The structure of human carbonic anhydrase II in complex with bromide and azide.
Jonsson, B.M., Hakansson, K., Liljas, A.(1993) FEBS Lett 322: 186-190
- PubMed: 8482389 
- DOI: https://doi.org/10.1016/0014-5793(93)81565-h
- Primary Citation of Related Structures:  
1RAY, 1RAZ - PubMed Abstract: 
The three-dimensional structure of human carbonic anhydrase II complexed with azide and with bromide was investigated crystallographically. Both of these non-protonated inhibitors replace the zinc and the 'deep' water, two catalytically important water molecules in the active site of the molecule. Both the azide and the bromide ions bind in a distorted tetrahedral manner 0.4 and 1.1 A from the zinc water position, respectively, but are in close contact (2.0 and 2.6 A, respectively) with the zinc ion.
Organizational Affiliation: 
Department of Biophysics, Lund University, Sweden.