3KIG

Mutant carbonic anhydrase II in complex with an azide and an alkyne


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.39 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.127 

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Ligand Structure Quality Assessment 


This is version 1.5 of the entry. See complete history


Literature

Stereo- and Regioselective Azide/Alkyne Cycloadditions in Carbonic Anhydrase II via Tethering, Monitored by Crystallography and Mass Spectrometry.

Schulze Wischeler, J.Sun, D.Sandner, N.U.Linne, U.Heine, A.Koert, U.Klebe, G.

(2011) Chemistry 17: 5842-5851

  • DOI: https://doi.org/10.1002/chem.201002437
  • Primary Citation of Related Structures:  
    3KIG, 3KNE

  • PubMed Abstract: 

    The carbonic anhydrase II mutant His64Cys was prepared and applied to tethered alkyne/azide cycloaddition reactions. The azide component could be tethered to the enzyme surface through a disulfide bridge, while the alkyne component was reversibly coordinated through a sulfonamide anchor to the zinc ion in the original catalytic center of the enzyme. The incipient orientation of the reactants in the binding site and of the formed triazole product were characterized by crystallography. The reaction progression could be monitored by HPLC-MS analysis.


  • Organizational Affiliation

    Institut für Pharmazeutische Chemie, Philipps-Universität Marburg, Marbacher Weg 6, 35032 Marburg, Germany.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Carbonic anhydrase 2265Homo sapiensMutation(s): 1 
Gene Names: CA2
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
GTEx:  ENSG00000104267 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
DA4 PDBBind:  3KIG IC50: 245 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.39 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.133 
  • R-Value Observed: 0.127 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.4α = 90
b = 41.4β = 104.1
c = 72.3γ = 90
Software Package:
Software NamePurpose
SHELXL-97refinement
CNSrefinement
MAR345data collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description
  • Version 1.3: 2019-07-17
    Changes: Data collection, Refinement description
  • Version 1.4: 2021-10-13
    Changes: Database references, Derived calculations
  • Version 1.5: 2024-02-21
    Changes: Data collection