Crystal structure of human D-amino acid oxidase in complex with hydroxyquinolin-2(1H)

Experimental Data Snapshot

  • Resolution: 2.20 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.242 

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Discovery, SAR, and pharmacokinetics of a novel 3-Hydroxyquinolin-2(1H)-one series of potent D-amino acid oxidase (DAAO) inhibitors

Duplantier, A.J.Becker, S.L.Bohanon, M.J.Borzilleri, K.A.Chrunyk, B.A.Downs, J.T.Hu, L.Y.El-Kattan, A.James, L.C.Liu, S.Lu, J.Maklad, N.Mansour, M.N.Mente, S.Piotrowski, M.A.Sakya, S.M.Sheehan, S.Steyn, S.J.Strick, C.A.Williams, V.A.Zhang, L.

(2009) J Med Chem 52: 3576-3585

  • DOI: https://doi.org/10.1021/jm900128w
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    3-Hydroxyquinolin-2(1H)-one (2) was discovered by high throughput screening in a functional assay to be a potent inhibitor of human DAAO, and its binding affinity was confirmed in a Biacore assay. Cocrystallization of 2 with the human DAAO enzyme defined the binding site and guided the design of new analogues. The SAR, pharmacokinetics, brain exposure, and effects on cerebellum D-serine are described. Subsequent evaluation against the rat DAAO enzyme revealed a divergent SAR versus the human enzyme and may explain the high exposures of drug necessary to achieve significant changes in rat or mouse cerebellum D-serine.

  • Organizational Affiliation

    Pfizer Global Research and Development, Groton Laboratories, Groton, CT 06340, USA. allen.j.duplantier@pfizer.com

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
D-amino-acid oxidase
A, B, C, D
351Homo sapiensMutation(s): 0 
Gene Names: DAODAMOX
UniProt & NIH Common Fund Data Resources
Find proteins for P14920 (Homo sapiens)
Explore P14920 
Go to UniProtKB:  P14920
PHAROS:  P14920
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14920
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
G3E BindingDB:  3G3E Kd: min: 13, max: 150 (nM) from 2 assay(s)
IC50: min: 4, max: 100 (nM) from 5 assay(s)
Binding MOAD:  3G3E IC50: 4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 2.20 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.239 
  • R-Value Observed: 0.242 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.063α = 102.62
b = 82.584β = 105.43
c = 96.974γ = 110.79
Software Package:
Software NamePurpose

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description