3HS4

Human carbonic anhydrase II complexed with acetazolamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.140 
  • R-Value Work: 0.112 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

High-resolution structure of human carbonic anhydrase II complexed with acetazolamide reveals insights into inhibitor drug design.

Sippel, K.H.Robbins, A.H.Domsic, J.Genis, C.Agbandje-McKenna, M.McKenna, R.

(2009) Acta Crystallogr.,Sect.F 65: 992-995

  • DOI: 10.1107/S1744309109036665

  • PubMed Abstract: 
  • The crystal structure of human carbonic anhydrase II (CA II) complexed with the inhibitor acetazolamide (AZM) has been determined at 1.1 A resolution and refined to an R(cryst) of 11.2% and an R(free) of 14.7%. As observed in previous CA II-inhibitor ...

    The crystal structure of human carbonic anhydrase II (CA II) complexed with the inhibitor acetazolamide (AZM) has been determined at 1.1 A resolution and refined to an R(cryst) of 11.2% and an R(free) of 14.7%. As observed in previous CA II-inhibitor complexes, AZM binds directly to the zinc and makes several key interactions with active-site residues. The high-resolution data also showed a glycerol molecule adjacent to the AZM in the active site and two additional AZMs that are adventitiously bound on the surface of the enzyme. The co-binding of AZM and glycerol in the active site demonstrate that given an appropriate ring orientation and substituents, an isozyme-specific CA inhibitor may be developed.


    Related Citations: 
    • Refined structure of the acetazolamide complex of human carbonic anhydrase II at 1.9 A.
      Vidgren, J.,Liljas, A.,Walker, N.P.
      (1990) Int.J.Biol.Macromol. 12: 342


    Organizational Affiliation

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




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 3 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
GOL
Query on GOL

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

Download SDF File 
Download CCD File 
A
5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE
C4 H6 N4 O3 S2
BZKPWHYZMXOIDC-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.140 
  • R-Value Work: 0.112 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.252α = 90.00
b = 41.097β = 104.31
c = 71.820γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97refinement
CNSphasing
HKL-2000data reduction
CNSrefinement
ADSCdata collection
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-12-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance