Bacillomycin Lc, a New Antibiotic of the Iturin Group: Isolation, Structures, and Antifungal Activities of the Congeners.

Abstract
Bacillomycin Lc, a new antifungal antibiotic of the iturin class, was isolated from a strain of Bacillus subtilis as a set of five congeners. The structure as determined by chemical and spectrometric analyses has been shown to differ from that of bacillomycin L by sequence changes from aspartate-1 to asparagine-1 and from glutamine-5 to glutamate-5. The five congeners differ from each other only in the structure of the aliphatic side chain of the constituent beta-amino acid. The hydrophobicity of the beta-amino acid affects the antifungal activity of the congener, as activity increased in the order of increased congener retention on a reversed-phase HPLC column.

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