4EOZ

Crystal structure of the SPOP BTB domain complexed with the Cul3 N-terminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Adaptor protein self-assembly drives the control of a cullin-RING ubiquitin ligase.

Errington, W.J.Khan, M.Q.Bueler, S.A.Rubinstein, J.L.Chakrabartty, A.Prive, G.G.

(2012) Structure 20: 1141-1153

  • DOI: 10.1016/j.str.2012.04.009

  • PubMed Abstract: 
  • The E3 ligases recruit substrate proteins for targeted ubiquitylation. Recent insights into the mechanisms of ubiquitylation demonstrate that E3 ligases can possess active regulatory properties beyond those of a simple assembly scaffold. Here, we des ...

    The E3 ligases recruit substrate proteins for targeted ubiquitylation. Recent insights into the mechanisms of ubiquitylation demonstrate that E3 ligases can possess active regulatory properties beyond those of a simple assembly scaffold. Here, we describe the dimeric structure of the E3 ligase adaptor protein SPOP (speckle-type POZ protein) in complex with the N-terminal domain of Cul3 at 2.4 Å resolution. We find that SPOP forms large oligomers that can form heteromeric species with the closely related paralog SPOPL. In combination, SPOP and SPOPL (SPOP-like) form a molecular rheostat that can fine-tune E3 ubiquitin ligase activity by affecting the oligomeric state of the E3 complex. We propose that adaptor protein self-assembly provides a graded level of regulation of the SPOP/Cul3 E3 ligase toward its multiple protein substrates.


    Organizational Affiliation

    Department of Biochemistry, University of Toronto, 1 Kings College Circle, Toronto, Ontario M5S 1A8, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Speckle-type POZ protein
A, C
145Homo sapiensMutation(s): 0 
Gene Names: SPOP
Find proteins for O43791 (Homo sapiens)
Go to Gene View: SPOP
Go to UniProtKB:  O43791
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cullin-3
B, D
364Homo sapiensMutation(s): 2 
Gene Names: CUL3 (KIAA0617)
Find proteins for Q13618 (Homo sapiens)
Go to Gene View: CUL3
Go to UniProtKB:  Q13618
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
B, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.211 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 213.166α = 90.00
b = 76.944β = 108.34
c = 85.834γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data scaling
SOLVEphasing
HKL-3000data collection
HKL-3000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2013-01-09
    Type: Database references