3K47

Alternate Binding Modes Observed for the E- and Z-Isomers of 2,4-Diaminofuro[2,3-d]pyrimidines as Ternary Complexes with NADPH and Mouse Dihydrofolate Reductase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.187 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Design, synthesis, and X-ray crystal structures of 2,4-diaminofuro[2,3-d]pyrimidines as multireceptor tyrosine kinase and dihydrofolate reductase inhibitors.

Gangjee, A.Li, W.Lin, L.Zeng, Y.Ihnat, M.Warnke, L.A.Green, D.W.Cody, V.Pace, J.Queener, S.F.

(2009) Bioorg.Med.Chem. 17: 7324-7336

  • DOI: 10.1016/j.bmc.2009.08.044
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • To optimize dual receptor tyrosine kinase (RTK) and dihydrofolate reductase (DHFR) inhibition, the E- and Z-isomers of 5-[2-(2-methoxyphenyl)prop-1-en-1-yl]furo[2,3-d]pyrimidine-2,4-diamines (1a and 1b) were separated by HPLC and the X-ray crystal st ...

    To optimize dual receptor tyrosine kinase (RTK) and dihydrofolate reductase (DHFR) inhibition, the E- and Z-isomers of 5-[2-(2-methoxyphenyl)prop-1-en-1-yl]furo[2,3-d]pyrimidine-2,4-diamines (1a and 1b) were separated by HPLC and the X-ray crystal structures (2.0 and 1.4A, respectively) with mouse DHFR and NADPH as well as 1b with human DHFR (1.5A) were determined. The E- and Z-isomers adopt different binding modes when bound to mouse DHFR. A series of 2,4-diaminofuro[2,3-d]pyrimidines 2-13 were designed and synthesized using the X-ray crystal structures of 1a and 1b with DHFR to increase their DHFR inhibitory activity. Wittig reactions of appropriate 2-methoxyphenyl ketones with 2,4-diamino-6-chloromethyl furo[2,3-d]pyrimidine afforded the C8-C9 unsaturated compounds 2-7 and catalytic reduction gave the saturated 8-13. Homologation of the C9-methyl analog maintains DHFR inhibitory activity. In addition, inhibition of EGFR and PDGFR-beta were discovered for saturated C9-homologated analogs 9 and 10 that were absent in the saturated C9-methyl analogs.


    Organizational Affiliation

    Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, PA 15282, USA. gangjee@duq.edu




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydrofolate reductase
A
186Mus musculusMutation(s): 0 
Gene Names: Dhfr
EC: 1.5.1.3
Find proteins for P00375 (Mus musculus)
Go to UniProtKB:  P00375
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
D09
Query on D09

Download SDF File 
Download CCD File 
A
5-[(1E)-2-(2-methoxyphenyl)prop-1-en-1-yl]furo[2,3-d]pyrimidine-2,4-diamine
C16 H16 N4 O2
JXICVPBZQSPDOK-VQHVLOKHSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
D09IC50: 14500 - 18500 nM (100) BINDINGDB
D09IC50: 14500 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.187 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 41.432α = 90.00
b = 61.012β = 117.79
c = 43.217γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
MOLREPphasing
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-10-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2018-01-24
    Type: Structure summary