Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 11941.45 
• Atom Count: 542 
• Residue Count: 110 
• Unique protein chains: 1

4HS2

Crystal Structure of the Human SPOP C-terminal Domain

• DOI: 10.2210/pdb4HS2/pdb

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): 3 


• Deposited: 2012-10-29 Released: 2013-09-11 
• Deposition Author(s): Van Geersdaele, L.K., Stead, M.A., Carr, S.B., Wright, S.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.53 Å
• R-Value Free: 0.151 
• R-Value Work: 0.132 

Literature

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

van 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

• PubMed: 23999291 
• DOI: 10.1107/S0907444913012687
• Primary Citation of Related Structures:  
  4J8Z


• 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 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.

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Organizational Affiliation: 

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

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Speckle-type POZ protein	A	110	Homo sapiens	Mutation(s): 3  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: 1.53 Å
• R-Value Free: 0.151 
• R-Value Work: 0.132 
• Space Group: P 6₁ 2 2

Unit Cell:

Length (Å)	Angle (°)
a = 57.650	α = 90.00
b = 57.650	β = 90.00
c = 102.810	γ = 120.00

Software Package:

Software Name	Purpose
XDS	data reduction
SCALA	data scaling
XDS	data scaling
SHELXS	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-10-29 
• Released Date: 2013-09-11 
• Deposition Author(s): Van Geersdaele, L.K., Stead, M.A., Carr, S.B., Wright, S.C.

Revision History 

• Version 1.0: 2013-09-11
  Type: Initial release
• Version 1.1: 2014-01-15
  Type: Database references