1IMH

TonEBP/DNA COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.244 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of a TonEBP-DNA complex reveals DNA encircled by a transcription factor.

Stroud, J.C.Lopez-Rodriguez, C.Rao, A.Chen, L.

(2002) Nat.Struct.Mol.Biol. 9: 90-94

  • DOI: 10.1038/nsb749

  • PubMed Abstract: 
  • Tonicity-responsive enhancer binding protein (TonEBP), also known as NFAT5, is a unique member of the NFAT family of transcription factors that regulates gene expression induced by osmotic stress in mammalian cells. Unlike monomeric members of the NF ...

    Tonicity-responsive enhancer binding protein (TonEBP), also known as NFAT5, is a unique member of the NFAT family of transcription factors that regulates gene expression induced by osmotic stress in mammalian cells. Unlike monomeric members of the NFAT family, TonEBP exists as a homodimer and binds asymmetric TonE DNA sites; furthermore, the affinity of TonEBP for DNA is much lower than that of other NFAT proteins. How TonEBP recognizes the TonE site and regulates the activation of hypertonicity response genes has not been clear. Here we show that TonEBP adopts a NF-kappaB-like structure upon binding to DNA, providing a direct structural link between the NFAT and NF-kappaB family of transcription factors. We also show that TonEBP completely encircles its DNA target and present biochemical evidence that the DNA encirclement may lead to increased kinetic stability of the TonEBP-DNA complex. Thus, the list of proteins that bind DNA by encirclement is now expanded to include sequence-specific transcription factors.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Colorado at Boulder, Boulder, Colorado 80309-0215, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
NUCLEAR FACTOR OF ACTIVATED T CELLS 5
C, D
281Homo sapiensMutation(s): 0 
Gene Names: NFAT5 (KIAA0827, TONEBP)
Find proteins for O94916 (Homo sapiens)
Go to Gene View: NFAT5
Go to UniProtKB:  O94916
Entity ID: 1
MoleculeChainsLengthOrganism
5'-D(*TP*TP*GP*CP*TP*GP*GP*AP*AP*AP*AP*AP*TP*AP*G)-3'A15N/A
Entity ID: 2
MoleculeChainsLengthOrganism
5'-D(*AP*AP*CP*TP*AP*TP*TP*TP*TP*TP*CP*CP*AP*GP*C)-3'B15N/A
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.244 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 59.568α = 90.00
b = 95.368β = 90.00
c = 158.431γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MLPHAREphasing
DENZOdata reduction
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-01
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-04-04
    Type: Data collection