5ZF8

Structure of human dihydroorotate dehydrogenase in complex with 277-11-OAc


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Selective Cytotoxicity of Dihydroorotate Dehydrogenase Inhibitors to Human Cancer Cells Under Hypoxia and Nutrient-Deprived Conditions.

Miyazaki, Y.Inaoka, D.K.Shiba, T.Saimoto, H.Sakura, T.Amalia, E.Kido, Y.Sakai, C.Nakamura, M.Moore, A.L.Harada, S.Kita, K.

(2018) Front Pharmacol 9: 997-997

  • DOI: 10.3389/fphar.2018.00997
  • Primary Citation of Related Structures:  
    5ZF9, 5ZF4, 5ZF8, 5ZF7, 5ZFB, 5ZFA

  • PubMed Abstract: 
  • Human dihydroorotate dehydrogenase (HsDHODH) is a key enzyme of pyrimidine de novo biosynthesis pathway. It is located on the mitochondrial inner membrane and contributes to the respiratory chain by shuttling electrons to the ubiquinone pool. We have discovered ascofuranone ( 1 ), a natural compound produced by Acremonium sclerotigenum , and its derivatives are a potent class of HsDHODH inhibitors ...

    Human dihydroorotate dehydrogenase (HsDHODH) is a key enzyme of pyrimidine de novo biosynthesis pathway. It is located on the mitochondrial inner membrane and contributes to the respiratory chain by shuttling electrons to the ubiquinone pool. We have discovered ascofuranone ( 1 ), a natural compound produced by Acremonium sclerotigenum , and its derivatives are a potent class of HsDHODH inhibitors. We conducted a structure-activity relationship study and have identified functional groups of 1 that are essential for the inhibition of HsDHODH enzymatic activity. Furthermore, the binding mode of 1 and its derivatives to HsDHODH was demonstrated by co-crystallographic analysis and we show that these inhibitors bind at the ubiquinone binding site. In addition, the cytotoxicities of 1 and its potent derivatives 7 , 8 , and 9 were studied using human cultured cancer cells. Interestingly, they showed selective and strong cytotoxicity to cancer cells cultured under microenvironment (hypoxia and nutrient-deprived) conditions. The selectivity ratio of 8 under this microenvironment show the most potent inhibition which was over 1000-fold higher compared to that under normal culture condition. Our studies suggest that under microenvironment conditions, cancer cells heavily depend on the pyrimidine de novo biosynthesis pathway. We also provide the first evidence that 1 and its derivatives are potential lead candidates for drug development which target the HsDHODH of cancer cells living under a tumor microenvironment.


    Organizational Affiliation

    Department of Host-Defense Biochemistry, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Dihydroorotate dehydrogenase (quinone), mitochondrialA390Homo 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
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FMN (Subject of Investigation/LOI)
Query on FMN

Download Ideal Coordinates CCD File 
B [auth A]FLAVIN MONONUCLEOTIDE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
9BO (Subject of Investigation/LOI)
Query on 9BO

Download Ideal Coordinates CCD File 
K [auth A](2S,3E,7E)-9-(3-chloro-5-formyl-2,6-dihydroxy-4-methylphenyl)-3,7-dimethylnona-3,7-dien-2-yl acetate
C21 H27 Cl O5
YBGJUDVVSGWLOR-KYXQLXBKSA-N
 Ligand Interaction
ORO (Subject of Investigation/LOI)
Query on ORO

Download Ideal Coordinates CCD File 
C [auth A]OROTIC ACID
C5 H4 N2 O4
PXQPEWDEAKTCGB-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
H [auth A], I [auth A], J [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
D [auth A], E [auth A], F [auth A], G [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
9BO Binding MOAD:  5ZF8 IC50: 6.4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 90.526α = 90
b = 90.526β = 90
c = 122.544γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-26
    Type: Initial release
  • Version 1.1: 2018-10-03
    Changes: Data collection, Database references