Experimental Data Snapshot

  • Resolution: 2.30 Å

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This is version 1.3 of the entry. See complete history


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: 1963-1972

  • DOI: https://doi.org/10.1002/pro.5560051002
  • Primary Citation of Related Structures:  
    1DCO, 1DCP

  • PubMed Abstract: 

    DCoH, the dimerization cofactor of hepatocyte nuclear factor 1 (HNF-1), functions as both a transcriptional coactivator and a pterin dehydratase. To probe the relationship between these two functions, the X-ray crystal structures of the free enzyme and its complex with the product analogue 7,8-dihydrobiopterin were refined at 2.3 A resolution. The ligand binds at four sites per tetrameric enzyme, with little apparent conformational change in the protein. Each active-site cleft is located in a subunit interface, adjacent to a prominent saddle motif that has structural similarities to the TATA binding protein. The pterin binds within an arch of aromatic residues that extends across one dimer interface. The bound ligand makes contacts to three conserved histidines, and this arrangement restricts proposals for the enzymatic mechanism of dehydration. The dihedral symmetry of DCoH suggests that binding to the dimerization domain of HNF-1 likely involves the superposition of two-fold rotation axes of the two proteins.

  • Organizational Affiliation

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

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H
104Rattus norvegicusMutation(s): 0 
Find proteins for P61459 (Rattus norvegicus)
Explore P61459 
Go to UniProtKB:  P61459
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61459
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.65α = 90
b = 105.65β = 90
c = 196.23γ = 120
Software Package:
Software NamePurpose
R-AXISdata reduction
R-AXISdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-12-07
    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: 2024-02-07
    Changes: Data collection, Database references, Other