6KPR

Quadruple mutant (N51I+C59R+S108N+I164L) plasmodium falciparum dihydrofolate reductase-thymidylate synthase (PfDHFR-TS) complexed with B12155 inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.195 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

6-Hydrophobic aromatic substituent pyrimethamine analogues as potential antimalarials for pyrimethamine-resistant Plasmodium falciparum.

Saepua, S.Sadorn, K.Vanichtanankul, J.Anukunwithaya, T.Rattanajak, R.Vitsupakorn, D.Kamchonwongpaisan, S.Yuthavong, Y.Thongpanchang, C.

(2019) Bioorg Med Chem 27: 115158-115158

  • DOI: https://doi.org/10.1016/j.bmc.2019.115158
  • Primary Citation of Related Structures:  
    6KOT, 6KP2, 6KP7, 6KPR

  • PubMed Abstract: 

    The series of des-Cl (unsubstituted) and m-Cl phenyl analogues of PYR with various flexible 6-substituents were synthesized and studied for the binding affinities with highly resistant quadruple mutant (QM) DHFR. The derivatives carrying 4 atoms linker with a terminal carboxyl substituted on the aromatic ring exhibited good inhibition to the QM enzyme and also showed effective antimalarial activities against resistant P. falciparum bearing the mutant enzymes with relatively low cytotoxicity to mammalian cells. The X-ray crystallographic analysis of the enzyme-inhibitor complexes suggested that the hydrophobic substituent at 6-position was accommodated well in the hydrophobic pocket and the optimal length of the flexible linker could effectively promote the binding of the terminal carboxyl group to the key amino acid residues, Arg59 and Arg122.


  • Organizational Affiliation

    National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, Pathumthani 12120, Thailand.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bifunctional dihydrofolate reductase-thymidylate synthase
A, B
608Plasmodium falciparumMutation(s): 0 
Gene Names: DHFR-TSV1/S
UniProt
Find proteins for D9N170 (Plasmodium falciparum)
Explore D9N170 
Go to UniProtKB:  D9N170
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupD9N170
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NDP
Query on NDP

Download Ideal Coordinates CCD File 
D [auth A],
H [auth B]
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
DQF (Subject of Investigation/LOI)
Query on DQF

Download Ideal Coordinates CCD File 
E [auth A],
I [auth B]
4-[3-[3-[2,6-bis(azanyl)-5-(3-chlorophenyl)pyrimidin-4-yl]propoxy]phenoxy]butanoic acid
C23 H25 Cl N4 O4
OXGBDAHIBSSGDL-UHFFFAOYSA-N
UMP
Query on UMP

Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]
2'-DEOXYURIDINE 5'-MONOPHOSPHATE
C9 H13 N2 O8 P
JSRLJPSBLDHEIO-SHYZEUOFSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
F [auth A],
J [auth B]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.241 
  • R-Value Work: 0.195 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.902α = 90
b = 156.504β = 90
c = 165.484γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Center for Genetic Engineering and Biotechnology (Thailand)ThailandP1450883
National Center for Genetic Engineering and Biotechnology (Thailand)ThailandP1850116

Revision History  (Full details and data files)

  • Version 1.0: 2019-12-04
    Type: Initial release
  • Version 1.1: 2023-11-22
    Changes: Data collection, Database references, Derived calculations, Refinement description