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
  • Structures With Same Primary Citation

  • 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

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proteasome component C7-alpha
A, O
252Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P21243 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P21243

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Proteasome component Y7
B, P
250Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P23639 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P23639

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Proteasome component Y13
C, Q
258Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P23638 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PRE6
D, R
254Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P40303 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PUP2
E, S
260Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P32379 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PRE5
F, T
234Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P40302 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Proteasome component C1
G, U
288Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P21242 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PRE3
H, V
196Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P38624 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PUP1
I, W
222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P25043 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PUP3
J, X
205Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P25451 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
Proteasome component C11
K, Y
198Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P22141 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PRE2
L, Z
212Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P30656 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
Potential proteasome component C5
M, a
222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P23724 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
Proteasome component PRE4
N, b
233Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
Find proteins for P30657 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 15
MoleculeChainsSequence LengthOrganismDetails
proteasome activator protein PA26
c, d, e, f, g, h, i, j, k, l, m, n, o, p
231Trypanosoma bruceiMutation(s): 0 
Find proteins for Q9U8G2 (Trypanosoma brucei)
Go to UniProtKB:  Q9U8G2
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 

  • 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