Journal of the Brazilian Chemical Society
Print version ISSN 0103-5053
MILAGRE, Cíntia D. F.; CABECA, Luís F.; ALMEIDA, Wanda P. and MARSAIOLI, Anita J.. β-lactam antibiotics epitope mapping with STD NMR spectroscopy: a study of drug-human serum albumin interaction. J. Braz. Chem. Soc. [online]. 2012, vol.23, n.3, pp.403-408. ISSN 0103-5053. http://dx.doi.org/10.1590/S0103-50532012000300005.
Molecular recognition events are key issues in many biological processes. STD NMR (saturation transfer difference nuclear magnetic resonance spectroscopy) is one of the techniques used to understand such biological interactions. Herein, we have investigated the interactions of four β-lactam antibiotics belonging to two classes (cephalosporins and penicillins) with human serum albumin (HSA) by 1H STD NMR revealing that the interaction between the aromatic moiety and HSA is responsible for the binding efficiency. Thus, the structural differences from the five to six-membered thio ring in penicillins and cephalosporins do not seem to influence antibiotic-albumin interactions.
Keywords : STD NMR; ligand-macromolecules interaction; albumin; β-lactam antibiotics.