5VHN

Conformational Landscape of the p28-Bound Human Proteasome Regulatory Particle


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Conformational Landscape of the p28-Bound Human Proteasome Regulatory Particle.

Lu, Y.Wu, J.Dong, Y.Chen, S.Sun, S.Ma, Y.B.Ouyang, Q.Finley, D.Kirschner, M.W.Mao, Y.

(2017) Mol. Cell 67: 322-333.e6

  • DOI: 10.1016/j.molcel.2017.06.007
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The proteasome holoenzyme is activated by its regulatory particle (RP) consisting of two subcomplexes, the lid and the base. A key event in base assembly is the formation of a heterohexameric ring of AAA-ATPases, which is guided by at least four RP a ...

    The proteasome holoenzyme is activated by its regulatory particle (RP) consisting of two subcomplexes, the lid and the base. A key event in base assembly is the formation of a heterohexameric ring of AAA-ATPases, which is guided by at least four RP assembly chaperones in mammals: PAAF1, p28/gankyrin, p27/PSMD9, and S5b. Using cryogenic electron microscopy, we analyzed the non-AAA structure of the p28-bound human RP at 4.5 Å resolution and determined seven distinct conformations of the Rpn1-p28-AAA subcomplex within the p28-bound RP at subnanometer resolutions. Remarkably, the p28-bound AAA ring does not form a channel in the free RP and spontaneously samples multiple "open" and "closed" topologies at the Rpt2-Rpt6 and Rpt3-Rpt4 interfaces. Our analysis suggests that p28 assists the proteolytic core particle to select a specific conformation of the ATPase ring for RP engagement and is released in a shoehorn-like fashion in the last step of the chaperone-mediated proteasome assembly.


    Organizational Affiliation

    Department of Systems Biology, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
26S proteasome non-ATPase regulatory subunit 10
G
223Homo sapiensMutation(s): 0 
Gene Names: PSMD10
Find proteins for O75832 (Homo sapiens)
Go to Gene View: PSMD10
Go to UniProtKB:  O75832
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 7
A
266Homo sapiensMutation(s): 0 
Gene Names: PSMC2 (MSS1)
Find proteins for P35998 (Homo sapiens)
Go to Gene View: PSMC2
Go to UniProtKB:  P35998
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 4
B
266Homo sapiensMutation(s): 0 
Gene Names: PSMC1
Find proteins for P62191 (Homo sapiens)
Go to Gene View: PSMC1
Go to UniProtKB:  P62191
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 6B
D
262Homo sapiensMutation(s): 0 
Gene Names: PSMC4 (MIP224, TBP7)
Find proteins for P43686 (Homo sapiens)
Go to Gene View: PSMC4
Go to UniProtKB:  P43686
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 10B
E
275Homo sapiensMutation(s): 0 
Gene Names: PSMC6 (SUG2)
Find proteins for P62333 (Homo sapiens)
Go to Gene View: PSMC6
Go to UniProtKB:  P62333
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 6A
F
267Homo sapiensMutation(s): 0 
Gene Names: PSMC3 (TBP1)
Find proteins for P17980 (Homo sapiens)
Go to Gene View: PSMC3
Go to UniProtKB:  P17980
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
26S proteasome regulatory subunit 8
C
266Homo sapiensMutation(s): 0 
Gene Names: PSMC5 (SUG1)
Find proteins for P62195 (Homo sapiens)
Go to Gene View: PSMC5
Go to UniProtKB:  P62195
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
26S proteasome non-ATPase regulatory subunit 2
f
848Homo sapiensMutation(s): 0 
Gene Names: PSMD2 (TRAP2)
Find proteins for Q13200 (Homo sapiens)
Go to Gene View: PSMD2
Go to UniProtKB:  Q13200
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-08-23
    Type: Initial release
  • Version 1.1: 2018-08-22
    Type: Data collection, Database references