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 

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


  • 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
A, O
246Bos taurusGene Names: PSMA6
EC: 3.4.25.1
Find proteins for Q2YDE4 (Bos taurus)
Go to Gene View: PSMA6
Go to UniProtKB:  Q2YDE4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
B, P
233Bos taurusGene Names: PSMA2
EC: 3.4.25.1
Find proteins for Q3T0Y5 (Bos taurus)
Go to Gene View: PSMA2
Go to UniProtKB:  Q3T0Y5
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
C, Q
261Bos taurusGene Names: PSMA4
EC: 3.4.25.1
Find proteins for Q3ZCK9 (Bos taurus)
Go to Gene View: PSMA4
Go to UniProtKB:  Q3ZCK9
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
D, R
248Bos taurusGene Names: PSMA7
EC: 3.4.25.1
Find proteins for Q3ZBG0 (Bos taurus)
Go to Gene View: PSMA7
Go to UniProtKB:  Q3ZBG0
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
E, S
241Bos taurusGene Names: PSMA5
EC: 3.4.25.1
Find proteins for Q5E987 (Bos taurus)
Go to Gene View: PSMA5
Go to UniProtKB:  Q5E987
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
F, T
263Bos taurusGene Names: PSMA1
EC: 3.4.25.1
Find proteins for Q3T0X5 (Bos taurus)
Go to Gene View: PSMA1
Go to UniProtKB:  Q3T0X5
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
G, U
254Bos taurusGene Names: PSMA3
EC: 3.4.25.1
Find proteins for Q58DU5 (Bos taurus)
Go to Gene View: PSMA3
Go to UniProtKB:  Q58DU5
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
H, V
205Bos taurusGene Names: PSMB6
EC: 3.4.25.1
Find proteins for Q3MHN0 (Bos taurus)
Go to Gene View: PSMB6
Go to UniProtKB:  Q3MHN0
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
I, W
234Bos taurusGene Names: PSMB7
EC: 3.4.25.1
Find proteins for Q2TBP0 (Bos taurus)
Go to Gene View: PSMB7
Go to UniProtKB:  Q2TBP0
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
J, X
205Bos taurusGene Names: PSMB3
EC: 3.4.25.1
Find proteins for P33672 (Bos taurus)
Go to Gene View: PSMB3
Go to UniProtKB:  P33672
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
K, Y
201Bos taurusGene Names: PSMB2
EC: 3.4.25.1
Find proteins for Q5E9K0 (Bos taurus)
Go to Gene View: PSMB2
Go to UniProtKB:  Q5E9K0
Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
L, Z
204Bos taurusGene Names: PSMB5
EC: 3.4.25.1
Find proteins for Q32KL2 (Bos taurus)
Go to Gene View: PSMB5
Go to UniProtKB:  Q32KL2
Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
M, 1
213Bos taurusGene Names: PSMB1
EC: 3.4.25.1
Find proteins for Q2TBX6 (Bos taurus)
Go to Gene View: PSMB1
Go to UniProtKB:  Q2TBX6
Entity ID: 14
MoleculeChainsSequence LengthOrganismDetails
20S proteasome
N, 2
219Bos taurusGene Names: PSMB4
EC: 3.4.25.1
Find proteins for Q3T108 (Bos taurus)
Go to Gene View: PSMB4
Go to UniProtKB:  Q3T108
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
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 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 316.700α = 90.00
b = 205.900β = 90.00
c = 116.000γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
CCP4data scaling
X-PLORmodel building
CNSrefinement
SCALAdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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