5A06

Crystal structure of aldose-aldose oxidoreductase from Caulobacter crescentus complexed with sorbitol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.841 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.159 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure and Function of Caulobacter Crescentus Aldose-Aldose Oxidoreductase.

Taberman, H.Andberg, M.Koivula, A.Hakulinen, N.Penttila, M.Rouvinen, J.Parkkinen, T.

(2015) Biochem.J. 472: 297

  • DOI: 10.1042/BJ20150681
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Aldose-aldose oxidoreductase (Cc AAOR) is a recently characterized enzyme from the bacterial strain Caulobacter crescentus CB15 belonging to the glucose-fructose oxidoreductase/inositol dehydrogenase/rhizopine catabolism protein (Gfo/Idh/MocA) family ...

    Aldose-aldose oxidoreductase (Cc AAOR) is a recently characterized enzyme from the bacterial strain Caulobacter crescentus CB15 belonging to the glucose-fructose oxidoreductase/inositol dehydrogenase/rhizopine catabolism protein (Gfo/Idh/MocA) family. Cc AAOR catalyses the oxidation and reduction of a panel of aldose monosaccharides using a tightly bound NADP(H) cofactor that is regenerated in the catalytic cycle. Furthermore, Cc AAOR can also oxidize 1,4-linked oligosaccharides. In the present study, we present novel crystal structures of the dimeric Cc AAOR in complex with the cofactor and glycerol, D-xylose, D-glucose, maltotriose and D-sorbitol determined to resolutions of 2.0, 1.8, 1.7, 1.9 and 1.8 Å (1 Å=0.1 nm), respectively. These complex structures allowed for a detailed analysis of the ligand-binding interactions. The structures showed that the C1 carbon of a substrate, which is either reduced or oxidized, is close to the reactive C4 carbon of the nicotinamide ring of NADP(H). In addition, the O1 hydroxy group of the substrate, which is either protonated or deprotonated, is unexpectedly close to both Lys(104) and Tyr(189), which may both act as a proton donor or acceptor. This led us to hypothesize that this intriguing feature could be beneficial for Cc AAOR to catalyse the reduction of a linear form of a monosaccharide substrate and the oxidation of a pyranose form of the same substrate in a reaction cycle, during which the bound cofactor is regenerated.


    Organizational Affiliation

    VTT Technical Research Centre of Finland Ltd, PO Box 1000, FI-02044 VTT, Finland.,Department of Chemistry, University of Eastern Finland, PO Box 111, FI-80101 Joensuu, Finland.,Department of Chemistry, University of Eastern Finland, PO Box 111, FI-80101 Joensuu, Finland tarja.parkkinen@uef.fi.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ALDOSE-ALDOSE OXIDOREDUCTASE
A, B, C, D, E, F
339Caulobacter vibrioides (strain ATCC 19089 / CB15)Mutation(s): 0 
Find proteins for Q9A8X3 (Caulobacter vibrioides (strain ATCC 19089 / CB15))
Go to UniProtKB:  Q9A8X3
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
SOR
Query on SOR

Download SDF File 
Download CCD File 
A, B, C, D, E, F
D-SORBITOL
C6 H14 O6
FBPFZTCFMRRESA-JGWLITMVSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B, C, D, E, F
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.841 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.159 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 101.189α = 90.00
b = 154.088β = 110.02
c = 107.776γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
PHASERphasing
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-10-21
    Type: Initial release
  • Version 1.1: 2015-12-09
    Type: Database references