Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 13.36 kDa 
• Atom Count: 997 
• Residue Count: 115 
• Unique protein chains: 1

2IF5

Structure of the POZ domain of human LRF, a master regulator of oncogenesis

• DOI: 10.2210/pdb2IF5/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2006-09-20 Released: 2006-11-21 
• Deposition Author(s): Schubot, F.D., Waugh, D.S., Tropea, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.291 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 

Literature

Structure of the POZ domain of human LRF, a master regulator of oncogenesis.

Schubot, F.D., Tropea, J.E., Waugh, D.S.

(2006) Biochem Biophys Res Commun 351: 1-6

• PubMed: 17052694 
• DOI: 10.1016/j.bbrc.2006.09.167
• Primary Citation of Related Structures:  
  2IF5


• PubMed Abstract: 
  

The proto-oncogenic properties of the POK family of transcriptional repressors BCL6, PLZF, and LRF have been well established. These proteins utilize their amino-terminal POZ domains for multimerization and the recruitment of co-repressors. Because LRF represses the production of the tumor suppressor p19(Arf) (ARF), it is regarded as an attractive therapeutic target for the treatment of many types of cancer. The crystal structure of the LRF POZ domain reveals a high degree of structural conservation with the corresponding domains of BCL6 and PLZF. However, striking differences between the electrostatic properties of the BCL6 and LRF POZ domains suggest that if, like BCL6, LRF interacts with the co-repressor SMRT, it almost certainly uses a different mechanism to do so. These differences may also explain why LRF interacts with BCL6 but not with PLZF. Finally, the conservation of crystal packing contacts suggests the probable location of the interface that mediates LRF/BCL6 complex formation.

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Organizational Affiliation: 

Macromolecular Crystallography Laboratory, National Cancer Institute at Frederick, P.O. Box B, Frederick, MD 21702-1201, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Zinc finger and BTB domain-containing protein 7A	A	120	Homo sapiens	Mutation(s): 0  Gene Names: ZBTB7A, FBI1, LRF, ZBTB7, ZNF857A
Find proteins for O95365 (Homo sapiens) Explore O95365  Go to UniProtKB:  O95365
NIH Common Fund Data Resources
PHAROS:  O95365 GTEx:  ENSG00000178951

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PR	A	PRASEODYMIUM ION Pr WCWKKSOQLQEJTE-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 0.291 
• R-Value Work: 0.229 
• R-Value Observed: 0.232 
• Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.85	α = 90
b = 65.85	β = 90
c = 162.603	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2006-09-20 
• Released Date: 2006-11-21 
Deposition Author(s): Schubot, F.D., Waugh, D.S., Tropea, J.

Revision History 

• Version 1.0: 2006-11-21
  Type: Initial release
  
• Version 1.1: 2008-05-01
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Derived calculations, Version format compliance