3J47

Formation of an intricate helical bundle dictates the assembly of the 26S proteasome lid


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.4 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

Formation of an Intricate Helical Bundle Dictates the Assembly of the 26S Proteasome Lid.

Estrin, E.Lopez-Blanco, J.R.Chacon, P.Martin, A.

(2013) Structure 21: 1624-1635

  • DOI: 10.1016/j.str.2013.06.023

  • PubMed Abstract: 
  • The 26S proteasome is the major ATP-dependent protease in eukaryotes and thus involved in regulating a diverse array of vital cellular processes. Three subcomplexes form this massive degradation machine: the lid, the base, and the core. While assembl ...

    The 26S proteasome is the major ATP-dependent protease in eukaryotes and thus involved in regulating a diverse array of vital cellular processes. Three subcomplexes form this massive degradation machine: the lid, the base, and the core. While assembly of base and core has been well-studied, the detailed molecular mechanisms involved in formation of the nine-subunit lid remain largely unknown. Here, we reveal that helices found at the C terminus of each lid subunit form a helical bundle that directs the ordered self-assembly of the lid subcomplex. Furthermore, we use an integrative modeling approach to gain critical insights into the bundle topology and provide an important structural framework for our biochemical data. We show that the helical bundle serves as a hub through which the last-added subunit Rpn12 monitors proper lid assembly before incorporation into the proteasome. Finally, we predict that the assembly of the COP9 signalosome depends on a similar helical bundle.


    Related Citations: 
    • Near-atomic resolution structural model of the yeast 26S proteasome.
      Beck, F.,Unverdorben, P.,Bohn, S.,Schweitzer, A.,Pfeifer, G.,Sakata, E.,Nickell, S.,Plitzko, J.M.,Villa, E.,Baumeister, W.,Forster, F.
      (2012) Proc.Natl.Acad.Sci.USA 109: 14870


    Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN11
V
69Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN11 (MPR1)
EC: 3.4.19.12
Find proteins for P43588 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P43588
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN8
U
121Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN8
Find proteins for Q08723 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q08723
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN9
O
28Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN9 (NAS7)
Find proteins for Q04062 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q04062
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN5
P
34Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN5 (NAS5)
Find proteins for Q12250 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12250
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN6
Q
25Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN6 (NAS4)
Find proteins for Q12377 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12377
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN7
R
26Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN7
Find proteins for Q06103 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q06103
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN3
S
24Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN3 (SUN2)
Find proteins for P40016 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40016
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN12
T
17Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: RPN12 (NIN1)
Find proteins for P32496 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P32496
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-08-28
    Type: Initial release
  • Version 1.1: 2013-09-25
    Type: Database references
  • Version 1.2: 2013-10-02
    Type: Other
  • Version 1.3: 2018-07-18
    Type: Data collection