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Default NMR spectroscopic and molecular modeling studies of protein-carbohydrate and protein-

NMR spectroscopic and molecular modeling studies of protein-carbohydrate and protein-peptide interactions.

Related Articles NMR spectroscopic and molecular modeling studies of protein-carbohydrate and protein-peptide interactions.

Carbohydr Res. 2004 Apr 2;339(5):907-28

Authors: Johnson MA, Pinto BM

Investigations of the conformations of carbohydrates, their analogues and their molecular mimics are described, with emphasis on structural and functional information that can be gained by NMR spectroscopic techniques in combination with molecular modeling. The transferred nuclear Overhauser effect (trNOE) has been employed to determine the bound conformations of carbohydrates and other bioactive molecules in complex with protein receptors. The corresponding experiments in the rotating frame (trROE) and selective editing experiments (e.g., QUIET-NOESY) are used to eliminate indirect cross-relaxation pathways (spin diffusion), thereby minimizing errors in the data used for calculation of conformations. Saturation transfer difference NMR experiments reveal detailed information about intermolecular contacts between ligand and protein. Computational techniques are integrated with NMR-derived information to construct structural models of these bioactive molecules and of their complexes with proteins. Recent investigations into the nature of molecular mimicry with regard to protein-ligand interactions are described, along with applications in determining the mode of action of enzyme inhibitors. The results are relevant for the design of the next generation of drug and vaccine candidates.

PMID: 15010299 [PubMed - indexed for MEDLINE]



Source: PubMed
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