3IEO

The coumarin-binding site in carbonic anhydrase: the antiepileptic lacosamide as an example


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The coumarin-binding site in carbonic anhydrase accommodates structurally diverse inhibitors: the antiepileptic lacosamide as an example and lead molecule for novel classes of carbonic anhydrase inhibitors

Temperini, C.Innocenti, A.Scozzafava, A.Parkkila, S.Supuran, C.T.

(2010) J Med Chem 53: 850-854

  • DOI: 10.1021/jm901524f
  • Primary Citation of Related Structures:  
    3IEO

  • PubMed Abstract: 
  • Coumarins constitute a general and totally new class of inhibitors of the zinc enzyme carbonic anhydrase (CA, EC 4.2.1.1), binding at the entrance of the active site cavity. We report here that the coumarin-binding site in CAs may interact with diver ...

    Coumarins constitute a general and totally new class of inhibitors of the zinc enzyme carbonic anhydrase (CA, EC 4.2.1.1), binding at the entrance of the active site cavity. We report here that the coumarin-binding site in CAs may interact with diverse compounds, such as the antiepileptic drug lacosamide, which inhibits mammalian CAs I-XV, with inhibition constants in range of 331 nM to 4.56 microM. Its X-ray crystal structure in adduct with CA II reveals the molecular basis for this inhibition. Lacosamide was found in the coumarin-binding site, making favorable van der Waals interactions with Thr200, Asn67, Gln92, and Phe131. No interactions with the Zn(II) ion were evidenced in the CA II-lacosamide adduct. The coumarin-binding site may thus accommodate structurally diverse compounds which possess an inhibition mechanism distinct of that of sulfonamides. This finding opens new possibilities for designing CA inhibitors/activators with various biomedical applications.


    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbonic anhydrase 2A260Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens)
Explore P00918 
Go to UniProtKB:  P00918
NIH Common Fund Data Resources
PHAROS  P00918
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AMJ
Query on AMJ

Download CCD File 
A
N~2~-acetyl-N-benzyl-O-methyl-L-serinamide
C13 H18 N2 O3
VPPJLAIAVCUEMN-LBPRGKRZSA-N
 Ligand Interaction
HG
Query on HG

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A
MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
BEZ
Query on BEZ

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A
BENZOIC ACID
C7 H6 O2
WPYMKLBDIGXBTP-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
AMJKi :  331   nM  PDBBind
AMJKi:  331   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.255 
  • R-Value Observed: 0.257 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.19α = 90
b = 41.55β = 104.56
c = 72.23γ = 90
Software Package:
Software NamePurpose
CrysalisProdata collection
AMoREphasing
REFMACrefinement
CrysalisProdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-01-26
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2014-02-05
    Changes: Database references, Structure summary
  • Version 1.3: 2017-11-01
    Changes: Refinement description