4J8Z

Crystal Structure of the Human SPOP BTB Domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.207 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural basis of high-order oligomerization of the cullin-3 adaptor SPOP

Geersdaele, L.K.Stead, M.A.Harrison, C.M.Carr, S.B.Close, H.J.Rosbrook, G.O.Connell, S.D.Wright, S.C.

(2013) Acta Crystallogr.,Sect.D 69: 1677-1684

  • DOI: 10.1107/S0907444913012687
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Protein ubiquitination in eukaryotic cells is mediated by diverse E3 ligase enzymes that each target specific substrates. The cullin E3 ligase complexes are the most abundant class of E3 ligases; they contain various cullin components that serve as s ...

    Protein ubiquitination in eukaryotic cells is mediated by diverse E3 ligase enzymes that each target specific substrates. The cullin E3 ligase complexes are the most abundant class of E3 ligases; they contain various cullin components that serve as scaffolds for interaction with substrate-recruiting adaptor proteins. SPOP is a BTB-domain adaptor of the cullin-3 E3 ligase complexes; it selectively recruits substrates via its N-terminal MATH domain, whereas its BTB domain mediates dimerization and interactions with cullin-3. It has recently been recognized that the high-order oligomerization of SPOP enhances the ubiquitination of substrates. Here, a dimerization interface in the SPOP C-terminus is identified and it is shown that the dimerization interfaces of the BTB domain and of the C-terminus act independently and in tandem to generate high-order SPOP oligomers. The crystal structure of the dimeric SPOP C-terminal domain is reported at 1.5 Å resolution and it is shown that Tyr353 plays a critical role in high-order oligomerization. A model of the high-order SPOP oligomer is presented that depicts a helical organization that could enhance the efficiency of substrate ubiquitination.


    Organizational Affiliation

    School of Biology, University of Leeds, Leeds LS2 9JT, England.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Speckle-type POZ protein
A, B
211Homo sapiensMutation(s): 1 
Gene Names: SPOP
Find proteins for O43791 (Homo sapiens)
Go to Gene View: SPOP
Go to UniProtKB:  O43791
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.42 Å
  • R-Value Free: 0.255 
  • R-Value Work: 0.207 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 111.390α = 90.00
b = 71.580β = 117.21
c = 62.220γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction
REFMACrefinement
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-09-11
    Type: Initial release
  • Version 1.1: 2014-01-22
    Type: Database references