Download MendeleyStructural evidence for a programmed general base in the active site of a catalytic antibody.
Golinelli-Pimpaneau, B., Goncalves, O., Dintinger, T., Blanchard, D., Knossow, M., Tellier, C.(2000) Proc Natl Acad Sci U S A 97: 9892-9895
- PubMed: 10963661
- DOI: https://doi.org/10.1073/pnas.97.18.9892
- Primary Citation of Related Structures:
1F3D - PubMed Abstract:
The crystal structure of the complex of a catalytic antibody with its cationic hapten at 1.9-A resolution demonstrates that the hapten amidinium group is stabilized through an ionic pair interaction with the carboxylate of a combining-site residue. The location of this carboxylate allows it to act as a general base in an allylic rearrangement. When compared with structures of other antibody complexes in which the positive moiety of the hapten is stabilized mostly by cation-pi interactions, this structure shows that the amidinium moiety is a useful candidate to elicit a carboxylate in an antibody combining site at a predetermined location with respect to the hapten. More generally, this structure highlights the advantage of a bidentate hapten for the programmed positioning of a chemically reactive residue in an antibody through charge complementarity to the hapten.
Organizational Affiliation:
Laboratoire d'Enzymologie et Biochimie Structurales, Centre National de la Recherche Scientifique, Bâtiment 34, 1 Avenue de la Terrasse, 91198 Gif-sur-Yvette Cedex, France. beatrice.golinelli@lebs.cnrs-gif.fr
