2Q1Q

Carbonic anhydrase inhibitors. Interaction of the antiepileptic drug sulthiame with twelve mammalian isoforms: kinetic and X-Ray crystallographic studies


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Carbonic anhydrase inhibitors. Interaction of the antiepileptic drug sulthiame with twelve mammalian isoforms: Kinetic and X-ray crystallographic studies.

Temperini, C.Innocenti, A.Mastrolorenzo, A.Scozzafava, A.Supuran, C.T.

(2007) Bioorg Med Chem Lett 17: 4866-4872

  • DOI: 10.1016/j.bmcl.2007.06.044
  • Primary Citation of Related Structures:  
    2Q1Q

  • PubMed Abstract: 
  • Sulthiame, a clinically used antiepileptic, was investigated for its interaction with 12 catalytically active mammalian carbonic anhydrase (CA, EC 4.2.1.1) isoforms. The drug is a potent inhibitor of CA II, VII, IX, and XII (K(I)s of 6-56 nM), and a medium potency inhibitor against CA IV, VA, VB, and VI (K(I)s of 81-134 nM) ...

    Sulthiame, a clinically used antiepileptic, was investigated for its interaction with 12 catalytically active mammalian carbonic anhydrase (CA, EC 4.2.1.1) isoforms. The drug is a potent inhibitor of CA II, VII, IX, and XII (K(I)s of 6-56 nM), and a medium potency inhibitor against CA IV, VA, VB, and VI (K(I)s of 81-134 nM). The high resolution crystal structure of the hCA II-sulthiame adduct revealed a large number of favorable interactions between the drug and the enzyme which explain its strong low nanomolar affinity for this isoform and may also be exploited for the design of effective inhibitors incorporating sultam moieties.


    Organizational Affiliation

    Università degli Studi di Firenze, Polo Scientifico, Laboratorio di Chimica Bioinorganica, Rm 188, Via della Lastruccia 3, 50019 Sesto Fiorentino (Florence), Italy.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbonic anhydrase 2A260N/AMutation(s): 0 
EC: 4.2.1.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens)
Explore P00918 
Go to UniProtKB:  P00918
PHAROS:  P00918
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
OSP
Query on OSP

Download Ideal Coordinates CCD File 
D [auth A]SULTHIAME
C10 H14 N2 O4 S2
HMHVCUVYZFYAJI-UHFFFAOYSA-N
 Ligand Interaction
HG
Query on HG

Download Ideal Coordinates CCD File 
C [auth A]MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
OSP BindingDB:  2Q1Q Ki: min: 9, max: 9000 (nM) from 2 assay(s)
PDBBind:  2Q1Q Ki: 7 (nM) from 1 assay(s)
Binding MOAD:  2Q1Q Ki: 7 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.19α = 90
b = 41.28β = 104.29
c = 72.07γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
CrysalisProdata collection
CrysalisProdata reduction
SCALAdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description
  • Version 1.3: 2018-04-04
    Changes: Data collection