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 

wwPDB Validation 3D Report Full Report


This is version 1.2 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: 10.1002/chem.201002437
  • Primary Citation of Related Structures:  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 coo ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
265Homo sapiensGene 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
DA4
Query on DA4

Download SDF File 
Download CCD File 
A
3-ethynylbenzenesulfonamide
C8 H7 N O2 S
WGEWFHNQCHZZMF-UHFFFAOYSA-N
 Ligand Interaction
DA9
Query on DA9

Download SDF File 
Download CCD File 
A
2-azido-N-(2-sulfanylethyl)ethanamide
C4 H8 N4 O S
JSHBGIMPVAGZMY-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
DA4IC50: 245 nM BINDINGMOAD
DA4IC50: 245 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.39 Å
  • R-Value Free: 0.191 
  • R-Value Work: 0.133 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.400α = 90.00
b = 41.400β = 104.10
c = 72.300γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
SHELXL-97refinement
HKL-2000data scaling
CNSphasing
MAR345data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-01
    Type: Refinement description