3M52

Crystal structure of the BTB domain from the Miz-1/ZBTB17 transcription regulator


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.225 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Insights into Strand Exchange in BTB Domain Dimers from the Crystal Structures of FAZF and Miz1.

Stogios, P.J.Cuesta-Seijo, J.A.Chen, L.Pomroy, N.C.Prive, G.G.

(2010) J.Mol.Biol. 400: 983-997

  • DOI: 10.1016/j.jmb.2010.05.028
  • Primary Citation of Related Structures:  3M5B

  • PubMed Abstract: 
  • The BTB domain is a widely distributed protein-protein interaction motif that is often found at the N-terminus of zinc finger transcription factors. Previous crystal structures of BTB domains have revealed tightly interwound homodimers, with the N-te ...

    The BTB domain is a widely distributed protein-protein interaction motif that is often found at the N-terminus of zinc finger transcription factors. Previous crystal structures of BTB domains have revealed tightly interwound homodimers, with the N-terminus from one chain forming a two-stranded anti-parallel beta-sheet with a strand from the other chain. We have solved the crystal structures of the BTB domains from Fanconi anemia zinc finger (FAZF) and Miz1 (Myc-interacting zinc finger 1) to resolutions of 2.0 A and 2.6 A, respectively. Unlike previous examples of BTB domain structures, the FAZF BTB domain is a nonswapped dimer, with each N-terminal beta-strand associated with its own chain. As a result, the dimerization interface in the FAZF BTB domain is about half as large as in the domain-swapped dimers. The Miz1 BTB domain resembles a typical swapped BTB dimer, although it has a shorter N-terminus that is not able to form the interchain sheet. Using cysteine cross-linking, we confirmed that the promyelocytic leukemia zinc finger (PLZF) BTB dimer is strand exchanged in solution, while the FAZF BTB dimer is not. A phylogenic tree of the BTB fold based on both sequence and structural features shows that the common ancestor of the BTB domain in BTB-ZF (bric à brac, tramtrack, broad-complex zinc finger) proteins was a domain-swapped dimer. The differences in the N-termini seen in the FAZF and Miz1 BTB domains appear to be more recent developments in the structural evolution of the domain.


    Organizational Affiliation

    Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Zinc finger and BTB domain-containing protein 17
A, B
117Homo sapiensGene Names: ZBTB17 (MIZ1, ZNF151, ZNF60)
Find proteins for Q13105 (Homo sapiens)
Go to Gene View: ZBTB17
Go to UniProtKB:  Q13105
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download SDF File 
Download CCD File 
A
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.59 Å
  • R-Value Free: 0.267 
  • R-Value Work: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 33.023α = 90.00
b = 80.935β = 90.00
c = 95.713γ = 90.00
Software Package:
Software NamePurpose
ADSCdata collection
REFMACrefinement
EPMRphasing
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance