: 3.4.25.1
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome subunit beta type-7BA [auth 7], N [auth 8]277Homo sapiensMutation(s): 0 
Gene Names: PSMB7Z
EC: 3.4.25.1
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 7CA [auth H]433Homo sapiensMutation(s): 0 
Gene Names: PSMC2MSS1
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Entity ID: 16
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 4DA [auth I]440Homo sapiensMutation(s): 0 
Gene Names: PSMC1
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Entity ID: 17
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 6BEA [auth K]418Homo sapiensMutation(s): 0 
Gene Names: PSMC4MIP224TBP7
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Entity ID: 18
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 10BFA [auth L]389Homo sapiensMutation(s): 0 
Gene Names: PSMC6SUG2
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Entity ID: 19
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 6AGA [auth M]439Homo sapiensMutation(s): 0 
Gene Names: PSMC3TBP1
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Entity ID: 20
MoleculeChainsSequence LengthOrganismDetailsImage
26S protease regulatory subunit 8HA [auth J]406Homo sapiensMutation(s): 0 
Gene Names: PSMC5SUG1
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Experimental Data & Validation

Experimental Data

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

Structure Validation

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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, Derived calculations
  • Version 1.3: 2019-12-11
    Changes: Other