3H8K

Crystal structure of Ube2g2 complxed with the G2BR domain of gp78 at 1.8-A resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.193 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Allosteric activation of E2-RING finger-mediated ubiquitylation by a structurally defined specific E2-binding region of gp78.

Das, R.Mariano, J.Tsai, Y.C.Kalathur, R.C.Kostova, Z.Li, J.Tarasov, S.G.McFeeters, R.L.Altieri, A.S.Ji, X.Byrd, R.A.Weissman, A.M.

(2009) Mol.Cell 34: 674-685

  • DOI: 10.1016/j.molcel.2009.05.010

  • PubMed Abstract: 
  • The activity of RING finger ubiquitin ligases (E3) is dependent on their ability to facilitate transfer of ubiquitin from ubiquitin-conjugating enzymes (E2) to substrates. The G2BR domain within the E3 gp78 binds selectively and with high affinity to ...

    The activity of RING finger ubiquitin ligases (E3) is dependent on their ability to facilitate transfer of ubiquitin from ubiquitin-conjugating enzymes (E2) to substrates. The G2BR domain within the E3 gp78 binds selectively and with high affinity to the E2 Ube2g2. Through structural and functional analyses, we determine that this occurs on a region of Ube2g2 distinct from binding sites for ubiquitin-activating enzyme (E1) and RING fingers. Binding to the G2BR results in conformational changes in Ube2g2 that affect ubiquitin loading. The Ube2g2:G2BR interaction also causes an approximately 50-fold increase in affinity between the E2 and RING finger. This results in markedly increased ubiquitylation by Ube2g2 and the gp78 RING finger. The significance of this G2BR effect is underscored by enhanced ubiquitylation observed when Ube2g2 is paired with other RING finger E3s. These findings uncover a mechanism whereby allosteric effects on an E2 enhance E2-RING finger interactions and, consequently, ubiquitylation.


    Organizational Affiliation

    Structural Biophysics Laboratory, Center for Cancer Research, National Cancer Institute, Frederick, MD 21702-1201, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-conjugating enzyme E2 G2
A
164Homo sapiensMutation(s): 0 
Gene Names: UBE2G2
EC: 2.3.2.23
Find proteins for P60604 (Homo sapiens)
Go to Gene View: UBE2G2
Go to UniProtKB:  P60604
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Autocrine motility factor receptor, isoform 2
B
28Homo sapiensMutation(s): 1 
Gene Names: AMFR (RNF45)
EC: 2.3.2.27
Find proteins for Q9UKV5 (Homo sapiens)
Go to Gene View: AMFR
Go to UniProtKB:  Q9UKV5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.193 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 48.920α = 90.00
b = 60.150β = 90.00
c = 61.640γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
HKL-2000data collection
SCALEPACKdata scaling
DENZOdata reduction
PDB_EXTRACTdata extraction
PHASERphasing
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-04-25
    Type: Structure summary
  • Version 1.3: 2017-11-01
    Type: Refinement description