1Z7Q

Crystal structure of the 20s proteasome from yeast in complex with the proteasome activator PA26 from Trypanosome brucei at 3.2 angstroms resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.263 

wwPDB Validation   3D Report Full Report


This is version 1.3 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:  
    1YA7, 1YAR, 1YAU, 1Z7Q

  • 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 that are opened by activator complexes ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C7-alphaA, O252Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component Y7B, P250Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component Y13C, Q258Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE6D, R254Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP2E, S260Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE5F, T234Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C1G, U288Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE3H, V196Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP1I, W222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PUP3J, X205Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component C11K, Y198Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE2L, Z212Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
Potential proteasome component C5M, AA [auth a]222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome component PRE4N, BA [auth b]233Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetailsImage
proteasome activator protein PA26231Trypanosoma bruceiMutation(s): 0 
UniProt
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.22 Å
  • R-Value Free: 0.308 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.263 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 192.964α = 90
b = 232.127β = 90
c = 296.772γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-08-09
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-12-03
    Changes: Other