Crystal structure of Aspartate Semialdehyde Dehydrogenase with NADP from Blastomyces dermatitidis

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 

Starting Model: experimental
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This is version 2.1 of the entry. See complete history


Structural insights into inhibitor binding to a fungal ortholog of aspartate semialdehyde dehydrogenase.

Dahal, G.P.Viola, R.E.

(2018) Biochem Biophys Res Commun 503: 2848-2854

  • DOI: https://doi.org/10.1016/j.bbrc.2018.08.053
  • Primary Citation of Related Structures:  
    6C85, 6C8W

  • PubMed Abstract: 

    The aspartate pathway, uniquely found in plants and microorganisms, offers novel potential targets for the development of new antimicrobial drugs. Aspartate semialdehyde dehydrogenase (ASADH) catalyzes production of a key intermediate at the first branch point in this pathway. Several fungal ASADH structures have been determined, but the prior crystallization conditions had precluded complex formation with enzyme inhibitors. The first inhibitor-bound and cofactor-bound structures of ASADH from the pathogenic fungi Blastomyces dermatitidis have now been determined, along with a structural and functional comparison to other ASADH family members. The structure of this new ASADH is similar to the other fungal orthologs, but with some critical differences in the orientation of some active site functional groups and in the subunit interface region. The presence of this bound inhibitor reveals the first details about inhibitor binding interactions, and the flexible orientation of its aromatic ring provides helpful insights into the design of potentially more potent and selective antifungal compounds.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of Toledo, Toledo, OH, 43606, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Aspartate-semialdehyde dehydrogenase
A, B
375Blastomyces gilchristii SLH14081Mutation(s): 1 
Gene Names: BDCG_01946
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAP

Download Ideal Coordinates CCD File 
C [auth A],
D [auth B]
C21 H28 N7 O17 P3
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.197 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.46α = 90
b = 107.46β = 90
c = 223.07γ = 120
Software Package:
Software NamePurpose
Aimlessdata scaling
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

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Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI0777

Revision History  (Full details and data files)

  • Version 1.0: 2019-01-30
    Type: Initial release
  • Version 1.1: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.2: 2019-09-25
    Changes: Data collection, Database references
  • Version 2.0: 2022-03-16
    Changes: Atomic model, Author supporting evidence, Database references
  • Version 2.1: 2023-10-04
    Changes: Data collection, Refinement description