4H95

Candida albicans dihydrofolate reductase complexed with NADPH and 6-ethyl-5-{3-[3-methoxy-5-(pyridin-4-yl)phenyl]but-1-yn-1-yl}pyrimidine-2,4-diamine (UCP1006)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.240 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural analysis of the active sites of dihydrofolate reductase from two species of Candida uncovers ligand-induced conformational changes shared among species.

Paulsen, J.L.Viswanathan, K.Wright, D.L.Anderson, A.C.

(2013) Bioorg.Med.Chem.Lett. 23: 1279-1284

  • DOI: 10.1016/j.bmcl.2013.01.008
  • Primary Citation of Related Structures:  3RO9, 3ROA, 4H96, 4H98, 4H97

  • PubMed Abstract: 
  • A novel strategy for targeting the pathogenic organisms Candida albicans and Candida glabrata focuses on the development of potent and selective antifolates effective against dihydrofolate reductase. Crystal structure analysis suggested that an essen ...

    A novel strategy for targeting the pathogenic organisms Candida albicans and Candida glabrata focuses on the development of potent and selective antifolates effective against dihydrofolate reductase. Crystal structure analysis suggested that an essential loop at the active site (Thr 58-Phe 66) differs from the analogous residues in the human enzyme, potentially providing a mechanism for achieving selectivity. In order to probe the role of this loop, we employed chemical synthesis, crystal structure determination and molecular dynamics simulations. The results of these analyses show that the loop residues undergo ligand-induced conformational changes that are similar among the fungal and human species.


    Organizational Affiliation

    Department of Pharmaceutical Sciences, University of Connecticut, 69 N. Eagleville Rd., Storrs, CT 06269, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dihydrofolate Reductase
A, B
189Candida albicansGene Names: DFR1
EC: 1.5.1.3
Find proteins for P22906 (Candida albicans)
Go to UniProtKB:  P22906
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
06U
Query on 06U

Download SDF File 
Download CCD File 
A, B
6-ethyl-5-{(3R)-3-[3-methoxy-5-(pyridin-4-yl)phenyl]but-1-yn-1-yl}pyrimidine-2,4-diamine
C22 H23 N5 O
KEPLBUUTAQCZOE-AWEZNQCLSA-N
 Ligand Interaction
NDP
Query on NDP

Download SDF File 
Download CCD File 
A, B
NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.240 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 118.482α = 90.00
b = 118.856β = 90.00
c = 39.284γ = 90.00
Software Package:
Software NamePurpose
StructureStudiodata collection
d*TREKdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
d*TREKdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-27
    Type: Initial release
  • Version 1.1: 2013-11-20
    Type: Non-polymer description