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CRYSTAL STRUCTURE OF THE SACCHAROMYCES CEREVISIAE UBIQUITIN-CONJUGATING ENZYME RAD6 (UBC2) AT 2.6A RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the Saccharomyces cerevisiae ubiquitin-conjugating enzyme Rad6 at 2.6 A resolution.

Worthylake, D.K.Prakash, S.Prakash, L.Hill, C.P.

(1998) J.Biol.Chem. 273: 6271-6276


  • PubMed Abstract: 
  • The Saccharomyces cerevisiae ubiquitin-conjugating enzyme (UBC) Rad6 is required for several functions, including the repair of UV damaged DNA, damage-induced mutagenesis, sporulation, and the degradation of cellular proteins that possess destabilizi ...

    The Saccharomyces cerevisiae ubiquitin-conjugating enzyme (UBC) Rad6 is required for several functions, including the repair of UV damaged DNA, damage-induced mutagenesis, sporulation, and the degradation of cellular proteins that possess destabilizing N-terminal residues. Rad6 mediates its role in N-end rule-dependent protein degradation via interaction with the ubiquitin-protein ligase Ubr1 and in DNA repair via interactions with the DNA binding protein Rad18. We report here the crystal structure of Rad6 refined at 2.6 A resolution to an R factor of 21.3%. The protein adopts an alpha/beta fold that is very similar to other UBC structures. An apparent difference at the functionally important first helix, however, has prompted a reassessment of previously reported structures. The active site cysteine lies in a cleft formed by a coil region that includes the 310 helix and a loop that is in different conformations for the three molecules in the asymmetric unit. Residues important for Rad6 interaction with Ubr1 and Rad18 are on the opposite side of the structure from the active site, indicating that this part of the UBC surface participates in protein-protein interactions that define Rad6 substrate specificity.


    Organizational Affiliation

    Biochemistry Department, University of Utah, Salt Lake City, Utah 84132, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
UBIQUITIN-CONJUGATING ENZYME RAD6
A, B, C
169Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: RAD6 (UBC2)
EC: 2.3.2.23
Find proteins for P06104 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P06104
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.213 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 113.750α = 90.00
b = 146.360β = 90.00
c = 109.880γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
DENZOdata reduction
SCALEPACKdata scaling
X-PLORrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-26
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance