1AOR

STRUCTURE OF A HYPERTHERMOPHILIC TUNGSTOPTERIN ENZYME, ALDEHYDE FERREDOXIN OXIDOREDUCTASE

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.155 
  • R-Value Observed: 0.155 

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This is version 1.2 of the entry. See complete history. 


Literature

Structure of a hyperthermophilic tungstopterin enzyme, aldehyde ferredoxin oxidoreductase.

Chan, M.K., Mukund, S., Kletzin, A., Adams, M.W., Rees, D.C.

(1995) Science 267: 1463-1469

  • DOI: 10.1126/science.7878465
  • Primary Citation of Related Structures:  
    1AOR

  • PubMed Abstract: 

    • The crystal structure of the tungsten-containing aldehyde ferredoxin oxidoreductase (AOR) from Pyrococcus furiosus, a hyperthermophilic archaeon (formerly archaebacterium) that grows optimally at 100 degrees C, has been determined at 2.3 angstrom res ...

    The crystal structure of the tungsten-containing aldehyde ferredoxin oxidoreductase (AOR) from Pyrococcus furiosus, a hyperthermophilic archaeon (formerly archaebacterium) that grows optimally at 100 degrees C, has been determined at 2.3 angstrom resolution by means of multiple isomorphous replacement and multiple crystal form averaging. AOR consists of two identical subunits, each containing an Fe4S4 cluster and a molybdopterin-based tungsten cofactor that is analogous to the molybdenum cofactor found in a large class of oxotransferases. Whereas the general features of the tungsten coordination in this cofactor were consistent with a previously proposed structure, each AOR subunit unexpectedly contained two molybdopterin molecules that coordinate a tungsten by a total of four sulfur ligands, and the pterin system was modified by an intramolecular cyclization that generated a three-ringed structure. In comparison to other proteins, the hyperthermophilic enzyme AOR has a relatively small solvent-exposed surface area, and a relatively large number of both ion pairs and buried atoms. These properties may contribute to the extreme thermostability of this enzyme.

    Related Citations: 
    • Molecular Characterization of the Genes Encoding Two Tungsten-Containing Enzymes from Hyperthermophilic Archaea: Aldehyde Ferredoxin Oxidoreductase from Pyrococcus Furiosus and Formaldehyde Ferredoxin Oxidoreductase from Thermococcus Litoralis
      Kletzin, A., Mukund, S., Kelley-Crouse, T.L., Chan, M.K., Rees, D.C., Adams, M.W.W.
      () To be published --: --
    Organizational Affiliation: 

    Division of Chemistry and Chemical Engineering, Pasadena, CA 91125.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ALDEHYDE FERREDOXIN OXIDOREDUCTASEA, B605Pyrococcus furiosusMutation(s): 0 
EC: 1.2.7.5
Find proteins for Q51739 (Pyrococcus furiosus (strain ATCC 43587 / DSM 3638 / JCM 8422 / Vc1))
Explore Q51739 
Go to UniProtKB:  Q51739
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PTE
Query on PTE
Download CCD File 
A, B
TUNGSTOPTERIN COFACTOR
C20 H29 Mg N10 O14 P2 S4 W
PZGYSZZGRVZGLK-VFRDCKAPDP		 Ligand Interaction
SF4
Query on SF4
Download CCD File 
A, B
IRON/SULFUR CLUSTER
Fe4 S4
LJBDFODJNLIPKO-VKOJMFJBAC		 Ligand Interaction
FE
Query on FE
Download CCD File 
A
FE (III) ION
Fe
VTLYFUHAOXGGBS-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
Download CCD File 
A, B
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.155 
  • R-Value Observed: 0.155 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.939α = 90
b = 108.332β = 90
c = 159.792γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-04-20
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance