1AAR

STRUCTURE OF A DIUBIQUITIN CONJUGATE AND A MODEL FOR INTERACTION WITH UBIQUITIN CONJUGATING ENZYME (E2)

• PDB DOI: https://doi.org/10.2210/pdb1AAR/pdb

• Classification: UBIQUITIN
• Organism(s): Bos taurus
• Mutation(s): No 


• Deposited: 1992-04-17 Released: 1993-10-31 
• Deposition Author(s): Cook, W.J., Jeffrey, L.C., Carson, M., Chen, Z., Pickart, C.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

Structure of a diubiquitin conjugate and a model for interaction with ubiquitin conjugating enzyme (E2).

Cook, W.J., Jeffrey, L.C., Carson, M., Chen, Z., Pickart, C.M.

(1992) J Biol Chem 267: 16467-16471

• PubMed: 1322903 
• DOI: https://doi.org/10.2210/pdb1aar/pdb
• Primary Citation of Related Structures:  
  1AAR


• PubMed Abstract: 
  

  Covalent ligation of multiubiquitin chains targets eukaryotic proteins for degradation. In such multiubiquitin chains, successive ubiquitins are linked by an isopeptide bond involving the side chain of Lys48 and the carboxyl group of Gly76. The crystal structure of a diubiquitin conjugate has been determined and refined at 2.3-A resolution. The molecule has internal approximate 2-fold symmetry with multiple hydrophobic and hydrophilic contacts along the 2-fold axis. The structure of the diubiquitin conjugate suggests determinants for recognition of multiubiquitin chains. A model for the interaction of diubiquitin and a ubiquitin conjugating enzyme (E2) is proposed.

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Organizational Affiliation: 

Department of Pathology, University of Alabama, Birmingham 35294.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 17.15 kDa 
• Atom Count: 1,218 
• Modelled Residue Count: 152 
• Deposited Residue Count: 152 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DI-UBIQUITIN	A, B	76	Bos taurus	Mutation(s): 0
UniProt
Find proteins for P0CH28 (Bos taurus) Explore P0CH28  Go to UniProtKB:  P0CH28

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 32.1	α = 105.9
b = 46.2	β = 113.3
c = 25.4	γ = 69.7

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1993-10-31 
Deposition Author(s): Cook, W.J., Jeffrey, L.C., Carson, M., Chen, Z., Pickart, C.M.

Revision History  

• Version 1.0: 1993-10-31
  Type: Initial release
  
• Version 1.1: 2008-03-10
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance