4F52

Structure of a Glomulin-RBX1-CUL1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of a Glomulin-RBX1-CUL1 Complex: Inhibition of a RING E3 Ligase through Masking of Its E2-Binding Surface.

Duda, D.M.Olszewski, J.L.Tron, A.E.Hammel, M.Lambert, L.J.Waddell, M.B.Mittag, T.Decaprio, J.A.Schulman, B.A.

(2012) Mol.Cell 47: 371-382

  • DOI: 10.1016/j.molcel.2012.05.044

  • PubMed Abstract: 
  • The approximately 300 human cullin-RING ligases (CRLs) are multisubunit E3s in which a RING protein,¬†either RBX1 or RBX2, recruits an E2 to catalyze ubiquitination. RBX1-containing CRLs also can bind Glomulin (GLMN), which binds RBX1's RING domain, r ...

    The approximately 300 human cullin-RING ligases (CRLs) are multisubunit E3s in which a RING protein, either RBX1 or RBX2, recruits an E2 to catalyze ubiquitination. RBX1-containing CRLs also can bind Glomulin (GLMN), which binds RBX1's RING domain, regulates the RBX1-CUL1-containing SCF(FBW7) complex, and is disrupted in the disease Glomuvenous Malformation. Here we report the crystal structure of a complex between GLMN, RBX1, and a fragment of CUL1. Structural and biochemical analyses reveal that GLMN adopts a HEAT-like repeat fold that tightly binds the E2-interacting surface of RBX1, inhibiting CRL-mediated chain formation by the E2 CDC34. The structure explains the basis for GLMN's selectivity toward RBX1 over RBX2, and how disease-associated mutations disrupt GLMN-RBX1 interactions. Our study reveals a mechanism for RING E3 ligase regulation, whereby an inhibitor blocks E2 access, and raises the possibility that other E3s are likewise controlled by cellular proteins that mask E2-binding surfaces to mediate inhibition.


    Organizational Affiliation

    Department of Structural Biology, St. Jude Children's Research Hospital, Memphis TN 38105, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cullin-1
A, C
282Homo sapiensMutation(s): 4 
Gene Names: CUL1
Find proteins for Q13616 (Homo sapiens)
Go to Gene View: CUL1
Go to UniProtKB:  Q13616
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
E3 ubiquitin-protein ligase RBX1
B, D
106Homo sapiensMutation(s): 0 
Gene Names: RBX1 (RNF75, ROC1)
EC: 2.3.2.27, 2.3.2.32
Find proteins for P62877 (Homo sapiens)
Go to Gene View: RBX1
Go to UniProtKB:  P62877
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Glomulin
E, F
596Homo sapiensMutation(s): 0 
Gene Names: GLMN (FAP48, FAP68, VMGLOM)
Find proteins for Q92990 (Homo sapiens)
Go to Gene View: GLMN
Go to UniProtKB:  Q92990
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.219 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 53.333α = 90.00
b = 193.932β = 98.81
c = 142.075γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
PHENIXphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-19
    Type: Initial release