1TV5

Plasmodium falciparum dihydroorotate dehydrogenase with a bound inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structure of Plasmodium falciparum dihydroorotate dehydrogenase with a bound inhibitor.

Hurt, D.E.Widom, J.Clardy, J.

(2006) Acta Crystallogr.,Sect.D 62: 312-323

  • DOI: 10.1107/S0907444905042642

  • PubMed Abstract: 
  • Membrane-associated dihydroorotate dehydrogenase (DHODH) is an antimalarial therapeutic target without an effective inhibitor. Studies on human DHODH (HsDHODH) led to a structural mechanistic model in which respiratory quinones bind in a tunnel forme ...

    Membrane-associated dihydroorotate dehydrogenase (DHODH) is an antimalarial therapeutic target without an effective inhibitor. Studies on human DHODH (HsDHODH) led to a structural mechanistic model in which respiratory quinones bind in a tunnel formed by the highly variable N-terminus that leads to the flavin mononucleotide-binding site. The therapeutic agents leflunomide (Arava) and brequinar sodium inhibit HsDHODH by binding in this tunnel. Plasmodium falciparum DHODH (PfDHODH) and HsDHODH have markedly different sensitivities to the two drugs. To understand the structural basis of this differential sensitivity and begin a structure-based drug-design cycle for PfDHODH inhibitors, the three-dimensional structure (2.4 Angstroms, R = 20.1%) of PfDHODH bound to the active metabolite of leflunomide was determined by X-ray crystallography. Comparison of the structures of HsDHODH and PfDHODH reveals a completely different binding mode for the same inhibitor in these two catalytically identical enzymes and explains the previously observed species-specific preferential binding. Because no effective inhibitors have been described for PfDHODH, this structure provides critical insight for the design of potential antimalarials.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14850, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydroorotate dehydrogenase homolog, mitochondrial
A
443Plasmodium falciparumMutation(s): 0 
EC: 1.3.5.2
Find proteins for Q08210 (Plasmodium falciparum)
Go to UniProtKB:  Q08210
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

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

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Download CCD File 
A
FLAVIN MONONUCLEOTIDE
RIBOFLAVIN MONOPHOSPHATE
C17 H21 N4 O9 P
FVTCRASFADXXNN-SCRDCRAPSA-N
 Ligand Interaction
A26
Query on A26

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Download CCD File 
A
(2Z)-2-cyano-3-hydroxy-N-[4-(trifluoromethyl)phenyl]but-2-enamide
ANTIPROLIFERATIVE AGENT A771726
C12 H9 F3 N2 O2
UTNUDOFZCWSZMS-YFHOEESVSA-N
 Ligand Interaction
ORO
Query on ORO

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A
OROTIC ACID
C5 H4 N2 O4
PXQPEWDEAKTCGB-UHFFFAOYSA-N
 Ligand Interaction
N8E
Query on N8E

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Download CCD File 
A
3,6,9,12,15-PENTAOXATRICOSAN-1-OL
N-OCTYLPENTAOXYETHYLENE; PENTAETHYLENE GLYCOL MONOOCTYL ETHER; OCTYLPENTAGLYCOL N-OCTYLPENTAOXYETHYLENE
C18 H38 O6
MJELOWOAIAAUJT-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
A26Ki: ~1000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.201 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 105.428α = 90.00
b = 105.428β = 90.00
c = 276.632γ = 120.00
Software Package:
Software NamePurpose
RESOLVEmodel building
CNSrefinement
CCP4data scaling
SCALAdata scaling
DENZOdata reduction
RESOLVEphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-09-06
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance
  • Version 1.3: 2012-07-18
    Type: Non-polymer description