4ILX

Structure of human carbonic anhydrase II in complex with an adamantyl sulfonamide inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural effect of phenyl ring compared to thiadiazole based adamantyl-sulfonamides on carbonic anhydrase inhibition.

Biswas, S.Carta, F.Scozzafava, A.McKenna, R.Supuran, C.T.

(2013) Bioorg.Med.Chem. 21: 2314-2318

  • DOI: 10.1016/j.bmc.2013.02.022

  • PubMed Abstract: 
  • We investigated the inhibitory activity of sulfonamides incorporating adamantyl moieties against the physiologically relevant human (h) CA (EC 4.2.1.1) isoforms hCA I, II III (cytosolic), IX and XII (transmembrane, tumor-associated). The presence of ...

    We investigated the inhibitory activity of sulfonamides incorporating adamantyl moieties against the physiologically relevant human (h) CA (EC 4.2.1.1) isoforms hCA I, II III (cytosolic), IX and XII (transmembrane, tumor-associated). The presence of a benzenesulfonamide instead of an 1,3,4-thiadiazole-sulfonamide fragment in the molecule of CA inhibitors (CAIs) drastically affects both inhibition efficacy and binding within the enzyme active site, as rationalized by means of X-ray crystallography of the adduct of hCA II with 4-(1-adamantylcarboxamidomethyl)benzenesulfonamide. Comparing the present X-ray structure with that of the corresponding 1,3,4-thiadiazole-sulfonamide compound possessing the 1-adamantylcarboxamide moiety, important differences of binding emerged, which explain the highly different inhibition profile of the two compounds against the investigated CA isoforms, most of which (CA I, II, IX and XII) are important drug targets.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, College of Medicine, University of Florida, PB 100245, Gainesville, FL 32610, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
257Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens)
Go to Gene View: CA2
Go to UniProtKB:  P00918
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
1EZ
Query on 1EZ

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Download CCD File 
A
N-(4-sulfamoylphenyl)-2-[(3S,5S,7S)-tricyclo[3.3.1.1~3,7~]dec-1-yl]acetamide
C18 H24 N2 O3 S
IOBDJZDMMNHNAM-WXZYKRPKSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
DMS
Query on DMS

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Download CCD File 
A
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1EZKi: 233 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.185 
  • R-Value Work: 0.149 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.382α = 90.00
b = 41.354β = 104.10
c = 72.096γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release
  • Version 1.1: 2013-05-29
    Type: Database references