Kynurenine Aminotransferase II Inhibitors

Experimental Data Snapshot

  • Resolution: 2.15 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


PF-04859989 as a template for structure-based drug design: identification of new pyrazole series of irreversible KAT II inhibitors with improved lipophilic efficiency.

Dounay, A.B.Anderson, M.Bechle, B.M.Evrard, E.Gan, X.Kim, J.Y.McAllister, L.A.Pandit, J.Rong, S.Salafia, M.A.Tuttle, J.B.Zawadzke, L.E.Verhoest, P.R.

(2013) Bioorg Med Chem Lett 23: 1961-1966

  • DOI: https://doi.org/10.1016/j.bmcl.2013.02.039
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The structure-based design, synthesis, and biological evaluation of a new pyrazole series of irreversible KAT II inhibitors are described herein. The modification of the inhibitor scaffold of 1 and 2 from a dihydroquinolinone core to a tetrahydropyrazolopyridinone core led to discovery of a new series of potent KAT II inhibitors with excellent physicochemical properties. Compound 20 is the most potent and lipophilically efficient of these new pyrazole analogs, with a k(inact)/K(i) value of 112,000 M(-1)s(-1) and lipophilic efficiency (LipE) of 8.53. The X-ray crystal structure of 20 with KAT II demonstrates key features that contribute to this remarkable potency and binding efficiency.

  • Organizational Affiliation

    Pfizer Worldwide Research and Development, Neuroscience Medicinal Chemistry, Groton Laboratories, Eastern Point Road, Groton, CT 06340, USA. amy.dounay@coloradocollege.edu

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Kynurenine/alpha-aminoadipate aminotransferase, mitochondrial
A, B
439Homo sapiensMutation(s): 2 
EC: (PDB Primary Data), (PDB Primary Data), (UniProt), (UniProt), (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N5Z0 (Homo sapiens)
Explore Q8N5Z0 
Go to UniProtKB:  Q8N5Z0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8N5Z0
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.15 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.166 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 85.616α = 90
b = 114.682β = 90
c = 116.523γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PDB_EXTRACTdata extraction
JDirectordata collection
XDSdata reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

  • Released Date: 2013-03-20 
  • Deposition Author(s): Pandit, J.

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-20
    Type: Initial release
  • Version 1.1: 2013-05-22
    Changes: Database references
  • Version 1.2: 2023-09-13
    Changes: Data collection, Database references, Derived calculations, Refinement description