Crystal Structure of Aspartate Semialdehyde Dehydrogenase with NADP from Candida albicans

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 

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Expansion of the aspartate beta-semialdehyde dehydrogenase family: the first structure of a fungal ortholog.

Arachea, B.T.Liu, X.Pavlovsky, A.G.Viola, R.E.

(2010) Acta Crystallogr D Biol Crystallogr 66: 205-212

  • DOI: https://doi.org/10.1107/S0907444909052834
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The enzyme aspartate semialdehyde dehydrogenase (ASADH) catalyzes a critical transformation that produces the first branch-point intermediate in an essential microbial amino-acid biosynthetic pathway. The first structure of an ASADH isolated from a fungal species (Candida albicans) has been determined as a complex with its pyridine nucleotide cofactor. This enzyme is a functional dimer, with a similar overall fold and domain organization to the structurally characterized bacterial ASADHs. However, there are differences in the secondary-structural elements and in cofactor binding that are likely to cause the lower catalytic efficiency of this fungal enzyme. Alterations in the dimer interface, through deletion of a helical subdomain and replacement of amino acids that participate in a hydrogen-bonding network, interrupt the intersubunit-communication channels required to support an alternating-site catalytic mechanism. The detailed functional information derived from this new structure will allow an assessment of ASADH as a possible target for antifungal drug development.

  • Organizational Affiliation

    Department of Chemistry, University of Toledo, Toledo, Ohio 43606, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aspartate-semialdehyde dehydrogenase
A, B
381Candida albicansMutation(s): 0 
Gene Names: CaO19.1559CaO19.9132HOM2
Find proteins for Q5ALM0 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Explore Q5ALM0 
Go to UniProtKB:  Q5ALM0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5ALM0
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAP

Download Ideal Coordinates CCD File 
C21 H28 N7 O17 P3
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.227 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.412α = 90
b = 152.18β = 90
c = 97.762γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data 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: 2010-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-03-27
    Changes: Database references
  • Version 1.3: 2017-11-01
    Changes: Advisory, Refinement description
  • Version 1.4: 2023-09-06
    Changes: Advisory, Data collection, Database references, Derived calculations, Refinement description