Structure ALDH7A1 inactivated by 4-diethylaminobenzaldehyde

Experimental Data Snapshot

  • Resolution: 1.95 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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Diethylaminobenzaldehyde Is a Covalent, Irreversible Inactivator of ALDH7A1.

Luo, M.Gates, K.S.Henzl, M.T.Tanner, J.J.

(2015) ACS Chem Biol 10: 693-697

  • DOI: https://doi.org/10.1021/cb500977q
  • Primary Citation of Related Structures:  
    4X0T, 4X0U

  • PubMed Abstract: 

    There is growing interest in aldehyde dehydrogenases (ALDHs) because of their overexpression in cancer stem cells and the ability to mediate resistance to cancer drugs. Here, we report the first crystal structure of an aldehyde dehydrogenase complexed with the inhibitor 4-diethylaminobenzaldehyde (DEAB). Contrary to the widely held belief that DEAB is a reversible inhibitor of ALDHs, we show that DEAB irreversibly inactivates ALDH7A1 via formation of a stable, covalent acyl-enzyme species.

  • Organizational Affiliation

    ‡Department of Biochemistry, University of Missouri-Columbia, Columbia, Missouri 65211, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-aminoadipic semialdehyde dehydrogenase
A, B, C, D
513Homo sapiensMutation(s): 0 
Gene Names: ALDH7A1ATQ1
EC: (PDB Primary Data), (PDB Primary Data), (PDB Primary Data)
UniProt & NIH Common Fund Data Resources
Find proteins for P49419 (Homo sapiens)
Explore P49419 
Go to UniProtKB:  P49419
PHAROS:  P49419
GTEx:  ENSG00000164904 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP49419
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.95 Å
  • R-Value Free: 0.227 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: F 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 161.543α = 90
b = 219.407β = 90
c = 233.231γ = 90
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-14
    Type: Initial release
  • Version 1.1: 2015-04-01
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Derived calculations, Refinement description, Source and taxonomy
  • Version 1.3: 2023-09-27
    Changes: Data collection, Database references, Derived calculations, Refinement description