3N2T

Structure of the glycerol dehydrogenase AKR11B4 from Gluconobacter oxydans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The Three-Dimensional Structure of AKR11B4, a Glycerol Dehydrogenase from Gluconobacter oxydans, Reveals a Tryptophan Residue as an Accelerator of Reaction Turnover.

Richter, N.Breicha, K.Hummel, W.Niefind, K.

(2010) J Mol Biol 404: 353-362

  • DOI: 10.1016/j.jmb.2010.09.049
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The NADP-dependent glycerol dehydrogenase (EC 1.1.1.72) from Gluconobacter oxydans is a member of family 11 of the aldo-keto reductase (AKR) enzyme superfamily; according to the systematic nomenclature within the AKR superfamily, the term AKR11B4 has ...

    The NADP-dependent glycerol dehydrogenase (EC 1.1.1.72) from Gluconobacter oxydans is a member of family 11 of the aldo-keto reductase (AKR) enzyme superfamily; according to the systematic nomenclature within the AKR superfamily, the term AKR11B4 has been assigned to the enzyme. AKR11B4 is a biotechnologically attractive enzyme because of its broad substrate spectrum, combined with its distinctive regioselectivity and stereoselectivity. These features can be partially rationalized based on a 2-Å crystal structure of apo-AKR11B4, which we describe and interpret here against the functional complex structures of other members of family 11 of the AKR superfamily. The structure of AKR11B4 shows the AKR-typical (β/α)(8) TIM-barrel fold, with three loops and the C-terminal tail determining the particular enzymatic properties. In comparison to AKR11B1 (its closest AKR relative), AKR11B4 has a relatively broad binding cleft for the cosubstrate NADP/NADPH. In the crystalline environment, it is completely blocked by the C-terminal segment of a neighboring protomer. The structure reveals a conspicuous tryptophan residue (Trp23) that has to adopt an unconventional and strained side-chain conformation to permit cosubstrate binding. We predict and confirm by site-directed mutagenesis that Trp23 is an accelerator of (co)substrate turnover. Furthermore, we show that, simultaneously, this tryptophan residue is a critical determinant for substrate binding by the enzyme, while enantioselectivity is probably governed by a methionine residue within the C-terminal tail. We present structural reasons for these notions based on ternary complex models of AKR11B4, NADP, and either octanal, d-glyceraldehyde, or l-glyceraldehyde.


    Related Citations: 
    • Characterisation of a recombinant NADP-dependent glycerol dehydrogenase from Gluconobacter oxydans and its application in the production of L-glyceraldehyde.
      Richter, N., Neumann, M., Liese, A., Wohlgemuth, R., Eggert, T., Hummel, W.
      (2009) Chembiochem 10: 1888

    Organizational Affiliation

    Evocatal GmbH, Merowingerplatz 1A, D-40225 Düsseldorf, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Putative oxidoreductase
A
348Gluconobacter oxydansMutation(s): 0 
Gene Names: GOX1615
EC: 1.1.1
Find proteins for Q5FQJ0 (Gluconobacter oxydans (strain 621H))
Go to UniProtKB:  Q5FQJ0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.189 
  • R-Value Observed: 0.191 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.25α = 90
b = 62.39β = 90.47
c = 59.82γ = 90
Software Package:
Software NamePurpose
MOLREPphasing
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-07-21
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance