3ANN

Crystal structure of 1-deoxy-D-xylulose 5-phosphate reductoisomerase (DXR) complexed with quinolin-2-ylmethylphosphonic acid

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 

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Literature

Structures of 1-Deoxy-D-Xylulose-5-Phosphate Reductoisomerase/Lipophilic Phosphonate Complexes

Deng, L., Endo, K., Kato, M., Cheng, G., Yajima, S., Song, Y.

(2011) ACS Med Chem Lett 2: 165-170

  • DOI: 10.1021/ml100243r
  • Primary Citation of Related Structures:  
    3ANL, 3ANM, 3ANN

  • PubMed Abstract: 

    • Fosmidomycin, a potent inhibitor of 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR), has antibacterial and antimalaria activity. Due to its poor pharmacokinetics, more lipophilic DXR inhibitors are needed. However, the hydrophobic binding site(s) in DXR remains elusive ...

    Fosmidomycin, a potent inhibitor of 1-deoxy-D-xylulose-5-phosphate reductoisomerase (DXR), has antibacterial and antimalaria activity. Due to its poor pharmacokinetics, more lipophilic DXR inhibitors are needed. However, the hydrophobic binding site(s) in DXR remains elusive. Here, pyridine/quinoline containing phosphonates are identified to be DXR inhibitors with IC(50) values as low as 840 nM. We also report three DXR:inhibitor structures, revealing a novel binding mode. The indole group of Trp211 is found to move ~4.6 Å to open up a mainly hydrophobic pocket, where the pyridine/quinoline rings of the inhibitors are located and have strong π-π stacking/charge-transfer interactions with the indole. Docking studies demonstrate our structures could be used to predict the binding modes of other lipophilic DXR inhibitors. Overall, this work shows an important role of Trp211 in inhibitor recognition and provides a structural basis for future drug design and development.

    Organizational Affiliation: 

    Department of Pharmacology, Baylor College of Medicine, 1 Baylor Plaza, Houston, Texas 77030.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
1-deoxy-D-xylulose 5-phosphate reductoisomeraseA, B420Escherichia coli K-12Mutation(s): 0 
Gene Names: dxr, ispC, yaeM, b0173, JW0168
EC: 1.1.1.267
UniProt
Find proteins for P45568 (Escherichia coli (strain K12))
Explore P45568 
Go to UniProtKB:  P45568
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP45568
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NDP
Query on NDP
Download Ideal Coordinates CCD File 
C [auth A],
E [auth B]		NADPH DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
C21 H30 N7 O17 P3
ACFIXJIJDZMPPO-NNYOXOHSSA-N		 Ligand Interaction
SYE
Query on SYE
Download Ideal Coordinates CCD File 
D [auth A],
F [auth B]		(quinolin-2-ylmethyl)phosphonic acid
C10 H10 N O3 P
SZCYKKWPKXABPU-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
SYE Binding MOAD:  3ANN IC50: 1.59e+4 (nM) from 1 assay(s)
BindingDB:  3ANN IC50: 1.59e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.184 
  • R-Value Observed: 0.186 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 182.627α = 90
b = 59.279β = 90
c = 87.208γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-02-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-10-19
    Changes: Database references