1. Glycan Dependence of Galectin-3 Self-Association Properties.
- Author
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Halimi, Hubert, Rigato, Annafrancesca, Byrne, Deborah, Ferracci, Géraldine, Sebban-Kreuzer, Corinne, ElAntak, Latifa, and Guerlesquin, Francoise
- Subjects
GLYCANS ,GALECTINS ,CELL membranes ,NUCLEAR magnetic resonance ,BIOMACROMOLECULES ,CELL adhesion - Abstract
Human Galectin-3 is found in the nucleus, the cytoplasm and at the cell surface. This lectin is constituted of two domains: an unfolded N-terminal domain and a C-terminal Carbohydrate Recognition Domain (CRD). There are still uncertainties about the relationship between the quaternary structure of Galectin-3 and its carbohydrate binding properties. Two types of self-association have been described for this lectin: a C-type self-association and a N-type self-association. Herein, we have analyzed Galectin-3 oligomerization by Dynamic Light Scattering using both the recombinant CRD and the full length lectin. Our results proved that LNnT induces N-type self-association of full length Galectin-3. Moreover, from Nuclear Magnetic Resonance (NMR) and Surface Plasmon Resonance experiments, we observed no significant specificity or affinity variations for carbohydrates related to the presence of the N-terminal domain of Galectin-3. NMR mapping clearly established that the N-terminal domain interacts with the CRD. We propose that LNnT induces a release of the N-terminal domain resulting in the glycan-dependent self-association of Galectin-3 through N-terminal domain interactions. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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