4I3L

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.292 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.220 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

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: 10.1021/ml400036z
  • Primary Citation of Related Structures:  4I3K

  • 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-ketoglut ...

    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 Ki 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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Isocitrate dehydrogenase [NADP] cytoplasmic
A, B
414Homo sapiensGene Names: IDH1 (PICD)
EC: 1.1.1.42
Find proteins for O75874 (Homo sapiens)
Go to Gene View: IDH1
Go to UniProtKB:  O75874
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
1BZ
Query on 1BZ

Download SDF File 
Download CCD File 
A
6-benzyl-1-hydroxy-4-methylpyridin-2(1H)-one
C13 H13 N O2
AVLZAVSZOAQKRC-UHFFFAOYSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1BZIC50: >30000 nM (99) BINDINGDB
1BZKi: 190 - >50000 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.292 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.220 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 80.853α = 90.00
b = 80.853β = 90.00
c = 304.836γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASESphasing
HKL-2000data reduction
StructureStudiodata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-22
    Type: Initial release
  • Version 1.1: 2013-07-10
    Type: Database references