6CJF

Human dihydroorotate dehydrogenase bound to 4-quinoline carboxylic acid inhibitor 43


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

Design, Synthesis, and Biological Evaluation of 4-Quinoline Carboxylic Acids as Inhibitors of Dihydroorotate Dehydrogenase.

Madak, J.T.Cuthbertson, C.R.Miyata, Y.Tamura, S.Petrunak, E.M.Stuckey, J.A.Han, Y.He, M.Sun, D.Showalter, H.D.Neamati, N.

(2018) J Med Chem 61: 5162-5186

  • DOI: https://doi.org/10.1021/acs.jmedchem.7b01862
  • Primary Citation of Related Structures:  
    6CJF, 6CJG

  • PubMed Abstract: 

    We pursued a structure-guided approach toward the development of improved dihydroorotate dehydrogenase (DHODH) inhibitors with the goal of forming new interactions between DHODH and the brequinar class of inhibitors. Two potential residues, T63 and Y356, suitable for novel H-bonding interactions, were identified in the brequinar-binding pocket. Analogues were designed to maintain the essential pharmacophore and form new electrostatic interactions through strategically positioned H-bond accepting groups. This effort led to the discovery of potent quinoline-based analogues 41 (DHODH IC 50 = 9.71 ± 1.4 nM) and 43 (DHODH IC 50 = 26.2 ± 1.8 nM). A cocrystal structure between 43 and DHODH depicts a novel water mediated H-bond interaction with T63. Additional optimization led to the 1,7-naphthyridine 46 (DHODH IC 50 = 28.3 ± 3.3 nM) that forms a novel H-bond with Y356. Importantly, compound 41 possesses significant oral bioavailability ( F = 56%) and an elimination t 1/2 = 2.78 h (PO dosing). In conclusion, the data supports further preclinical studies of our lead compounds toward selection of a candidate for early-stage clinical development.


  • Organizational Affiliation

    Life Sciences Institute and Department of Biological Chemistry , University of Michigan , Ann Arbor , Michigan 48109 , United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Dihydroorotate dehydrogenase (quinone), mitochondrial
A, B
374Homo sapiensMutation(s): 0 
Gene Names: DHODH
EC: 1.3.5.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q02127 (Homo sapiens)
Explore Q02127 
Go to UniProtKB:  Q02127
PHAROS:  Q02127
GTEx:  ENSG00000102967 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ02127
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
FMN
Query on FMN

Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]
FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
F54
Query on F54

Download Ideal Coordinates CCD File 
E [auth A],
I [auth B]
2-[4-(2-chloro-6-methylpyridin-3-yl)phenyl]-6-fluoro-3-methylquinoline-4-carboxylic acid
C23 H16 Cl F N2 O2
NPMKPVGSRBWMIO-UHFFFAOYSA-N
ZWI
Query on ZWI

Download Ideal Coordinates CCD File 
F [auth A],
J [auth B],
K [auth B]
3-[decyl(dimethyl)ammonio]propane-1-sulfonate
C15 H33 N O3 S
WKALLSVICJPZTM-UHFFFAOYSA-N
ORO
Query on ORO

Download Ideal Coordinates CCD File 
D [auth A],
H [auth B]
OROTIC ACID
C5 H4 N2 O4
PXQPEWDEAKTCGB-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.63 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.163 
  • R-Value Observed: 0.165 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.752α = 89.15
b = 51.527β = 81.61
c = 65.088γ = 76.44
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-23
    Type: Initial release
  • Version 1.1: 2018-07-11
    Changes: Data collection, Database references
  • Version 1.2: 2023-10-04
    Changes: Data collection, Database references, Refinement description