5FHZ

Human aldehyde dehydrogenase 1A3 complexed with NAD(+) and retinoic acid


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 

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Literature

Crystal structure of human aldehyde dehydrogenase 1A3 complexed with NAD(+) and retinoic acid.

Moretti, A.Li, J.Donini, S.Sobol, R.W.Rizzi, M.Garavaglia, S.

(2016) Sci Rep 6: 35710-35710

  • DOI: 10.1038/srep35710
  • Primary Citation of Related Structures:  
    5FHZ

  • PubMed Abstract: 
  • The aldehyde dehydrogenase family 1 member A3 (ALDH1A3) catalyzes the oxidation of retinal to the pleiotropic factor retinoic acid using NAD + . The level of ALDHs enzymatic activity has been used as a cancer stem cell marker and seems to correlate with tumour aggressiveness ...

    The aldehyde dehydrogenase family 1 member A3 (ALDH1A3) catalyzes the oxidation of retinal to the pleiotropic factor retinoic acid using NAD + . The level of ALDHs enzymatic activity has been used as a cancer stem cell marker and seems to correlate with tumour aggressiveness. Elevated ALDH1A3 expression in mesenchymal glioma stem cells highlights the potential of this isozyme as a prognosis marker and drug target. Here we report the first crystal structure of human ALDH1A3 complexed with NAD + and the product all-trans retinoic acid (REA). The tetrameric ALDH1A3 folds into a three domain-based architecture highly conserved along the ALDHs family. The structural analysis revealed two different and coupled conformations for NAD + and REA that we propose to represent two snapshots along the catalytic cycle. Indeed, the isoprenic moiety of REA points either toward the active site cysteine, or moves away adopting the product release conformation. Although ALDH1A3 shares high sequence identity with other members of the ALDH1A family, our structural analysis revealed few peculiar residues in the 1A3 isozyme active site. Our data provide information into the ALDH1As catalytic process and can be used for the structure-based design of selective inhibitors of potential medical interest.


    Organizational Affiliation

    Department of Pharmaceutical Sciences, University of Piemonte Orientale, Largo Donegani 2, 28100 Novara, Italy.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Aldehyde dehydrogenase family 1 member A3
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H
529Homo sapiensMutation(s): 0 
Gene Names: ALDH1A3ALDH6
EC: 1.2.1.5 (PDB Primary Data), 1.2.1.36 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P47895 (Homo sapiens)
Explore P47895 
Go to UniProtKB:  P47895
PHAROS:  P47895
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP47895
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.231 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.656α = 90
b = 159.785β = 93.69
c = 177.647γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
SCALAdata scaling
XDSdata 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: 2016-11-02
    Type: Initial release