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

Structural Biology Knowledgebase: 1IRU SBKB.org

Experimental Data Snapshot

  • Resolution: 2.75 Å
  • R-Value Free: 0.294
  • R-Value Work: 0.250

wwPDB Validation Full Report


Sequence Display for 1IRU

Classification: HYDROLASE

Total Structure Weight: 718074.31

Macromolecule Entities
Molecule Chains Length Organism Details
20S proteasome A, O 246 Bos taurus Gene Name(s): PSMA6 Gene View
20S proteasome B, P 233 Bos taurus Gene Name(s): PSMA2 Gene View
20S proteasome C, Q 261 Bos taurus Gene Name(s): PSMA4 Gene View
20S proteasome D, R 248 Bos taurus Gene Name(s): PSMA7 Gene View
20S proteasome E, S 241 Bos taurus Gene Name(s): PSMA5 Gene View
20S proteasome F, T 263 Bos taurus Gene Name(s): PSMA1 Gene View
20S proteasome G, U 254 Bos taurus Gene Name(s): PSMA3 Gene View
20S proteasome H, V 205 Bos taurus Gene Name(s): PSMB6 Gene View
20S proteasome I, W 234 Bos taurus Gene Name(s): PSMB7 Gene View
20S proteasome J, X 205 Bos taurus Gene Name(s): PSMB3 Gene View
20S proteasome K, Y 201 Bos taurus Gene Name(s): PSMB2 Gene View
20S proteasome L, Z 204 Bos taurus Gene Name(s): PSMB5 Gene View
20S proteasome 1, M 213 Bos taurus Gene Name(s): PSMB1 Gene View
20S proteasome 2, N 219 Bos taurus Gene Name(s): PSMB4 Gene View

Small Molecules
Ligands 1 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
Query on MG

1, A, B, C, D, G, I, J, K, M, O, P, Q, R, U, W, X, Y MAGNESIUM ION
Ligand Explorer
Binding Pocket (JSmol)
Electron Density (JSmol)

Experimental Data & Validation

Experimental Data

  • Resolution: 2.75 Å
  • R-Value Free: 0.294
  • R-Value Work: 0.250
  • Space Group: P 21 21 21
  • Electron Density Server: EDS EDS

Unit Cell:

Length (Å) Angle (°)
a = 316.70 α = 90.00
b = 205.90 β = 90.00
c = 116.00 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots

Entry History

Deposition Data

  • Deposited Date: 2001-10-24
  • Released Date: 2002-05-22
  • Deposition author(s): Unno, M., Mizushima, T., Morimoto, Y., Tomisugi, Y., Tanaka, K., Yasuoka, N., Tsukihara, T.

Revision History

  • 2011-07-13
    Type: Version format compliance | Details: compliance with PDB Exchange Dictionary V4