Crystal structure of a metabolic reductase with 1-hydroxy-6-(4-hydroxybenzyl)-4-methylpyridin-2(1H)-one

Experimental Data Snapshot

  • Resolution: 3.31 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.210 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


Crystallographic Investigation and Selective Inhibition of Mutant Isocitrate Dehydrogenase.

Zheng, B.Yao, Y.Liu, Z.Deng, L.Anglin, J.L.Jiang, H.Prasad, B.V.Song, Y.

(2013) ACS Med Chem Lett 4: 542-546

  • DOI: https://doi.org/10.1021/ml400036z
  • Primary Citation of Related Structures:  
    4I3K, 4I3L

  • PubMed Abstract: 

    Mutations in isocitrate dehydrogenase (IDH), a key enzyme in the tricarboxylic acid cycle, have recently been found in ~75% glioma and ~20% acute myeloid leukemia. Different from the wild-type enzyme, mutant IDH1 catalyzes the reduction of α-ketoglutaric acid to D -2-hydroxyglutaric acid. Strong evidence has shown mutant IDH1 represents a novel target for this type of cancer. We found two 1-hydroxypyridin-2-one compounds that are potent inhibitors of R132H and R132C IDH1 mutants with K i values as low as 120 nM. These compounds exhibit >60-fold selectivity against wild-type IDH1 and can inhibit the production of D -2-hydroxyglutaric acid in IDH1 mutated cells, representing novel chemical probes for cancer biology studies. We also report the first inhibitor-bound crystal structures of IDH1(R132H), showing these inhibitors have H-bond, electrostatic and hydrophobic interactions with the mutant enzyme. Comparison with the substrate-bound IDH1 structures revealed the structural basis for the high enzyme selectivity of these compounds.

  • Organizational Affiliation

    Department of Pharmacology, Baylor College of Medicine, 1 Baylor Plaza, Houston, Texas 77030, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Isocitrate dehydrogenase [NADP] cytoplasmic
A, B
414Homo sapiensMutation(s): 1 
Gene Names: IDH1PICD
UniProt & NIH Common Fund Data Resources
Find proteins for O75874 (Homo sapiens)
Explore O75874 
Go to UniProtKB:  O75874
PHAROS:  O75874
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75874
Sequence Annotations
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
1BX BindingDB:  4I3K Ki: min: 280, max: 3.00e+4 (nM) from 4 assay(s)
IC50: 9700 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 3.31 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.210 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.855α = 90
b = 82.855β = 90
c = 304.039γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
StructureStudiodata collection

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-22
    Type: Initial release
  • Version 1.1: 2013-07-10
    Changes: Database references
  • Version 1.2: 2019-07-17
    Changes: Data collection, Refinement description