5VHP

Conformational Landscape of the p28-Bound Human Proteasome Regulatory Particle


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.90 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:  
    5VGZ, 5VHF, 5VHH, 5VHI, 5VHJ, 5VHM, 5VHN, 5VHO, 5VHP, 5VHQ, 5VHR, 5VHS

  • 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 assembly chaperones in mammals: PAAF1, p28/gankyrin, p27/PSMD9, and S5b ...

    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

    State Key Laboratory for Artificial Microstructures and Mesoscopic Physics, Institute of Condensed Matter Physics, School of Physics, Center for Quantitative Biology, Peking University, Beijing 100871, China; Intel Parallel Computing Center for Structural Biology, Dana-Farber Cancer Institute, Boston, MA 02215, USA; Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA. Electronic address: youdong_mao@dfci.harvard.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 10A [auth G]224Homo sapiensMutation(s): 0 
Gene Names: PSMD10
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PHAROS:  O75832
GTEx:  ENSG00000101843 
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UniProt GroupO75832
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 7B [auth A]266Homo sapiensMutation(s): 0 
Gene Names: PSMC2MSS1
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GTEx:  ENSG00000161057 
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 4C [auth B]266Homo sapiensMutation(s): 0 
Gene Names: PSMC1
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GTEx:  ENSG00000100764 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 6BD262Homo sapiensMutation(s): 0 
Gene Names: PSMC4MIP224TBP7
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GTEx:  ENSG00000013275 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 10BE262Homo sapiensMutation(s): 0 
Gene Names: PSMC6SUG2
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 6AF267Homo sapiensMutation(s): 0 
Gene Names: PSMC3TBP1
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GTEx:  ENSG00000165916 
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome regulatory subunit 8G [auth C]266Homo sapiensMutation(s): 0 
Gene Names: PSMC5SUG1
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GTEx:  ENSG00000087191 
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
26S proteasome non-ATPase regulatory subunit 2H [auth f]784Homo sapiensMutation(s): 0 
Gene Names: PSMD2TRAP2
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GTEx:  ENSG00000175166 
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 7.90 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: 2017-08-23
    Type: Initial release
  • Version 1.1: 2018-08-22
    Changes: Data collection, Database references