3CZV

Crystal structure of the human carbonic anhydrase XIII in complex with acetazolamide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.178 

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Literature

Crystal structure of human carbonic anhydrase XIII and its complex with the inhibitor acetazolamide.

Di Fiore, A., Monti, S.M., Hilvo, M., Parkkila, S., Romano, V., Scaloni, A., Pedone, C., Scozzafava, A., Supuran, C.T., De Simone, G.

(2008) Proteins 74: 164-175

  • DOI: 10.1002/prot.22144
  • Primary Citation of Related Structures:  
    3CZV, 3D0N

  • PubMed Abstract: 

    • The cytosolic isoform XIII is a recently discovered member of the human carbonic anhydrase (hCA, EC 4.2.1.1) family. It is selectively expressed among other tissues in the reproductive organs, where it may control pH and ion balance regulation, ensuring thus proper fertilization conditions ...

    The cytosolic isoform XIII is a recently discovered member of the human carbonic anhydrase (hCA, EC 4.2.1.1) family. It is selectively expressed among other tissues in the reproductive organs, where it may control pH and ion balance regulation, ensuring thus proper fertilization conditions. The authors report here the X-ray crystallographic structure of this isozyme in the unbound state and in complex with a classical sulfonamide inhibitor, namely acetazolamide. A detailed comparison of the obtained structural data with those already reported for other CA isozymes provides novel insights into the catalytic properties of the members of this protein family. On the basis of the inhibitory properties of acetazolamide against various cytosolic/transmembrane isoforms and the structural differences detected within the active site of the various CA isoforms, further prospects for the design of isozyme-specific CA inhibitors are here proposed.

    Related Citations: 
    • Refined structure of human carbonic anhydrase II at 2.0 A resolution
      Eriksson, A.E., Jones, T.A., Liljas, A.
      (1988) Proteins 4: 274
    Organizational Affiliation: 

    Istituto di Biostrutture e Bioimmagini-CNR, 80134 Naples, Italy.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbonic anhydrase 13A, B264Homo sapiensMutation(s): 0 
Gene Names: CA13
EC: 4.2.1.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N1Q1 (Homo sapiens)
Explore Q8N1Q1 
Go to UniProtKB:  Q8N1Q1
PHAROS:  Q8N1Q1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8N1Q1
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AZM
Query on AZM
Download Ideal Coordinates CCD File 
D [auth A],
F [auth B]		5-ACETAMIDO-1,3,4-THIADIAZOLE-2-SULFONAMIDE
C4 H6 N4 O3 S2
BZKPWHYZMXOIDC-UHFFFAOYSA-N		 Ligand Interaction
GOL
Query on GOL
Download Ideal Coordinates CCD File 
G [auth B]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
C [auth A],
E [auth B]		ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
AZM BindingDB:  3CZV Ki: min: 0.8, max: 179 (nM) from 11 assay(s)
Kd: min: 0.01, max: 79 (nM) from 10 assay(s)
IC50: min: 440, max: 1050 (nM) from 3 assay(s)
Binding MOAD:  3CZV Ki: 16 (nM) from 1 assay(s)
PDBBind:  3CZV Ki: 16 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.03α = 90
b = 81.567β = 90
c = 112.374γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
AMoREphasing
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-07-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance