3SRW

S. aureus Dihydrofolate Reductase complexed with novel 7-aryl-2,4-diaminoquinazolines


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure-based design of new DHFR-based antibacterial agents: 7-aryl-2,4-diaminoquinazolines.

Li, X.Hilgers, M.Cunningham, M.Chen, Z.Trzoss, M.Zhang, J.Kohnen, L.Lam, T.Creighton, C.G C, K.Nelson, K.Kwan, B.Stidham, M.Brown-Driver, V.Shaw, K.J.Finn, J.

(2011) Bioorg.Med.Chem.Lett. 21: 5171-5176

  • DOI: 10.1016/j.bmcl.2011.07.059
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Dihydrofolate reductase (DHFR) inhibitors such as trimethoprim (TMP) have long played a significant role in the treatment of bacterial infections. Not surprisingly, after decades of use there is now bacterial resistance to TMP and therefore a need to ...

    Dihydrofolate reductase (DHFR) inhibitors such as trimethoprim (TMP) have long played a significant role in the treatment of bacterial infections. Not surprisingly, after decades of use there is now bacterial resistance to TMP and therefore a need to develop novel antibacterial agents with expanded spectrum including these resistant strains. In this study, we investigated the optimization of 2,4-diamnoquinazolines for antibacterial potency and selectivity. Using structure-based drug design, several 7-aryl-2,4-diaminoquinazolines were discovered that have excellent sub-100 picomolar potency against bacterial DHFR. These compounds have good antibacterial activity especially on gram-positive pathogens including TMP-resistant strains.


    Organizational Affiliation

    Trius Therapeutics, San Diego, CA 92121, United States.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydrofolate reductase
X
167Staphylococcus aureusMutation(s): 0 
Gene Names: folA
EC: 1.5.1.3
Find proteins for P0A017 (Staphylococcus aureus)
Go to UniProtKB:  P0A017
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NAP
Query on NAP

Download SDF File 
Download CCD File 
X
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
Q27
Query on Q27

Download SDF File 
Download CCD File 
X
7-(2-ethoxynaphthalen-1-yl)-6-methylquinazoline-2,4-diamine
C21 H20 N4 O
DYQBRXOQGFCHCN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
Q27Ki: 0 nM (100) BINDINGDB
Q27Ki: 0.026 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.192 
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 79.287α = 90.00
b = 79.287β = 90.00
c = 107.354γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-07-07 
  • Released Date: 2011-08-31 
  • Deposition Author(s): Hilgers, M.

Revision History 

  • Version 1.0: 2011-08-31
    Type: Initial release
  • Version 1.1: 2011-10-19
    Type: Database references