Cyclic peptoids are macrocyclic oligomers of N-substituted glycines with specific folding abilities and excellent metal binding properties. In this work, we show how strategic positioning of chiral (S)-and (R)-(1-carboxyethyl)glycine units influences the conformational stability of water-soluble macrocyclic peptoids as sodium complexes. The reported results are based on nuclear magnetic resonance spectroscopy, extensive computational studies, and X-ray diffraction analysis using single crystals grown from aqueous solutions. The studies include 1H relaxometric investigations of hexameric cyclic peptoids in the presence of the Gd3+ ion to assess their thermodynamic stabilities and relaxivities.
Water-Soluble Chiral Cyclic Peptoids and Their Sodium and Gadolinium Complexes: Study of Conformational and Relaxometric Properties
Furlan C.;Gianolio E.;
2023-01-01
Abstract
Cyclic peptoids are macrocyclic oligomers of N-substituted glycines with specific folding abilities and excellent metal binding properties. In this work, we show how strategic positioning of chiral (S)-and (R)-(1-carboxyethyl)glycine units influences the conformational stability of water-soluble macrocyclic peptoids as sodium complexes. The reported results are based on nuclear magnetic resonance spectroscopy, extensive computational studies, and X-ray diffraction analysis using single crystals grown from aqueous solutions. The studies include 1H relaxometric investigations of hexameric cyclic peptoids in the presence of the Gd3+ ion to assess their thermodynamic stabilities and relaxivities.
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