1EOU

CRYSTAL STRUCTURE OF HUMAN CARBONIC ANHYDRASE II COMPLEXED WITH AN ANTICONVULSANT SUGAR SULFAMATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of human carbonic anhydrase II complexed with an anti-convulsant sugar sulphamate.

Recacha, R.Costanzo, M.J.Maryanoff, B.E.Chattopadhyay, D.

(2002) Biochem.J. 361: 437-441


  • PubMed Abstract: 
  • The fructose-based sugar sulphamate RWJ-37497, a potent analogue of the widely used anti-epileptic drug topiramate, possesses anti-convulsant and carbonic anhydrase-inhibitory activities. We have studied the binding interactions of RWJ-37497 in the a ...

    The fructose-based sugar sulphamate RWJ-37497, a potent analogue of the widely used anti-epileptic drug topiramate, possesses anti-convulsant and carbonic anhydrase-inhibitory activities. We have studied the binding interactions of RWJ-37497 in the active site of human carbonic anhydrase II by X-ray crystallography. The atomic positions of the enzyme inhibitor complex were refined at a resolution of 2.1 A (1 A=0.1 nm) to the final crystallographic R and R(free) values of 0.18 and 0.23, respectively. The inhibitor co-ordinates to the active-site zinc ion through its oxygen atom and the ionized nitrogen atom of the sulphamate group by replacing the metal-bound water molecules, although the sulphamoyl oxygen atom provides a rather lengthy co-ordination. The 4,5-cyclic sulphate group is positioned in a hydrophobic pocket of the active site, making contacts with the residues Phe-131, Leu-198, Pro-201 and Pro-202. Since the ligand was found to be intact, concerns about RWJ-37947 irreversibly alkylating the enzyme through its 4,5-cyclic sulphate group were dispelled.


    Related Citations: 
    • Novel Binding Mode of Hydroxamate Inhibitors to Human Carbonic Anhydrase II
      Scolnick, L.R.,Clements, A.M.,Christianson, D.W.
      (1997) J.Am.Chem.Soc. 119: 850
    • tructure-Activity Studies on Anticonvulsant Sugar Sulfamates Related to Topiramate. Enhanced Potency with Cyclic Sulfate Derivatives
      Maryanoff, B.E.,Costanzo, M.J.,Nortey, S.O.,Greco, M.N.,Shank, R.P.
      (1998) J.Med.Chem. 41: 1315


    Organizational Affiliation

    Center for Biophysical Sciences and Engineering, and School of Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CARBONIC ANHYDRASE II (CA II)
A
260Homo sapiensGene 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 2 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
SMS
Query on SMS

Download SDF File 
Download CCD File 
A
SULFAMIC ACID 2,3-O-(1-METHYLETHYLIDENE)-4,5-O-SULFONYL-BETA-FRUCTOPYRANOSE ESTER
C9 H15 N O10 S2
GGOAQSGCBDRTHT-JAKMQLQISA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.176 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.275α = 90.00
b = 41.390β = 104.11
c = 72.509γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
CNSrefinement
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-02-13
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance