3JCK

Structure of the yeast 26S proteasome lid sub-complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.5 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Atomic structure of the 26S proteasome lid reveals the mechanism of deubiquitinase inhibition.

Dambacher, C.M.Worden, E.J.Herzik, M.A.Martin, A.Lander, G.C.

(2016) Elife 5: e13027-e13027

  • DOI: 10.7554/eLife.13027

  • PubMed Abstract: 
  • The 26S proteasome is responsible for the selective, ATP-dependent degradation of polyubiquitinated cellular proteins. Removal of ubiquitin chains from targeted substrates at the proteasome is a prerequisite for substrate processing and is accomplish ...

    The 26S proteasome is responsible for the selective, ATP-dependent degradation of polyubiquitinated cellular proteins. Removal of ubiquitin chains from targeted substrates at the proteasome is a prerequisite for substrate processing and is accomplished by Rpn11, a deubiquitinase within the 'lid' sub-complex. Prior to the lid's incorporation into the proteasome, Rpn11 deubiquitinase activity is inhibited to prevent unwarranted deubiquitination of polyubiquitinated proteins. Here we present the atomic model of the isolated lid sub-complex, as determined by cryo-electron microscopy at 3.5 Å resolution, revealing how Rpn11 is inhibited through its interaction with a neighboring lid subunit, Rpn5. Through mutagenesis of specific residues, we describe the network of interactions that are required to stabilize this inhibited state. These results provide significant insight into the intricate mechanisms of proteasome assembly, outlining the substantial conformational rearrangements that occur during incorporation of the lid into the 26S holoenzyme, which ultimately activates the deubiquitinase for substrate degradation.


    Organizational Affiliation

    QB3 Institute, University of California, Berkeley, Berkeley, United States.,Howard Hughes Medical Institute, University of California, Berkeley, Berkeley, United States.,Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, United States.,Department of Integrative Structural and Computational Biology, The Scripps Research Institute, La Jolla, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN3
A
438Saccharomyces 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: 2
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN5
B
445Saccharomyces 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: 3
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN6
C
434Saccharomyces 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: 4
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN7
D
429Saccharomyces 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: 5
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN8
E
338Saccharomyces 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: 6
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN9
F
393Saccharomyces 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: 7
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin carboxyl-terminal hydrolase RPN11
G
306Saccharomyces 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: 8
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit RPN12
H
274Saccharomyces 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
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
26S proteasome complex subunit SEM1
I
89Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SEM1 (DSH1)
Find proteins for O94742 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: SEM1
Go to UniProtKB:  O94742
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
G
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
UNK
Query on UNK
A
L-PEPTIDE LINKINGC4 H9 N O2

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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.5 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: 2016-01-20
    Type: Initial release
  • Version 1.1: 2016-06-29
    Type: Database references
  • Version 1.2: 2018-07-18
    Type: Data collection