1SG6

Crystal structure of Aspergillus nidulans 3-dehydroquinate synthase (AnDHQS) in complex with Zn2+ and NAD+, at 1.7D


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.250 

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This is version 1.3 of the entry. See complete history


Literature

Structure of the 'open' form of Aspergillus nidulans 3-dehydroquinate synthase at 1.7 A resolution from crystals grown following enzyme turnover.

Nichols, C.E.Hawkins, A.R.Stammers, D.K.

(2004) Acta Crystallogr D Biol Crystallogr 60: 971-973

  • DOI: 10.1107/S0907444904004743
  • Primary Citation of Related Structures:  
    1SG6

  • PubMed Abstract: 
  • Crystallization of Aspergillus nidulans 3-dehydroquinate synthase (DHQS), following turnover of the enzyme by addition of the substrate DAHP, gave a new crystal form (form J). Although the crystals have dimensions of only 50 x 20 x 5 micro m, they are well ordered, diffracting to 1 ...

    Crystallization of Aspergillus nidulans 3-dehydroquinate synthase (DHQS), following turnover of the enzyme by addition of the substrate DAHP, gave a new crystal form (form J). Although the crystals have dimensions of only 50 x 20 x 5 micro m, they are well ordered, diffracting to 1.7 A. The space group is C222(1), with unit-cell parameters a = 90.0, b = 103.7, c = 177.4 A. Structure determination and refinement to R = 0.19 (R(free) = 0.25) shows the DHQS is in the 'open' form with the substrate site unoccupied but with some loop regions perturbed. Previous crystals of open-form DHQS only diffracted to 2.5 A resolution. The use of enzyme turnover may be applicable in other systems in attempts to improve crystal quality.


    Organizational Affiliation

    Division of Structural Biology, The Wellcome Trust Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford OX3 7BN, England.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Pentafunctional AROM polypeptideA, B393Aspergillus nidulansMutation(s): 0 
Gene Names: aromAaroM
EC: 4.2.3.4 (PDB Primary Data), 2.5.1.19 (UniProt), 2.7.1.71 (UniProt), 4.2.1.10 (UniProt), 1.1.1.25 (UniProt)
UniProt
Find proteins for P07547 (Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139))
Explore P07547 
Go to UniProtKB:  P07547
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAD
Query on NAD

Download Ideal Coordinates CCD File 
D [auth A], F [auth B]NICOTINAMIDE-ADENINE-DINUCLEOTIDE
C21 H27 N7 O14 P2
BAWFJGJZGIEFAR-NNYOXOHSSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A], E [auth B]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.250 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.02α = 90
b = 104.51β = 90
c = 177.44γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-08-31
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2011-11-16
    Changes: Atomic model