4QIZ

Crystal structure of human carbonic anhydrase isozyme XIII with inhibitor

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.179 

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Literature

Functionalization of Fluorinated Benzenesulfonamides and Their Inhibitory Properties toward Carbonic Anhydrases

Dudutiene, V., Zubriene, A., Smirnov, A., Timm, D.D., Smirnoviene, J., Kazokaite, J., Michailoviene, V., Zaksauskas, A., Manakova, E., Grazulis, S., Matulis, D.

(2015) ChemMedChem 10: 662-687

  • DOI: https://doi.org/10.1002/cmdc.201402490
  • Primary Citation of Related Structures:  
    4QIY, 4QIZ, 4QJ0, 4QJM, 4QJO, 4QJP, 4QJW, 4QJX, 4QTL

  • PubMed Abstract: 

    • Substituted tri- and tetrafluorobenzenesulfonamides were designed, synthesized, and evaluated as high-affinity and isoform-selective carbonic anhydrase (CA) inhibitors. Their binding affinities for recombinant human CA I, II, VA, VI, VII, XII, and XIII catalytic domains were determined by fluorescent thermal shift assay, isothermal titration calorimetry, and a stopped-flow CO2 hydration assay ...

    Substituted tri- and tetrafluorobenzenesulfonamides were designed, synthesized, and evaluated as high-affinity and isoform-selective carbonic anhydrase (CA) inhibitors. Their binding affinities for recombinant human CA I, II, VA, VI, VII, XII, and XIII catalytic domains were determined by fluorescent thermal shift assay, isothermal titration calorimetry, and a stopped-flow CO2 hydration assay. Variation of the substituents at the 2-, 3-, and 4-positions yielded compounds with a broad range of binding affinities and isoform selectivities. Several 2,4-substituted-3,5,6-trifluorobenzenesulfonamides were effective CA XIII inhibitors with high selectivity over off-target CA I and CA II. 3,4-Disubstituted-2,5,6-trifluorobenzenesulfonamides bound CAs with higher affinity than 2,4-disubstituted-3,5,6-trifluorobenzenesulfonamides. Many such fluorinated benzenesulfonamides were found to be nanomolar inhibitors of CA II, CA VII, tumor-associated CA IX and CA XII, and CA XIII. X-ray crystal structures of inhibitors bound in the active sites of several CA isoforms provide structure-activity relationship information for inhibitor binding affinities and selectivity.

    Organizational Affiliation: 

    Department of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, Graičiūno 8, Vilnius 02241 (Lithuania).



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbonic anhydrase 13A, B263Homo 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
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
WWX
Query on WWX
Download Ideal Coordinates CCD File 
F [auth A],
I [auth B]		2,3,6-trifluoro-5-{[(1R,2S)-2-hydroxy-1,2-diphenylethyl]amino}-4-[(2-hydroxyethyl)sulfonyl]benzenesulfonamide
C22 H21 F3 N2 O6 S2
ZOZJONWJZVJBCD-QUCCMNQESA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
C [auth A],
G [auth B]		ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
D [auth A],
E [auth A],
H [auth B]		1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
WWX Binding MOAD:  4QIZ Kd: 7.1 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.179 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.576α = 90
b = 159.618β = 90
c = 57.1γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
XDSdata reduction
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-04-15
    Type: Initial release
  • Version 1.1: 2018-05-16
    Changes: Data collection, Refinement description