Biological Assembly 1  

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

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 72.11 kDa 
• Atom Count: 5394 
• Modelled Residue Count: 652 
• Deposited Residue Count: 654 
• Unique protein chains: 1

1QOR

CRYSTAL STRUCTURE OF ESCHERICHIA COLI QUINONE OXIDOREDUCTASE COMPLEXED WITH NADPH

• PDB DOI: 10.2210/pdb1QOR/pdb

• Classification: OXIDOREDUCTASE
• Organism(s): Escherichia coli
• Mutation(s): No 


• Deposited: 1995-02-14 Released: 1995-06-03 
• Deposition Author(s): Thorn, J.M., Barton, J.D., Dixon, N.E., Ollis, D.L., Edwards, K.J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.140 
• R-Value Observed: 0.140 

Literature

Crystal structure of Escherichia coli QOR quinone oxidoreductase complexed with NADPH.

Thorn, J.M., Barton, J.D., Dixon, N.E., Ollis, D.L., Edwards, K.J.

(1995) J Mol Biol 249: 785-799

• PubMed: 7602590 
• DOI: 10.1006/jmbi.1995.0337
• Primary Citation of Related Structures:  
  1QOR


• PubMed Abstract: 
  

The crystal structure of the homodimer of quinone oxidoreductase from Escherichia coli has been determined using the multiple isomorphous replacement method at 2.2 A resolution and refined to an R-factor of 14.1% The crystallographic asymmetric unit contains one functional dimer with the two subunits being related by a non-crystallographic 2-fold symmetry axis. The model consists of two polypeptide chains (residues 2 through 327), one NADPH molecule and one sulphate anion per subunit, and 432 water molecules. Each subunit consists of two domains: a catalytic domain and a nucleotide-binding domain with the NADPH co-factor bound in the cleft between domains. Quinone oxidoreductase has an unusual nucleotide-binding fingerprint motif consisting of the sequence AXXGXXG. The overall structure of quinone oxidoreductase shows strong structural homology to that of horse liver alcohol dehydrogenase.

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Related Citations: 

• Crystallization and Preliminary X-Ray Diffraction Studies on a Soluble Escherichia Coli Quinone Oxidoreductase
  Edwards, K.J., Thorn, J.M., Daniher, J.A., Dixon, N.E., Ollis, D.L.
  (1994) J Mol Biol 240: 501

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Organizational Affiliation: 

Centre for Molecular Structure and Function, Research School of Chemistry, Australian National University, Canberra.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
QUINONE OXIDOREDUCTASE	A, B	327	Escherichia coli	Mutation(s): 0  EC: 1.6.5.5
UniProt
Find proteins for P28304 (Escherichia coli (strain K12)) Explore P28304  Go to UniProtKB:  P28304

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NDP	D [auth A], F [auth B]	NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE C21 H30 N7 O17 P3 ACFIXJIJDZMPPO-NNYOXOHSSA-N
SO4	C [auth A], E [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Work: 0.140 
• R-Value Observed: 0.140 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 107.44	α = 90
b = 104.06	β = 90
c = 77.45	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-02-14 
• Released Date: 1995-06-03 
Deposition Author(s): Thorn, J.M., Barton, J.D., Dixon, N.E., Ollis, D.L., Edwards, K.J.

Revision History  

• Version 1.0: 1995-06-03
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2013-12-04
  Changes: Non-polymer description
• Version 1.4: 2017-11-29
  Changes: Derived calculations, Other