2W3Q

Structure and inhibition of the CO2-sensing carbonic anhydrase Can2 from the pathogenic fungus Cryptococcus neoformans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.34 Å
  • R-Value Free: 0.185 
  • R-Value Observed: 0.138 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure and Inhibition of the Co(2)-Sensing Carbonic Anhydrase Can2 from the Pathogenic Fungus Cryptococcus Neoformans.

Schlicker, C.Hall, R.A.Vullo, D.Middelhaufe, S.Gertz, M.Supuran, C.T.Muehlschlegel, F.A.Steegborn, C.

(2009) J Mol Biol 385: 1207

  • DOI: 10.1016/j.jmb.2008.11.037
  • Primary Citation of Related Structures:  
    2W3N, 2W3Q

  • PubMed Abstract: 
  • In the pathogenic fungus Cryptococcus neoformans, a CO(2)-sensing system is essential for survival in the natural environment (approximately 0.03% CO(2)) and mediates the switch to virulent growth in the human host (approximately 5% CO(2)). This syst ...

    In the pathogenic fungus Cryptococcus neoformans, a CO(2)-sensing system is essential for survival in the natural environment (approximately 0.03% CO(2)) and mediates the switch to virulent growth in the human host (approximately 5% CO(2)). This system is composed of the carbonic anhydrase (CA) Can2, which catalyzes formation of bicarbonate, and the fungal, bicarbonate-stimulated adenylyl cyclase Cac1. The critical role of these enzymes for fungal metabolism and pathogenesis identifies them as targets for antifungal drugs. Here, we prove functional similarity of Can2 to the CA Nce103 from Candida albicans and describe its biochemical and structural characterization. The crystal structure of Can2 reveals that the enzyme belongs to the "plant-type" beta-CAs but carries a unique N-terminal extension that can interact with the active-site entrance of the dimer. We further tested a panel of compounds, identifying nanomolar Can2 inhibitors, and present the structure of a Can2 complex with the inhibitor and product analog acetate, revealing insights into interactions with physiological ligands and inhibitors.


    Organizational Affiliation

    Department of Physiological Chemistry, Ruhr-University Bochum, Universitätsstrasse 150, 44801 Bochum, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CARBONIC ANHYDRASE 2A243Cryptococcus neoformansMutation(s): 0 
EC: 4.2.1.1
Find proteins for Q3I4V7 (Cryptococcus neoformans var. grubii)
Explore Q3I4V7 
Go to UniProtKB:  Q3I4V7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.34 Å
  • R-Value Free: 0.185 
  • R-Value Observed: 0.138 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.19α = 90
b = 55.19β = 90
c = 134.59γ = 120
Software Package:
Software NamePurpose
SHELXL-97refinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-12-30
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance