Binding interactions of a series of sulfonated water-soluble resorcinarenes with bovine liver catalase
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2020-05-21
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Abstract
Resorcinarenes are macrocyclic molecules that can bind different molecules in a supramolecular fashion. There
are some sulfonated water-soluble derivatives that have been investigated to bind proteins avoiding fibrillation.
The interactionwith enzymes such as catalase (CAT) allows the interpretation of the possible effects of the use of
resorcinarenes on human health or environmental applications. The interaction of five sulfonated resorcinarenes
with different chemical structures was investigated by using different biophysical methods. The results of the
spectroscopic experiments (fluorescence, synchronous fluorescence, and Uv-vis spectrophotometry) show different
degrees of structural change, indicating that the binding of themacrocycles thatwere studied causes alterations
on the conformation of CAT. The resorcinarenes reduce the activity of CAT in different extent, two
macrocycles (named Na4EtRA and Na4PrRA, according to ethyl or propyl moieties at the lower pendant group)
exhibit significant inhibition capacity (until ca. 70%). The study about inhibition types reveals a noncompetitive
mechanism for all the studied resorcinarenes. The docking calculations reveal that the macrocycles
bond mainly to two domains of the CAT structure, which are not related with the active site.
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Atribución-NoComercial-SinDerivadas 2.5 Colombia