2XTK

ChiA1 from Aspergillus fumigatus in complex with acetazolamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Acetazolamide-Based Fungal Chitinase Inhibitors.

Schuttelkopf, A.W.Gros, L.Blair, D.E.Frearson, J.A.Van Aalten, D.M.F.Gilbert, I.H.

(2010) Bioorg.Med.Chem. 18: 8334

  • DOI: 10.1016/j.bmc.2010.09.062

  • PubMed Abstract: 
  • Chitin is an essential structural component of the fungal cell wall. Chitinases are thought to be important for fungal cell wall remodelling, and inhibition of these enzymes has been proposed as a potential strategy for development of novel anti-fung ...

    Chitin is an essential structural component of the fungal cell wall. Chitinases are thought to be important for fungal cell wall remodelling, and inhibition of these enzymes has been proposed as a potential strategy for development of novel anti-fungals. The fungal pathogen Aspergillus fumigatus possesses two distinct multi-gene chitinase families. Here we explore acetazolamide as a chemical scaffold for the inhibition of an A. fumigatus 'plant-type' chitinase. A co-crystal structure of AfChiA1 with acetazolamide was used to guide synthesis and screening of acetazolamide analogues that yielded SAR in agreement with these structural data. Although acetazolamide and its analogues are weak inhibitors of the enzyme, they have a high ligand efficiency and as such are interesting leads for future inhibitor development.


    Organizational Affiliation

    University of Dundee, Sir James Black Centre, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CLASS III CHITINASE CHIA1
A, B
310Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163)Mutation(s): 0 
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
PO4
Query on PO4

Download SDF File 
Download CCD File 
A, B
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
AZM
Query on AZM

Download SDF File 
Download CCD File 
A, B
5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE
C4 H6 N4 O3 S2
BZKPWHYZMXOIDC-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
AZMIC50: 164000 nM (100) BINDINGDB
AZMIC50: 164000 nM BINDINGMOAD
AZMIC50: 164000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.249 
  • R-Value Work: 0.216 
  • Space Group: I 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 76.638α = 90.00
b = 125.831β = 90.00
c = 211.688γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-10-26
    Type: Initial release
  • Version 1.1: 2012-08-29
    Type: Database references