4V7O

Proteasome Activator Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of a Blm10 complex reveals common mechanisms for proteasome binding and gate opening.

Sadre-Bazzaz, K.Whitby, F.G.Robinson, H.Formosa, T.Hill, C.P.

(2010) Mol Cell 37: 728-735

  • DOI: https://doi.org/10.1016/j.molcel.2010.02.002
  • Primary Citation of Related Structures:  
    4V7O

  • PubMed Abstract: 

    The proteasome is an abundant protease that is critically important for numerous cellular pathways. Proteasomes are activated in vitro by three known classes of proteins/complexes, including Blm10/PA200. Here, we report a 3.4 A resolution crystal structure of a proteasome-Blm10 complex, which reveals that Blm10 surrounds the proteasome entry pore in the 1.2 MDa complex to form a largely closed dome that is expected to restrict access of potential substrates. This architecture and the observation that Blm10 induces a disordered proteasome gate structure challenge the assumption that Blm10 functions as an activator of proteolysis in vivo. The Blm10 C terminus binds in the same manner as seen for 11S activators and inferred for 19S/PAN activators and indicates a unified model for gate opening. We also demonstrate that Blm10 acts to maintain mitochondrial function. Consistent with the structural data, the C-terminal residues of Blm10 are needed for this activity.


  • Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84112-5650, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component C7-alphaA [auth AA],
IA [auth BA],
O [auth AC],
WA [auth BO]
243Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component Y7B [auth AG],
JA [auth BB],
P [auth AS],
XA [auth BP]
231Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component Y13C [auth AH],
KA [auth BC],
Q [auth AT],
YA [auth BQ]
232Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PRE6D [auth AI],
LA [auth BD],
R [auth AU],
ZA [auth BR]
227Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PUP2AB [auth BS],
E [auth AJ],
MA [auth BE],
S [auth AV]
250Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PRE5BB [auth BT],
F [auth AK],
NA [auth BF],
T [auth AW]
234Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component C1CB [auth BU],
G [auth AL],
OA [auth BG],
U [auth AX]
244Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
UniProt
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PRE3DB [auth BV],
H [auth AB],
PA [auth BH],
V [auth AD]
196Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PUP1EB [auth BW],
I [auth AM],
QA [auth BI],
W [auth AY]
222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PUP3FB [auth BX],
J [auth AN],
RA [auth BJ],
X [auth AZ]
204Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component C11GB [auth BY],
K [auth AO],
SA [auth BK],
Y [auth A1]
198Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PRE2HB [auth BZ],
L [auth AP],
TA [auth BL],
Z [auth A2]
212Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component C5AA [auth A3],
IB [auth B1],
M [auth AQ],
UA [auth BM]
222Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 14
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome component PRE4BA [auth A4],
JB [auth B2],
N [auth AR],
VA [auth BN]
233Saccharomyces cerevisiaeMutation(s): 0 
EC: 3.4.25.1
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Entity ID: 15
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome activator BLM10CA [auth AE],
FA [auth AF],
KB [auth B3],
NB [auth B6]
76Saccharomyces cerevisiaeMutation(s): 0 
UniProt
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Entity ID: 16
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome activator BLM10DA [auth A5],
GA [auth A7],
LB [auth B4],
OB [auth B7]
799Saccharomyces cerevisiaeMutation(s): 0 
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Entity ID: 17
MoleculeChains Sequence LengthOrganismDetailsImage
Proteasome activator BLM10EA [auth A6],
HA [auth A8],
MB [auth B5],
PB [auth B8]
997Saccharomyces cerevisiaeMutation(s): 0 
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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 236.116α = 90
b = 127.739β = 102.85
c = 532.668γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
ADSCdata collection
PHENIXrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-07-09
    Type: Initial release
  • Version 1.1: 2014-12-10
    Changes: Other
  • Version 1.2: 2017-11-22
    Changes: Refinement description
  • Version 1.3: 2024-02-28
    Changes: Data collection, Database references
  • Version 1.4: 2024-04-03
    Changes: Refinement description