1IRU

Crystal Structure of the mammalian 20S proteasome at 2.75 A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.252 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structure of the mammalian 20S proteasome at 2.75 A resolution.

Unno, M.Mizushima, T.Morimoto, Y.Tomisugi, Y.Tanaka, K.Yasuoka, N.Tsukihara, T.

(2002) Structure 10: 609-618

  • DOI: 10.1016/s0969-2126(02)00748-7
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The 20S proteasome is the catalytic portion of the 26S proteasome. Constitutively expressed mammalian 20S proteasomes have three active subunits, beta 1, beta 2, and beta 5, which are replaced in the immunoproteasome by interferon-gamma-inducible sub ...

    The 20S proteasome is the catalytic portion of the 26S proteasome. Constitutively expressed mammalian 20S proteasomes have three active subunits, beta 1, beta 2, and beta 5, which are replaced in the immunoproteasome by interferon-gamma-inducible subunits beta 1i, beta 2i, and beta 5i, respectively. Here we determined the crystal structure of the bovine 20S proteasome at 2.75 A resolution. The structures of alpha 2, beta 1, beta 5, beta 6, and beta 7 subunits of the bovine enzyme were different from the yeast enzyme but enabled the bovine proteasome to accommodate either the constitutive or the inducible subunits. A novel N-terminal nucleophile hydrolase activity was proposed for the beta 7 subunit. We also determined the site of the nuclear localization signals in the molecule. A model of the immunoproteasome was predicted from this constitutive structure.


    Organizational Affiliation

    Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
A, O
246Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
B, P
233Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
C, Q
261Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
D, R
248Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
E, S
241Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
F, T
263Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
G, U
254Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
H, V
205Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
I, W
234Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
J, X
205Bos taurusMutation(s): 0 
Gene Names: PSMB3
EC: 3.4.25.1
Find proteins for P33672 (Bos taurus)
Go to UniProtKB:  P33672

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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
K, Y
201Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
L, Z
204Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
1, M
213Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.

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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
2, N
219Bos taurusMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
1, A, B, C, D, G, I, J, K, M, O, P, Q, R, U, W, X, Y
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.250 
  • R-Value Observed: 0.252 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 316.7α = 90
b = 205.9β = 90
c = 116γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
X-PLORmodel building
CNSrefinement
CCP4data scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-05-22
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance