4TX6

AfChiA1 in complex with compound 1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.156 

wwPDB Validation 3D Report Full Report



Literature

Screening-based discovery of Aspergillus fumigatus plant-type chitinase inhibitors

Lockhart, D.E.Schuettelkopf, A.W.Blair, D.E.van Aalten, D.M.F.

(2014) FEBS Lett 588: 3282

  • DOI: 10.1016/j.febslet.2014.07.015
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • A limited therapeutic arsenal against increasing clinical disease due to Aspergillus spp. necessitates urgent characterisation of new antifungal targets. Here we describe the discovery of novel, low micromolar chemical inhibitors of Aspergillus fumig ...

    A limited therapeutic arsenal against increasing clinical disease due to Aspergillus spp. necessitates urgent characterisation of new antifungal targets. Here we describe the discovery of novel, low micromolar chemical inhibitors of Aspergillus fumigatus family 18 plant-type chitinase A1 (AfChiA1) by high-throughput screening (HTS). Analysis of the binding mode by X-ray crystallography confirmed competitive inhibition and kinetic studies revealed two compounds with selectivity towards fungal plant-type chitinases. These inhibitors provide new chemical tools to probe the effects of chitinase inhibition on A. fumigatus growth and virulence, presenting attractive starting points for the development of further potent drug-like molecules.


    Organizational Affiliation

    Division of Molecular Microbiology, College of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom; MRC Protein Phosphorylation and Ubiquitylation Unit, College of Life Sciences, University of Dundee, Dundee DD1 5EH, United Kingdom. Electronic address: dmfvanaalten@dundee.ac.uk.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Class III chitinase ChiA1
A, B
310Aspergillus fumigatus A1163Mutation(s): 0 
Gene Names: AFUB_052270
Find proteins for B0Y2Y2 (Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163))
Go to UniProtKB:  B0Y2Y2
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
38B
Query on 38B

Download CCD File 
A, B
3-(2-methoxyphenyl)-6-methyl[1,2]oxazolo[5,4-d]pyrimidin-4(5H)-one
C13 H11 N3 O3
XCLPDGVIHJQQOR-UHFFFAOYSA-N
 Ligand Interaction
PO4
Query on PO4

Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
38BIC50:  2600   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.184 
  • R-Value Work: 0.154 
  • R-Value Observed: 0.156 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 76.398α = 90
b = 128.514β = 90
c = 212.102γ = 90
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2014-07-02 
  • Released Date: 2014-08-06 
  • Deposition Author(s): van Aalten, D.M.F.

Revision History 

  • Version 1.0: 2014-08-06
    Type: Initial release