Biological Assembly 1  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Validation Report | Ligand Interaction

Global Symmetry: Dihedral - D2  (3D View)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 98.05 kDa 
• Atom Count: 6881 
• Modelled Residue Count: 792 
• Deposited Residue Count: 832 
• Unique protein chains: 1

1DCP

DCOH, A BIFUNCTIONAL PROTEIN-BINDING TRANSCRIPTIONAL COACTIVATOR, COMPLEXED WITH BIOPTERIN

• PDB DOI: 10.2210/pdb1DCP/pdb

• Classification: TRANSCRIPTIONAL STIMULATOR
• Organism(s): Rattus norvegicus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1996-05-16 Released: 1996-12-07 
• Deposition Author(s): Cronk, J.D., Endrizzi, J.A., Alber, T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å

Literature

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

• PubMed: 8897596 
• DOI: 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.

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Related Citations: 

• Crystal Structure of DCoH, a Bifunctional, Protein-Binding Transcriptional Coactivator
  Endrizzi, J.A., Cronk, J.D., Wang, W., Crabtree, G.R., Alber, T.
  (1995) Science 268: 556

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
DCOH	A, B, C, D, E, F, G, H	104	Rattus norvegicus	Mutation(s): 0  Gene Names: Pcbd1, Dcoh, Pcbd EC: 4.2.1.96
UniProt
Find proteins for P61459 (Rattus norvegicus) Explore P61459  Go to UniProtKB:  P61459

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HBI	I [auth A], J [auth B], K [auth C], L [auth D], M [auth E], N [auth F], O [auth G], P [auth H]	7,8-DIHYDROBIOPTERIN C9 H13 N5 O3 FEMXZDUTFRTWPE-DZSWIPIPSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 105.7	α = 90
b = 105.7	β = 90
c = 196.17	γ = 120

Software Package:

Software Name	Purpose
TNT	refinement
R-AXIS	data reduction
R-AXIS	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1996-05-16 
• Released Date: 1996-12-07 
Deposition Author(s): Cronk, J.D., Endrizzi, J.A., Alber, T.

Revision History  

• 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