Macromolecule Content

• Total Structure Weight: 13049.02 
• Atom Count: 759 
• Residue Count: 109 
• Unique protein chains: 1

2HFH

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

• DOI: 10.2210/pdb2HFH/pdb

• Classification: HNF-3 HOMOLOGUES
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli


• Deposited: 1998-01-27 Released: 1998-06-17 
• Deposition Author(s): Marsden, I., Jin, C., Liao, X.

---

Experimental Data Snapshot

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

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

• PubMed: 9571051 
• DOI: 10.1006/jmbi.1998.1703


• 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. 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: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
GENESIS	A	109	Rattus norvegicus	Mutation(s): 0  Gene Names: Foxd3 (Hfh2)
Find proteins for Q63245 (Rattus norvegicus) Go to UniProtKB:  Q63245

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-01-27 
• Released Date: 1998-06-17 
• Deposition Author(s): Marsden, I., Jin, C., Liao, X.

Revision History 

• Version 1.0: 1998-06-17
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance