5X5U

Crystal structure of alpha-ketoglutarate-semialdehyde dehydrogenase (KGSADH) complexed with NAD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 

Starting Model: experimental
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This is version 1.2 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: https://doi.org/10.1038/srep46005
  • Primary Citation of Related Structures:  
    5X5T, 5X5U

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-ketoglutaric semialdehyde dehydrogenase
A, B
505Azospirillum brasilenseMutation(s): 0 
Gene Names: araE
EC: 1.2.1.26 (PDB Primary Data), 1.2.1.24 (PDB Primary Data)
UniProt
Find proteins for Q1JUP4 (Azospirillum brasilense)
Explore Q1JUP4 
Go to UniProtKB:  Q1JUP4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ1JUP4
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.162 
  • R-Value Observed: 0.165 
  • Space Group: P 43 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 129.305α = 90
b = 129.305β = 90
c = 118.36γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
HKL-2000phasing
HKLdata reduction

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-05-10
    Type: Initial release
  • Version 1.1: 2020-05-13
    Changes: Structure summary
  • Version 1.2: 2023-11-22
    Changes: Data collection, Database references, Refinement description