Crystal Structure of the Miz-1 BTB/POZ domain

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 

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A Beta-Sheet Interaction Interface Directs the Tetramerisation of the Miz-1 POZ Domain

Stead, M.A.Trinh, C.H.Garnett, J.A.Carr, S.B.Baron, A.J.Edwards, T.A.Wright, S.C.

(2007) J Mol Biol 373: 820-826

  • DOI: https://doi.org/10.1016/j.jmb.2007.08.026
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The POZ/BTB domain is an evolutionarily conserved motif found in approximately 40 zinc-finger transcription factors (POZ-ZF factors). Several POZ-ZF factors are implicated in human cancer, and POZ domain interaction interfaces represent an attractive target for therapeutic intervention. Miz-1 (Myc-interacting zinc-finger protein) is a POZ-ZF factor that regulates DNA-damage-induced cell cycle arrest and plays an important role in human cancer by virtue of its interaction with the c-Myc and BCL6 oncogene products. The Miz-1 POZ domain mediates both self-association and the recruitment of non-POZ partners. POZ-ZF factors generally function as homodimers, although higher-order associations and heteromeric interactions are known to be physiologically important; crucially, the interaction interfaces in such large complexes have not been characterised. We report here the crystal structure of the Miz-1 POZ domain up to 2.1 A resolution. The tetrameric organisation of Miz-1 POZ reveals two types of interaction interface between subunits; an interface of alpha-helices resembles the dimerisation interface of reported POZ domain structures, whereas a novel beta-sheet interface directs the association of two POZ domain dimers. We show that the beta-sheet interface directs the tetramerisation of the Miz-1 POZ domain in solution and therefore represents a newly described candidate interface for the higher-order homo- and hetero-oligomerisation of POZ-ZF proteins in vivo.

  • Organizational Affiliation

    Molecular Cell Biology Research Group, Institute of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Garstang/Astbury Buildings, Leeds LS2 9JT, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Miz-1 protein
A, B, C, D
119Homo sapiensMutation(s): 0 
Gene Names: ZBTB17MIZ1ZNF151
UniProt & NIH Common Fund Data Resources
Find proteins for Q13105 (Homo sapiens)
Explore Q13105 
Go to UniProtKB:  Q13105
GTEx:  ENSG00000116809 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ13105
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on PG4

Download Ideal Coordinates CCD File 
C8 H18 O5
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.184 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.535α = 90
b = 128.522β = 90
c = 116.038γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-11-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Derived calculations, Version format compliance
  • Version 1.2: 2023-08-30
    Changes: Data collection, Database references, Derived calculations, Refinement description