1YAR

Structure of Archeabacterial 20S proteasome mutant D9S- PA26 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The 1.9 A structure of a proteasome-11S activator complex and implications for proteasome-PAN/PA700 interactions.

Forster, A.Masters, E.I.Whitby, F.G.Robinson, H.Hill, C.P.

(2005) Mol Cell 18: 589-599

  • DOI: 10.1016/j.molcel.2005.04.016
  • Primary Citation of Related Structures:  
    1Z7Q, 1YA7, 1YAU, 1YAR

  • PubMed Abstract: 
  • Proteasomes are cylindrical structures that function in multiple cellular processes by degrading a wide variety of cytosolic and nuclear proteins. Substrate access and product release from the enclosed catalytic chamber occurs through axial pores tha ...

    Proteasomes are cylindrical structures that function in multiple cellular processes by degrading a wide variety of cytosolic and nuclear proteins. Substrate access and product release from the enclosed catalytic chamber occurs through axial pores that are opened by activator complexes. Here, we report high-resolution structures of wild-type and mutant archaeal proteasomes bound to the activator PA26. These structures support the proposal that an ordered open conformation is required for proteolysis and that its formation can be triggered by outward displacement of surrounding residues. The structures and associated biochemical assays reveal the mechanism of binding, which involves an interaction between the PA26 C terminus and a conserved lysine. Surprisingly, biochemical observations implicate an equivalent interaction for the unrelated ATP-dependent activators PAN and PA700.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, Utah 84132, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome alpha subunitABCDEFG233Thermoplasma acidophilumMutation(s): 1 
Gene Names: psmA
EC: 3.4.25.1
Find proteins for P25156 (Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165))
Explore P25156 
Go to UniProtKB:  P25156
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome beta subunitHIJKLMN217Thermoplasma acidophilumMutation(s): 0 
Gene Names: psmB
EC: 3.4.25.1
Find proteins for P28061 (Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165))
Explore P28061 
Go to UniProtKB:  P28061
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
proteasome activator protein PA26OPQRSTU237Trypanosoma bruceiMutation(s): 1 
Find proteins for Q9U8G2 (Trypanosoma brucei)
Explore Q9U8G2 
Go to UniProtKB:  Q9U8G2
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B, C, D, F, G, H, I, J, K, L, M, N
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
H, I, J, K, L, M, N
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 254.874α = 90
b = 127.512β = 92.45
c = 181.182γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance