X-ray diffraction is used to study the binding of xenon and krypton to a variety of crystallised proteins: porcine pancreatic elastase; subtilisin Carlsberg from Bacillus licheniformis; cutinase from Fusarium solani; collagenase from Hypoderma lineatum; hen egg lysozyme, the lipoamide dehydrogenase domain from the outer membrane protein P64k from Neisseria meningitidis; urate-oxidase from Aspergillus flavus, mosquitocidal delta-endotoxin CytB from Bacillus thuringiensis and the ligand-binding domain of the human nuclear retinoid-X receptor RXR-alpha ...
X-ray diffraction is used to study the binding of xenon and krypton to a variety of crystallised proteins: porcine pancreatic elastase; subtilisin Carlsberg from Bacillus licheniformis; cutinase from Fusarium solani; collagenase from Hypoderma lineatum; hen egg lysozyme, the lipoamide dehydrogenase domain from the outer membrane protein P64k from Neisseria meningitidis; urate-oxidase from Aspergillus flavus, mosquitocidal delta-endotoxin CytB from Bacillus thuringiensis and the ligand-binding domain of the human nuclear retinoid-X receptor RXR-alpha. Under gas pressures ranging from 8 to 20 bar, xenon is able to bind to discrete sites in hydrophobic cavities, ligand and substrate binding pockets, and into the pore of channel-like structures. These xenon complexes can be used to map hydrophobic sites in proteins, or as heavy-atom derivatives in the isomorphous replacement method of structure determination.
Related Citations:
Protein Crystallography at Ultra-Short Wavelengths: Feasability Study of Anomalous-Dispersion Experiments at the Xenon K-Edge Schiltz, M., Kvick, A., Svensson, O., Shepard, W., De La Fortelle, E., Prange, T., Kahn, R. (1997) J Synchrotron Radiat 4: 287
High-Pressure Krypton Gas and Statistical Heavy Atom Refinement: A Successful Combination of Tools for Macromolecular Structure Determination Schiltz, M., Shepard, W., Fourme, R., Prange, T., De La Fortelle, E., Bricogne, G. (1997) Acta Crystallogr D Biol Crystallogr 53: 78
The Active Site of Serine Proteinases as a Specific Binding Cavity for Xenon Schiltz, M., Fourme, R., Prange, T. (1995) Structure 3: 309
On the Preparation and X-Ray Data Collection of Isomorphous Xenon Derivatives Schiltz, M., Prange, T., Fourme, R. (1994) J Appl Crystallogr 27: 950
Organizational Affiliation:
LURE, Université Paris-Sud, Orsay, France. prange@lure.u-psud.fr
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