Structure of Zm ALDH7 in complex with NAD

Experimental Data Snapshot

  • Resolution: 2.94 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 

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Role and structural characterization of plant aldehyde dehydrogenases from family 2 and family 7.

Koncitikova, R.Vigouroux, A.Kopecna, M.Andree, T.Bartos, J.Sebela, M.Morera, S.Kopecny, D.

(2015) Biochem J 468: 109-123

  • DOI: https://doi.org/10.1042/BJ20150009
  • Primary Citation of Related Structures:  
    4PXL, 4PXN, 4PZ2

  • PubMed Abstract: 

    Aldehyde dehydrogenases (ALDHs) are responsible for oxidation of biogenic aldehyde intermediates as well as for cell detoxification of aldehydes generated during lipid peroxidation. So far, 13 ALDH families have been described in plants. In the present study, we provide a detailed biochemical characterization of plant ALDH2 and ALDH7 families by analysing maize and pea ALDH7 (ZmALDH7 and PsALDH7) and four maize cytosolic ALDH(cALDH)2 isoforms RF2C, RF2D, RF2E and RF2F [the first maize ALDH2 was discovered as a fertility restorer (RF2A)]. We report the crystal structures of ZmALDH7, RF2C and RF2F at high resolution. The ZmALDH7 structure shows that the three conserved residues Glu(120), Arg(300) and Thr(302) in the ALDH7 family are located in the substrate-binding site and are specific to this family. Our kinetic analysis demonstrates that α-aminoadipic semialdehyde, a lysine catabolism intermediate, is the preferred substrate for plant ALDH7. In contrast, aromatic aldehydes including benzaldehyde, anisaldehyde, cinnamaldehyde, coniferaldehyde and sinapaldehyde are the best substrates for cALDH2. In line with these results, the crystal structures of RF2C and RF2F reveal that their substrate-binding sites are similar and are formed by an aromatic cluster mainly composed of phenylalanine residues and several nonpolar residues. Gene expression studies indicate that the RF2C gene, which is strongly expressed in all organs, appears essential, suggesting that the crucial role of the enzyme would certainly be linked to the cell wall formation using aldehydes from phenylpropanoid pathway as substrates. Finally, plant ALDH7 may significantly contribute to osmoprotection because it oxidizes several aminoaldehydes leading to products known as osmolytes.

  • Organizational Affiliation

    †Department of Biochemistry, Faculty of Science, Palacký University, Šlechtitelů 11, Olomouc CZ-783 71, Czech Republic.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Uncharacterized protein
A, B
525Zea maysMutation(s): 0 
Find proteins for C0PHD8 (Zea mays)
Explore C0PHD8 
Go to UniProtKB:  C0PHD8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupC0PHD8
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAD

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C21 H27 N7 O14 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.94 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.190 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.22α = 90
b = 162.49β = 90
c = 188.62γ = 90
Software Package:
Software NamePurpose
DNAdata collection
XDSdata reduction
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: 2015-03-18
    Type: Initial release
  • Version 1.1: 2015-05-20
    Changes: Database references
  • Version 1.2: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description