Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report

Global Symmetry: Cyclic - C7  (3D View)
Global Stoichiometry: Homo 7-mer - A7 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 193.86 kDa 
• Atom Count: 14081 
• Modelled Residue Count: 1701 
• Deposited Residue Count: 1722 
• Unique protein chains: 1

1J2P

alpha-ring from the proteasome from archaeoglobus fulgidus

• PDB DOI: 10.2210/pdb1J2P/pdb

• Classification: HYDROLASE
• Organism(s): Archaeoglobus fulgidus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-01-08 Released: 2003-03-18 
• Deposition Author(s): Groll, M., Brandstetter, H., Bartunik, H., Bourenkow, G., Huber, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.289 
• R-Value Work: 0.257 
• R-Value Observed: 0.257 

Literature

Investigations on the Maturation and Regulation of Archaebacterial Proteasomes

Groll, M., Brandstetter, H., Bartunik, H., Bourenkow, G., Huber, R.

(2003) J Mol Biol 327: 75-83

• PubMed: 12614609 
• DOI: 10.1016/s0022-2836(03)00080-9
• Primary Citation of Related Structures:  
  1J2P, 1J2Q


• PubMed Abstract: 
  

The 20S proteasome (core particle, CP) is a multifunctional protease complex and composed of four heptameric subunit rings arranged in a hollow, barrel-shaped structure. Here, we report the crystal structure of the CP from Archaeoglobus fulgidus at 2.25A resolution. The analysis of the structure of early and late assembly intermediates of this CP gives new insights in the maturation of archaebacterial CPs and indicates similarities to assembly intermediates observed in eukaryotes. We also show a striking difference in mechanism and regulation of substrate access between eukaryotic and archaebacterial 20S proteasomes. While eukaryotic CPs are auto-inhibited by the N-terminal tails of the outer alpha-ring by imposing topological closure with a characteristic sequence motif (YDR-motif) and show regulatory gating this segment is disordered in the CP and differently structured in the alpha(7)-sub-complex of A.fulgidus leaving a pore leading into the particle with a diameter of 13A. Mutagenesis and functional studies indicate the absence of regulatory gating in the archaeal 20S proteasome.

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Organizational Affiliation: 

Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, D-82152 Planegg-Martinsried, Germany. [e-mail]

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Proteasome alpha subunit	A, B, C, D, E, F, G	246	Archaeoglobus fulgidus	Mutation(s): 0  EC: 3.4.25.1
UniProt
Find proteins for O29760 (Archaeoglobus fulgidus (strain ATCC 49558 / DSM 4304 / JCM 9628 / NBRC 100126 / VC-16)) Explore O29760  Go to UniProtKB:  O29760

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.289 
• R-Value Work: 0.257 
• R-Value Observed: 0.257 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 193.755	α = 90
b = 214.226	β = 90
c = 43.963	γ = 90

Software Package:

Software Name	Purpose
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2003-01-08 
• Released Date: 2003-03-18 
Deposition Author(s): Groll, M., Brandstetter, H., Bartunik, H., Bourenkow, G., Huber, R.

Revision History  

• Version 1.0: 2003-03-18
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance