7YQD

EM structure of human PA28gamma (wild-type)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


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Literature

Atomic resolution Cryo-EM structure of human proteasome activator PA28 gamma.

Chen, D.D.Hao, J.Shen, C.H.Deng, X.M.Yun, C.H.

(2022) Int J Biol Macromol 219: 500-507

  • DOI: 10.1016/j.ijbiomac.2022.07.246
  • Primary Citation of Related Structures:  
    7YQC, 7YQD

  • PubMed Abstract: 
  • The PA28 family proteasome activators play important roles in regulating proteasome activities. Though the three paralogs (PA28α, PA28β, and PA28γ) are similar in terms of primary sequence, they show significant differences in expression pattern, cellular localization and most importantly, biological functions ...

    The PA28 family proteasome activators play important roles in regulating proteasome activities. Though the three paralogs (PA28α, PA28β, and PA28γ) are similar in terms of primary sequence, they show significant differences in expression pattern, cellular localization and most importantly, biological functions. While PA28αβ is responsible for promoting peptidase activity of proteasome to facilitate MHC-I antigen processing, but unable to promote protein degradation, PA28γ is well-known to not only promote peptidase activity but also proteolytic activity of proteasome. However, why this paralog has the unique function remains elusive. Previous structural studies have mainly focused on mammalian PA28α, PA28β and PA28αβ heptamers, while structural studies on mammalian PA28γ of atomic resolution are still absent to date. In the present work, we determined the Cryo-EM structure of the human PA28γ heptamer at atomic resolution, revealing interesting unique structural features that may hint our understanding the functional mechanisms of this proteasome activator.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, School of Basic Medical Sciences, Peking University, Beijing 100191, China. Electronic address: yunch@pku.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome activator complex subunit 3
A, B, C, D, E, F, G
A, B, C, D, E, F, G
254Homo sapiensMutation(s): 0 
Gene Names: PSME3
UniProt & NIH Common Fund Data Resources
Find proteins for P61289 (Homo sapiens)
Explore P61289 
Go to UniProtKB:  P61289
PHAROS:  P61289
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61289
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China32071207

Revision History  (Full details and data files)

  • Version 1.0: 2022-09-21
    Type: Initial release