Fungal Metabolites. XIX Structural Elucidation of Channel-Forming Peptides, Trichorovins-I-XIV, from the Fungus Trichoderma viride

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Trichorovins (TV)-I-XIV are new antibiotic peptides obtained from conidia of the fungus Trichoderma viride. The peptide mixture of TVs was repeatedly fractionated by preparative HPLC until individual TVs showed a single peak on their analytical HPLC chromatograms. Nevertheless, FAB-MS or NMR indicated that each of TVs-I-XIV was composed of at least two components. We attempted to elucidate their structures within the fractions by electrospray ionization (ESI)-MS, FAB-MS, FAB-MS/MS and NMR. TVs generally have molecular weights of approximately 1100-1200 Da, and are characterized by an acetylated N-terminus, the presence of an aminoalcohol, e.g. leucinol, isoleucinol or valinol, at the C-terminus, and eleven residues including three α-aminoisobutyric acids in the molecule. Thus, it was determined that TVs belong to the class of peptaibols.
社団法人日本薬学会の論文
1995-06-15