1F93

CRYSTAL STRUCTURE OF A COMPLEX BETWEEN THE DIMERIZATION DOMAIN OF HNF-1 ALPHA AND THE COACTIVATOR DCOH


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

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: 744-748

  • DOI: 10.1038/78966

  • PubMed Abstract: 
  • Maturity-onset diabetes of the young type 3 (MODY3) results from mutations in the transcriptional activator hepatocyte nuclear factor-1alpha (HNF-1alpha). Several MODY3 mutations target the HNF-1alpha dimerization domain (HNF-p1), which binds the coa ...

    Maturity-onset diabetes of the young type 3 (MODY3) results from mutations in the transcriptional activator hepatocyte nuclear factor-1alpha (HNF-1alpha). Several MODY3 mutations target the HNF-1alpha dimerization domain (HNF-p1), which binds the coactivator, dimerization cofactor of HNF-1 (DCoH). To define the mechanism of coactivator recognition and the basis for the MODY3 phenotype, we determined the cocrystal structure of the DCoH-HNF-p1 complex and characterized biochemically the effects of MODY3 mutations in HNF-p1. The DCoH-HNF-p1 complex comprises a dimer of dimers in which HNF-p1 forms a unique four-helix bundle. Through rearrangements of interfacial side chains, a single, bifunctional interface in the DCoH dimer mediates both HNF-1alpha binding and formation of a competing, transcriptionally inactive DCoH homotetramer. Consistent with the structure, MODY3 mutations in HNF-p1 reduce activator function by two distinct mechanisms.


    Related Citations: 
    • Crystal structure of DCoH, a bifunctional, protein-binding transcriptional coactivator
      Endrizzi, J.A.,Cronk, J.D.,Weidong, W.,Crabtree, G.R.,Alber, T.
      (1995) Science 268: 556
    • High-resolution structures of the bifunctional enzyme and transcriptional coactivator DCoH and its complex with a product analogue
      Cronk, J.D.,Endrizzi, J.A.,Alber, T.
      (1996) Protein Sci. 5: 1963


    Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, Berkeley, California 94720-3206, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DIMERIZATION COFACTOR OF HEPATOCYTE NUCLEAR FACTOR 1-ALPHA
A, B, C, D
104Rattus norvegicusGene Names: Pcbd1 (Dcoh, Pcbd)
EC: 4.2.1.96
Find proteins for P61459 (Rattus norvegicus)
Go to UniProtKB:  P61459
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HEPATOCYTE NUCLEAR FACTOR 1-ALPHA
E, F, G, H
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: 2.6 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.257 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 49.480α = 90.00
b = 82.750β = 97.83
c = 70.640γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
MOSFLMdata reduction
CNSrefinement
CCP4data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-09-20
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance