Fungal Metabolites. XVII. Synthesis and NMR Study of Ion Channel-Forming Peptides, Trichosporin B-VIa and Its Derivative.

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Abstract
A membrane-modifying peptide antibiotic, trichosporin B-VIa, having catecholamine secretion-inducing activity on bovine adrenal chromaffin cells has been synthesized. Aib14-Trichosporin B-VIa, in which Pro14 was replaced by Aib, has also been synthesized to modify the secondary structure of trichosporin B-VIa. Sequence-specific 1H-NMR assignments of both peptides in methanol were achieved by using two-dimensional NMR techniques.

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