We report on the design and synthesis of molecules having E- and P-selectins blocking activity both in vitro and in vivo. The GlcNAc component of the selectin ligand sialylLewisX was replaced by an acyclic tether that links two saccharide units. The minimization of intramolecular dipole–dipole interactions and the gauche effect would be at the origin of the conformational bias imposed by this acyclic
Intramolecular Carbohydrate-Aromatic Interactions and Intermolecular van der Waals Interactions Enhance the Molecular Recognition Ability of GM1 Glycomimetics for Cholera Toxin
作者:Anna Bernardi、Daniela Arosio、Donatella Potenza、Inmaculada Sánchez-Medina、Silvia Mari、F. Javier Cañada、Jesús Jiménez-Barbero
DOI:10.1002/chem.200400084
日期:2004.9.20
has allowed their interactions with the toxin to be explained at the atomic level. It is shown that intramolecularvanderWaals and CH-pi carbohydrate-aromaticinteractions define the conformational properties of 7, which adopts a three-dimensional structure significantly preorganized for proper interaction with the toxin. The exploitation of this kind of sugar-aromatic interaction, which is very well
Synthesis of Ganglioside Mimics for Binding Studies with Myelin‐Associated Glycoprotein (MAG)*
作者:Sascha Janssen、Richard R. Schmidt
DOI:10.1080/07328300500176312
日期:2005.8
Glycosylation of 3‐O‐unprotected 2‐azido‐2‐deoxy‐galactopyranoside (compound 5) with O‐(2,3‐di‐O‐acyl‐4,6‐O‐benzylidene‐D‐galactopyranosyl) trichloroacetimidates (compounds 4A, B) as glycosyldonors afforded β (1–3)‐linked disaccharides (9A, B) in high yield. Removal of the 2,3‐O‐acyl groups and selective 3‐O‐alkylation with α‐benzyloxycarbonyl‐alkyl triflates furnished the protected target molecules
Development of Tools for the Design of Selectin Antagonists
作者:Hartmuth C. Kolb、Beat Ernst
DOI:10.1002/chem.19970031006
日期:1997.10
AbstractA molecular modeling tool for the rational design of E‐selectin antagonists based on the lead structure sialyl Lewisx has been developed. The binding affinity to the receptor is considerably influenced by the entropy and consequently by the antagonist's ability to place its pharmacophores in an optimal spatial arrangement, i.e., by its preorganization for binding. The computational model assesses the preorganization of a potential selectin antagonist with the aid of Monte Carlo (jumping between wells)/stochastic dynamics [MC(JBW)/SD] simulations. The model has been validated by correlating preorganization and bioactivity of several selectin antagonists. The results suggest that only preorganized compounds are likely to bind to E‐selectin.