2HFH

THE NMR STRUCTURES OF A WINGED HELIX PROTEIN: GENESIS, 20 STRUCTURES


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST TARGET FUNCTION 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural changes in the region directly adjacent to the DNA-binding helix highlight a possible mechanism to explain the observed changes in the sequence-specific binding of winged helix proteins.

Marsden, I.Jin, C.Liao, X.

(1998) J Mol Biol 278: 293-299

  • DOI: 10.1006/jmbi.1998.1703
  • Primary Citation of Related Structures:  
    2HFH

  • PubMed Abstract: 
  • The hepatocyte nuclear factor 3 (HNF-3)/fork head (fkh) family contains a large number of transcription factors and folds into a winged helix motif. Despite having almost invariable amino acid sequences in their principal DNA-binding helices, HNF-3/fkh proteins show a wide diversity of sequence-specific binding ...

    The hepatocyte nuclear factor 3 (HNF-3)/fork head (fkh) family contains a large number of transcription factors and folds into a winged helix motif. Despite having almost invariable amino acid sequences in their principal DNA-binding helices, HNF-3/fkh proteins show a wide diversity of sequence-specific binding. Previous studies of chimeric HNF-3/fkh proteins demonstrated that the binding specificity is primarily influenced by a region directly adjacent to the binding helix. We report our findings of an NMR structural study performed on an HNF-3/fkh family member (Genesis, formerly HFH-2) and compare it to that of another family member (HNF-3gamma) complexed to DNA and determined by X-ray crystallography. It is found that in comparison to HNF-3gamma, Genesis contains an extra small helix directly prior to the N terminus of the primary DNA contact helix. Due to the insertion of this helix, a shorter and slightly re-positioned primary DNA contact helix is observed, which we believe leads to the DNA-binding specificity differences among family members.


    Related Citations: 
    • Evidence that the DNA Binding Specificity of Winged Helix Proteins is Mediated by a Structural Change in the Amino Acid Sequence Adjacent to the Principal DNA Binding Helix
      Marsden, I., Chen, Y., Jin, C., Liao, X.
      (1997) Biochemistry 36: 13248

    Organizational Affiliation

    College of Medicine, University of Illinois at Chicago, 1819 West Polk Street, Chicago, IL 60612, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GENESISA109Rattus norvegicusMutation(s): 0 
Gene Names: HFH-2GENESISFoxd3Hfh2
UniProt
Find proteins for Q63245 (Rattus norvegicus)
Explore Q63245 
Go to UniProtKB:  Q63245
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ63245
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: LOWEST TARGET FUNCTION 
  • OLDERADO: 2HFH Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-06-17
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2022-03-09
    Changes: Database references, Derived calculations, Other