Crystal structure of a metabolic reductase with (E)-1-benzyl-5-((1-methyl-5-oxo-2-thioxoimidazolidin-4-ylidene)methyl)pyridin-2(1H)-one

Experimental Data Snapshot

  • Resolution: 3.29 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.229 

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Ligand Structure Quality Assessment 

This is version 1.4 of the entry. See complete history


Inhibition of Cancer-Associated Mutant Isocitrate Dehydrogenases by 2-Thiohydantoin Compounds.

Wu, F.Jiang, H.Zheng, B.Kogiso, M.Yao, Y.Zhou, C.Li, X.N.Song, Y.

(2015) J Med Chem 58: 6899-6908

  • DOI: https://doi.org/10.1021/acs.jmedchem.5b00684
  • Primary Citation of Related Structures:  
    4XRX, 4XS3

  • PubMed Abstract: 

    Somatic mutations of isocitrate dehydrogenase 1 (IDH1) at R132 are frequently found in certain cancers such as glioma. With losing the activity of wild-type IDH1, the R132H and R132C mutant proteins can reduce α-ketoglutaric acid (α-KG) to d-2-hydroxyglutaric acid (D2HG). The resulting high concentration of D2HG inhibits many α-KG-dependent dioxygenases, including histone demethylases, to cause broad histone hypermethylation. These aberrant epigenetic changes are responsible for the initiation of these cancers. We report the synthesis, structure-activity relationships, enzyme kinetics, and binding thermodynamics of a novel series of 2-thiohydantoin and related compounds, among which several compounds are potent inhibitors of mutant IDH1 with Ki as low as 420 nM. X-ray crystal structures of IDH1(R132H) in complex with two inhibitors are reported, showing their inhibitor-protein interactions. These compounds can decrease the cellular concentration of D2HG, reduce the levels of histone methylation, and suppress the proliferation of stem-like cancer cells in BT142 glioma with IDH1 R132H mutation.

  • Organizational Affiliation

    Department of Pharmacology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA.

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
GTEx:  ENSG00000138413 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO75874
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAP

Download Ideal Coordinates CCD File 
D [auth A],
F [auth B]
C21 H28 N7 O17 P3
Query on 42W

Download Ideal Coordinates CCD File 
C [auth A],
E [auth B]
C17 H15 N3 O2 S
Binding Affinity Annotations 
IDSourceBinding Affinity
42W BindingDB:  4XS3 Ki: min: 4600, max: 3.29e+4 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Resolution: 3.29 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.229 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.586α = 90
b = 82.586β = 90
c = 306.599γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
StructureStudiodata collection
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report

Ligand Structure Quality Assessment 

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Cancer Prevention and Research Institute of Texas (CPRIT)United StatesRP140469
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesR01NS080963

Revision History  (Full details and data files)

  • Version 1.0: 2016-07-27
    Type: Initial release
  • Version 1.1: 2017-09-13
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.2: 2019-04-24
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2019-12-18
    Changes: Author supporting evidence
  • Version 1.4: 2024-02-28
    Changes: Data collection, Database references