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 
  • R-Value Observed: 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 Biol 9: 90-94

  • DOI: 10.1038/nsb749
  • Primary Citation of Related Structures:  
    1IMH

  • 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 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 ...

    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:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
NUCLEAR FACTOR OF ACTIVATED T CELLS 5C, D281Homo sapiensMutation(s): 0 
Gene Names: NFAT5KIAA0827TONEBP
UniProt & NIH Common Fund Data Resources
Find proteins for O94916 (Homo sapiens)
Explore O94916 
Go to UniProtKB:  O94916
PHAROS:  O94916
Protein Feature View
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  • Reference Sequence
  • Find similar nucleic acids by:  Sequence   |   Structure
  • Entity ID: 1
    MoleculeChainsLengthOrganismImage
    5'-D(*TP*TP*GP*CP*TP*GP*GP*AP*AP*AP*AP*AP*TP*AP*G)-3'A15N/A
    Protein Feature View
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    • Reference Sequence
    • Find similar nucleic acids by:  Sequence   |   Structure
    • Entity ID: 2
      MoleculeChainsLengthOrganismImage
      5'-D(*AP*AP*CP*TP*AP*TP*TP*TP*TP*TP*CP*CP*AP*GP*C)-3'B15N/A
      Protein Feature View
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      • Reference Sequence
      Small Molecules
      Binding Affinity Annotations 
      IDSourceBinding Affinity
      DNA PDBBind:  1IMH Kd: 30 (nM) from 1 assay(s)
      Experimental Data & Validation

      Experimental Data

      • Method: X-RAY DIFFRACTION
      • Resolution: 2.86 Å
      • R-Value Free: 0.290 
      • R-Value Work: 0.244 
      • R-Value Observed: 0.244 
      • Space Group: P 21 21 21
      Unit Cell:
      Length ( Å )Angle ( ˚ )
      a = 59.568α = 90
      b = 95.368β = 90
      c = 158.431γ = 90
      Software Package:
      Software NamePurpose
      MLPHAREphasing
      CNSrefinement
      DENZOdata reduction
      SCALEPACKdata scaling

      Structure Validation

      View Full Validation Report




      Entry History 

      Deposition Data

      Revision History  (Full details and data files)

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