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Org Biomol Chem. 2011 Jan 7;9(1):154-64. doi: 10.1039/c0ob00425a. Epub 2010 Nov 18.

Computational and experimental investigations of mono-septanoside binding by Concanavalin A: correlation of ligand stereochemistry to enthalpies of binding.

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  • 1Department of Chemistry, The University of Connecticut, 55 North Eagleville Road, Storrs, CT 06269, USA.

Abstract

Structure-energy relationships for a small group of pyranose and septanose mono-saccharide ligands are developed for binding to Concanavalin A (ConA). The affinity of ConA for methyl "manno"β-septanoside 7 was found to be higher than any of the previously reported mono-septanoside ligands. Isothermal titration calorimetry (ITC) in conjunction with docking simulations and quantum mechanics/molecular mechanics (QM/MM) modeling established the specific role of binding enthalpy in the structure-energy relations of ConA bound to natural mono-saccharides and unnatural mono-septanosides. An important aspect in the differential binding among ligands is the deformation energy required to reorganize internal hydroxyl groups upon binding of the ligand to ConA.

PMID:
21085738
DOI:
10.1039/c0ob00425a
[PubMed - indexed for MEDLINE]
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