2CD9

Sulfolobus solfataricus Glucose Dehydrogenase 1 - apo form


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The Structural Basis of Substrate Promiscuity in Glucose Dehydrogenase from the Hyperthermophilic Archaeon Sulfolobus Solfataricus.

Milburn, C.C.Lamble, H.J.Theodossis, A.Bull, S.D.Hough, D.W.Danson, M.J.Taylor, G.L.

(2006) J.Biol.Chem. 281: 14796

  • DOI: 10.1074/jbc.M601334200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The hyperthermophilic archaeon Sulfolobus solfataricus grows optimally above 80 degrees C and utilizes an unusual, promiscuous, non-phosphorylative Entner-Doudoroff pathway to metabolize both glucose and galactose. The first enzyme in this pathway, g ...

    The hyperthermophilic archaeon Sulfolobus solfataricus grows optimally above 80 degrees C and utilizes an unusual, promiscuous, non-phosphorylative Entner-Doudoroff pathway to metabolize both glucose and galactose. The first enzyme in this pathway, glucose dehydrogenase, catalyzes the oxidation of glucose to gluconate, but has been shown to have activity with a broad range of sugar substrates, including glucose, galactose, xylose, and L-arabinose, with a requirement for the glucose stereo configuration at the C2 and C3 positions. Here we report the crystal structure of the apo form of glucose dehydrogenase to a resolution of 1.8 A and a complex with its required cofactor, NADP+, to a resolution of 2.3 A. A T41A mutation was engineered to enable the trapping of substrate in the crystal. Complexes of the enzyme with D-glucose and D-xylose are presented to resolutions of 1.6 and 1.5 A, respectively, that provide evidence of selectivity for the beta-anomeric, pyranose form of the substrate, and indicate that this is the productive substrate form. The nature of the promiscuity of glucose dehydrogenase is also elucidated, and a physiological role for this enzyme in xylose metabolism is suggested. Finally, the structure suggests that the mechanism of sugar oxidation by this enzyme may be similar to that described for human sorbitol dehydrogenase.


    Organizational Affiliation

    Centre for Biomolecular Sciences, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, Scotland, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GLUCOSE DEHYDROGENASE
A, B
366Saccharolobus solfataricusMutation(s): 0 
Gene Names: gdh
EC: 1.1.1.47
Find proteins for O93715 (Saccharolobus solfataricus)
Go to UniProtKB:  O93715
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 68.501α = 90.00
b = 90.310β = 90.00
c = 138.941γ = 90.00
Software Package:
Software NamePurpose
SCALAdata scaling
MOSFLMdata reduction
REFMACrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-03-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance