3HU6

Structures of SPOP-Substrate Complexes: Insights into Molecular Architectures of BTB-Cul3 Ubiquitin Ligases: SPOPMATHx/BTB/3-box-PucSBC1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structures of SPOP-substrate complexes: insights into molecular architectures of BTB-Cul3 ubiquitin ligases.

Zhuang, M.Calabrese, M.F.Liu, J.Waddell, M.B.Nourse, A.Hammel, M.Miller, D.J.Walden, H.Duda, D.M.Seyedin, S.N.Hoggard, T.Harper, J.W.White, K.P.Schulman, B.A.

(2009) Mol Cell 36: 39-50

  • DOI: 10.1016/j.molcel.2009.09.022
  • Primary Citation of Related Structures:  
    3HQL, 3HQM, 3HQH, 3HQI, 3HSV, 3HU6, 3HTM, 3HVE, 3IVQ, 3IVV

  • PubMed Abstract: 
  • In the largest E3 ligase subfamily, Cul3 binds a BTB domain, and an associated protein-interaction domain such as MATH recruits substrates for ubiquitination. Here, we present biochemical and structural analyses of the MATH-BTB protein, SPOP. We define a SPOP-binding consensus (SBC) and determine structures revealing recognition of SBCs from the phosphatase Puc, the transcriptional regulator Ci, and the chromatin component MacroH2A ...

    In the largest E3 ligase subfamily, Cul3 binds a BTB domain, and an associated protein-interaction domain such as MATH recruits substrates for ubiquitination. Here, we present biochemical and structural analyses of the MATH-BTB protein, SPOP. We define a SPOP-binding consensus (SBC) and determine structures revealing recognition of SBCs from the phosphatase Puc, the transcriptional regulator Ci, and the chromatin component MacroH2A. We identify a dimeric SPOP-Cul3 assembly involving a conserved helical structure C-terminal of BTB domains, which we call "3-box" due to its facilitating Cul3 binding and its resemblance to F-/SOCS-boxes in other cullin-based E3s. Structural flexibility between the substrate-binding MATH and Cul3-binding BTB/3-box domains potentially allows a SPOP dimer to engage multiple SBCs found within a single substrate, such as Puc. These studies provide a molecular understanding of how MATH-BTB proteins recruit substrates to Cul3 and how their dimerization and conformational variability may facilitate avid interactions with diverse substrates.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Speckle-type POZ proteinAB312Homo sapiensMutation(s): 1 
Gene Names: SPOP
Find proteins for O43791 (Homo sapiens)
Explore O43791 
Go to UniProtKB:  O43791
NIH Common Fund Data Resources
PHAROS  O43791
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PuckeredCD7N/AMutation(s): 0 
EC: 3.1.3 (PDB Primary Data), 3.1.3.16 (PDB Primary Data), 3.1.3.48 (PDB Primary Data)
Find proteins for Q9VHV8 (Drosophila melanogaster)
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Go to UniProtKB:  Q9VHV8
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.296 
  • R-Value Work: 0.240 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 63.74α = 90
b = 107.74β = 90
c = 130.79γ = 90
Software Package:
Software NamePurpose
PHASERphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-20
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance