3VR0

Crystal structure of Pyrococcus furiosus PbaB, an archaeal proteasome activator

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

An archaeal homolog of proteasome assembly factor functions as a proteasome activator

Kumoi, K., Satoh, T., Murata, K., Hiromoto, T., Mizushima, T., Kamiya, Y., Noda, M., Uchiyama, S., Yagi, H., Kato, K.

(2013) PLoS One 8: e60294-e60294

  • DOI: 10.1371/journal.pone.0060294
  • Primary Citation of Related Structures:  
    3VR0

  • PubMed Abstract: 

    • Assembly of the eukaryotic 20S proteasome is an ordered process involving several proteins operating as proteasome assembly factors including PAC1-PAC2 but archaeal 20S proteasome subunits can spontaneously assemble into an active cylindrical architecture ...

    Assembly of the eukaryotic 20S proteasome is an ordered process involving several proteins operating as proteasome assembly factors including PAC1-PAC2 but archaeal 20S proteasome subunits can spontaneously assemble into an active cylindrical architecture. Recent bioinformatic analysis identified archaeal PAC1-PAC2 homologs PbaA and PbaB. However, it remains unclear whether such assembly factor-like proteins play an indispensable role in orchestration of proteasome subunits in archaea. We revealed that PbaB forms a homotetramer and exerts a dual function as an ATP-independent proteasome activator and a molecular chaperone through its tentacle-like C-terminal segments. Our findings provide insights into molecular evolution relationships between proteasome activators and assembly factors.

    Organizational Affiliation: 

    Graduate School of Pharmaceutical Sciences, Nagoya City University, 3-1 Tanabe-dori, Mizuho-ku Nagoya, Japan.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Putative uncharacterized proteinA, B, C, D283Pyrococcus furiosus DSM 3638Mutation(s): 0 
Gene Names: PF1142
Find proteins for Q8U1R3 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q8U1R3 
Go to UniProtKB:  Q8U1R3
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AU
Query on AU
Download Ideal Coordinates CCD File 
E [auth A] , F [auth A] , G [auth A] , H [auth A] , I [auth B] , J [auth B] , K [auth B] , L [auth B] , 
E [auth A],  F [auth A],  G [auth A],  H [auth A],  I [auth B],  J [auth B],  K [auth B],  L [auth B],  M [auth B],  N [auth C],  O [auth C],  P [auth C],  Q [auth C],  R [auth D],  S [auth D],  T [auth D],  U [auth D],  V [auth D]
GOLD ION
Au
ZBKIUFWVEIBQRT-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.198 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 115.6α = 90
b = 156.4β = 90
c = 153γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-04-03
    Type: Initial release
  • Version 1.1: 2013-07-31
    Changes: Database references