5X5T

Crystal structure of alpha-ketoglutarate semialdehyde dehydrogenase (KGSADH) from Azospirillum brasilense


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structural insights into the production of 3-hydroxypropionic acid by aldehyde dehydrogenase from Azospirillum brasilense.

Son, H.F.Park, S.Yoo, T.H.Jung, G.Y.Kim, K.J.

(2017) Sci Rep 7: 46005-46005

  • DOI: 10.1038/srep46005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • 3-Hydroxypropionic acid (3-HP) is an important platform chemical to be converted to acrylic acid and acrylamide. Aldehyde dehydrogenase (ALDH), an enzyme that catalyzes the reaction of 3-hydroxypropionaldehyde (3-HPA) to 3-HP, determines 3-HP product ...

    3-Hydroxypropionic acid (3-HP) is an important platform chemical to be converted to acrylic acid and acrylamide. Aldehyde dehydrogenase (ALDH), an enzyme that catalyzes the reaction of 3-hydroxypropionaldehyde (3-HPA) to 3-HP, determines 3-HP production rate during the conversion of glycerol to 3-HP. To elucidate molecular mechanism of 3-HP production, we determined the first crystal structure of a 3-HP producing ALDH, α-ketoglutarate-semialdehyde dehydrogenase from Azospirillum basilensis (AbKGSADH), in its apo-form and in complex with NAD+. Although showing an overall structure similar to other ALDHs, the AbKGSADH enzyme had an optimal substrate binding site for accepting 3-HPA as a substrate. Molecular docking simulation of 3-HPA into the AbKGSADH structure revealed that the residues Asn159, Gln160 and Arg163 stabilize the aldehyde- and the hydroxyl-groups of 3-HPA through hydrogen bonds, and several hydrophobic residues, such as Phe156, Val286, Ile288, and Phe450, provide the optimal size and shape for 3-HPA binding. We also compared AbKGSADH with other reported 3-HP producing ALDHs for the crucial amino acid residues for enzyme catalysis and substrate binding, which provides structural implications on how these enzymes utilize 3-HPA as a substrate.


    Organizational Affiliation

    School of Life Sciences, KNU Creative BioResearch Group, Kyungpook National University, Daehak-ro 80, Buk-ku, Daegu 702-701, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-ketoglutaric semialdehyde dehydrogenase
A, B
505Azospirillum brasilenseMutation(s): 0 
Gene Names: araE
EC: 1.2.1.26
Find proteins for Q1JUP4 (Azospirillum brasilense)
Go to UniProtKB:  Q1JUP4
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.240 
  • R-Value Work: 0.174 
  • Space Group: P 43 2 2
Unit Cell:
Length (Å)Angle (°)
a = 129.040α = 90.00
b = 129.040β = 90.00
c = 118.093γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PDB_EXTRACTdata extraction
HKL-2000data scaling
HKL-2000data reduction
HKL-2000phasing
HKLdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2017-02-17 
  • Released Date: 2017-05-10 
  • Deposition Author(s): Son, H.-F., Kim, K.-J.

Revision History 

  • Version 1.0: 2017-05-10
    Type: Initial release