Abstract
We report here the interaction of bradykinin with ganglioside GM1 by circular dichroism, steady-state fluorescence, and one-dimensional 1H NMR spectroscopy. Circular dichroism spectroscopy is indicative of a turn formation of bradykinin backbone in the presence of GM1 micelle. The fluorescence quenching efficiencies of iodide and acrylamide are substantially reduced, indicating a shielding of phenylalanine residue of bradykinin from aqueous environment. Significant line broadening of NMR resonances of bradykinin, suggestive of motional restriction, is observed.
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