3CAJ

Crystal structure of the human carbonic anhydrase II in complex with ethoxzolamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.180 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Carbonic anhydrase inhibitors: the X-ray crystal structure of ethoxzolamide complexed to human isoform II reveals the importance of thr200 and gln92 for obtaining tight-binding inhibitors

Di Fiore, A.Pedone, C.Antel, J.Waldeck, H.Witte, A.Wurl, M.Scozzafava, A.Supuran, C.T.De Simone, G.

(2008) Bioorg.Med.Chem.Lett. 18: 2669-2674

  • DOI: 10.1016/j.bmcl.2008.03.023

  • PubMed Abstract: 
  • Ethoxzolamide, an almost forgotten inhibitor of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1), is the only classical inhibitor whose structure in adduct with any isoform was not reported yet. We report here the inhibition data of this molecul ...

    Ethoxzolamide, an almost forgotten inhibitor of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1), is the only classical inhibitor whose structure in adduct with any isoform was not reported yet. We report here the inhibition data of this molecule with the 12 catalytically active mammalian isozymes (CA I-CA XIV) and the X-ray crystal structure with the cytosolic, ubiquitous isoform CA II. These data are presumably useful for the design of novel CA inhibitors, targeting various CA isozymes, considering that ethoxzolamide was already the lead molecule to obtain the second generation inhibitors, dorzolamide and brinzolamide, clinically used antiglaucoma agents with topical action, as well as various other investigational agents.


    Related Citations: 
    • Positions of His-64 and a bound water in human carbonic anhydrase II upon binding three structurally related inhibitors
      Smith, G.M.,Alexander, R.S.,Christianson, D.W.,McKeever, B.M.,Ponticello, G.S.,Springer, J.P.,Randall, W.C.,Baldwin, J.J.,Habecker, C.N.
      (1994) Protein Sci. 3: 118
    • Structures of murine carbonic anhydrase IV and human carbonic anhydrase II complexed with brinzolamide: molecular basis of isozyme-drug discrimination
      Stams, T.,Chen, Y.,Boriack-Sjodin, P.A.,Hurt, J.D.,Liao, J.,May, J.A.,Dean, T.,Laipis, P.,Silverman, D.N.,Christianson, D.W.
      (1998) Protein Sci. 7: 556


    Organizational Affiliation

    Istituto di Biostrutture e Bioimmagini-CNR, via Mezzocannone 16, 80134 Napoli, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
260Homo 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 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MBO
Query on MBO

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Download CCD File 
A
MERCURIBENZOIC ACID
C7 H5 Hg O2
FVFZSVRSDNUCGG-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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

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Download CCD File 
A
6-ethoxy-1,3-benzothiazole-2-sulfonamide
Ethoxzolamide
C9 H10 N2 O3 S2
OUZWUKMCLIBBOG-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.214 
  • R-Value Work: 0.180 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.210α = 90.00
b = 41.360β = 104.35
c = 72.030γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSphasing
SCALEPACKdata scaling
MAR345data collection
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2008-04-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description