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1 Wiadomości Chemiczne

1 2005

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Zastosowanie spektroskopii jądrowego rezonansu magnetycznego w badaniach oddziaływań międzycząsteczkowych ligandów organicznych i biocząsteczek

Bocian W., Kozerski L.

Wiadomości Chemiczne

2005

[Z] 59, 1-2

3--22

The title problem is reviewed in the three main areas of general interest to chemists, biochemists and biologists, i.e. mutual interactions of small molecules, ligand to biomolecule binding and interactions of biomolecules. Physical phenomena, specific and nonspecific, such as hydrogen bonding, self association, hydrophobic interactions, etc., are shown as being defined by NMR spectral parameters in solution and solid state. Diversity of hydrogen bonding encountered in nature is exemplified by the interaction of acetic acid with Watson-Crick vs Hoogsteen faces of adenosine, studied by DNMR in organic solvent at low temperatures. The complementarity of solid state NMR to solution studies of defining the nature of hydrogen bonding is presented in the case of genistein interaction with nitrogen bases. Application of a title method is presented for searching the geometry of complexes formed of organic ligands and biological molecules. General protocol for searching the geometry of complex is presented for the case of topotecan (TPT) interaction with duplex octamer and nicked decamer duplexes of DNA. Interaction of biomolecules is presented for the case of duplex octamer DNMR study showing effects of base pairing and stacking on the b 'H values and insulin aggregation as studied by Pulse Field Gradient NMR spectroscopy leading to relating the radius of molecular aggregate with the diffusion constants. In conclusion it is stated that various NMR techniques in solid and liquid state, coupled with X-ray and MS, constitute modern tool of structural biology in pursue of disclosing functions of biomolecules expressed by their interactions.