We describe, in this article, the associative interaction between Linezolid and β-Cyclodextrin, and the influence of β-Cyclodextrin on Linezolid's binding to Bovine serum albumin. β-Cyclodextrin forms a 1:1 inclusion complex with Linezolid, with a binding constant value of 3.51×10(2)M(-1). The binding is studied using ultraviolet-visible absorption, fluorescence, nuclear magnetic resonance, and rotating-frame overhauser effect spectroscopic techniques. The amide substituent on the oxazolidinone ring of Linezolid is involved in its binding to β-Cyclodextrin. The binding of the Linezolid to bovine serum albumin, in the absence and the presence of β-Cyclodextrin, is studied by analyzing the fluorescence quenching and Förster resonance energy transfer. The Stern-Volmer quenching constant, the binding constant, and energy transfer occurring on the interaction of the Linezolid with BSA are found to be smaller in the presence of β-Cyclodextrin than in water.
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