Stereo- and Regioselective Azide/Alkyne Cycloadditions in Carbonic Anhydrase II via Tethering, Monitored by Crystallography and Mass Spectrometry
作者:Johannes Schulze Wischeler、Dong Sun、Nicola U. Sandner、Uwe Linne、Andreas Heine、Ulrich Koert、Gerhard Klebe
DOI:10.1002/chem.201002437
日期:2011.5.16
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