1G2Y

HNF-1ALPHA DIMERIZATION DOMAIN, WITH SELENOMETHIONINE SUBSTITUED AT LEU 12


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

High-resolution structure of the HNF-1alpha dimerization domain.

Rose, R.B.Endrizzi, J.A.Cronk, J.D.Holton, J.Alber, T.

(2000) Biochemistry 39: 15062-15070

  • Primary Citation of Related Structures:  1G2Z, 1G39

  • PubMed Abstract: 
  • The N-terminal dimerization domain of the transcriptional activator hepatocyte nuclear factor-1alpha (HNF-1alpha) is essential for DNA binding and association of the transcriptional coactivator, DCoH (dimerization cofactor of HNF-1). To investigate t ...

    The N-terminal dimerization domain of the transcriptional activator hepatocyte nuclear factor-1alpha (HNF-1alpha) is essential for DNA binding and association of the transcriptional coactivator, DCoH (dimerization cofactor of HNF-1). To investigate the basis for dimerization of HNF-1 proteins, we determined the 1.2 A resolution X-ray crystal structure of the dimerization domain of HNF-1alpha (HNF-p1). Phasing was facilitated by devising a simple synthesis for Fmoc-selenomethionine and substituting leucine residues with selenomethionine. The HNF-1 dimerization domain forms a unique, four-helix bundle that is preserved with localized conformational shifts in the DCoH complex. In three different crystal forms, HNF-p1 displays subtle shifts in the conformation of the interhelix loop and the crossing angle between the amino- and carboxyl-terminal helices. In all three crystal forms, the HNF-p1 dimers pair through an exposed hydrophobic surface that also forms the binding site for DCoH. Conserved core residues in the dimerization domain of the homologous transcriptional regulator HNF-1beta rationalize the functional heterodimerization of the HNF-1alpha and HNF-1beta proteins. Mutations in HNF-1alpha are associated with maturity-onset diabetes of the young type 3 (MODY3), and the structure of HNF-p1 provides insights into the effects of three MODY3 mutations.


    Related Citations: 
    • Structural basis of dimerization, coactivator recognition and MODY3 mutations in HNF-1alpha
      Rose, R.B.,Bayle, J.H.,Endrizzi, J.A.,Cronk, J.D.,Crabtree, G.R.,Alber, T.
      (2000) Nat.Struct.Mol.Biol. 7: 744


    Organizational Affiliation

    Department of Molecular and Cell Biology, 229 Stanley Hall #3206, University of California, Berkeley, California 94720-3206, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEPATOCYTE NUCLEAR FACTOR 1-ALPHA
A, B, C, D
32Mus musculusGene Names: Hnf1a (Hnf-1, Hnf-1a, Tcf1)
Find proteins for P22361 (Mus musculus)
Go to UniProtKB:  P22361
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.195 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 31.270α = 90.00
b = 47.880β = 93.60
c = 40.470γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
MOSFLMdata reduction
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-01-17
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance