1JAT

Mms2/Ubc13 Ubiquitin Conjugating Enzyme Complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular insights into polyubiquitin chain assembly: crystal structure of the Mms2/Ubc13 heterodimer.

VanDemark, A.P.Hofmann, R.M.Tsui, C.Pickart, C.M.Wolberger, C.

(2001) Cell 105: 711-720

  • DOI: 10.1016/s0092-8674(01)00387-7
  • Primary Citation of Related Structures:  
    1JBB, 1JAT

  • PubMed Abstract: 
  • While the signaling properties of ubiquitin depend on the topology of polyubiquitin chains, little is known concerning the molecular basis of specificity in chain assembly and recognition. UEV/Ubc complexes have been implicated in the assembly of Lys ...

    While the signaling properties of ubiquitin depend on the topology of polyubiquitin chains, little is known concerning the molecular basis of specificity in chain assembly and recognition. UEV/Ubc complexes have been implicated in the assembly of Lys63-linked polyubiquitin chains that act as a novel signal in postreplicative DNA repair and I kappa B alpha kinase activation. The crystal structure of the Mms2/Ubc13 heterodimer shows the active site of Ubc13 at the intersection of two channels that are potential binding sites for the two substrate ubiquitins. Mutations that destabilize the heterodimer interface confer a marked UV sensitivity, providing direct evidence that the intact heterodimer is necessary for DNA repair. Selective mutations in the channels suggest a molecular model for specificity in the assembly of Lys63-linked polyubiquitin signals.


    Organizational Affiliation

    Department of Biophysics and Biophysical Chemistry, School of Medicine, Johns Hopkins University, Baltimore, MD, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-Conjugating Enzyme E2-17.5 KDAA155Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: UBC13
EC: 6.3.2.19 (PDB Primary Data), 2.3.2.23 (UniProt)
Find proteins for P52490 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Go to UniProtKB:  P52490
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-Conjugating Enzyme Variant Mms2B138Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MMS2
Find proteins for P53152 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P53152 
Go to UniProtKB:  P53152
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.158α = 90
b = 63.797β = 105.83
c = 53.152γ = 90
Software Package:
Software NamePurpose
EPMRphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-06-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance