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Three new lipopeptides (1-3) were isolated from the organic extract of Bacillus amyloliquefaciens strain (BO7). These compounds represented the major constituents (>60%) of the total cell lipids extractable with CHCl(3)/MeOH (2:1). Elucidation of their chemical structure was carried out by spectroscopic analyses, including 1D and 2D NMR spectroscopy, mass spectrometry (MS), and secondary ion mass spectrometry (MS/MS), along with chemical degradation. The compounds are members of the surfactins family and are based on the heptapeptide Glu-Leu-Leu-Ala-Asp-Leu-Leu, N-acylated to the N-terminal by an (R)-3-hydroxy fatty acid with linear alkyl chains from 16:0 to 18:0 (1-3, respectively). An ester bond between the 3-hydroxyl group of the fatty acid and the carboxylic group of the C-terminal amino acid closes a 13-membered lactone ring. The bacterial lipopeptides, particularly compound 3, displayed strong and dose-dependent antifungal activity against the plant pathogenic fungus Fusarium oxysporum.
Dipartimento di Arboricoltura, Botanica e Patologia Vegetale, Università di Napoli Federico II, Portici (NA), Italy.
This article was published in the following journal.
Name: Journal of natural products
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A non-pathogenic species of Bacillus that occurs in soil as well as some fermented vegetables and FERMENTED DAIRY PRODUCTS. It produces BACTERIOCINS and ANTIFUNGAL AGENTS and is used in FOOD PRESERVATION as well as a PROBIOTIC.
One of the Type II site-specific deoxyribonucleases (EC 220.127.116.11). It recognizes and cleaves the sequence G/GATCC at the slash. BamHI is from Bacillus amyloliquefaciens N. Numerous isoschizomers have been identified. EC 3.1.21.-.
A species of Bacillus that occurs in soil and is frequently found on bird feathers. Some strains cause FOODBORNE DISEASE, whereas other strains produce ANTIFUNGAL AGENTS and ANTIBACTERIAL AGENTS and function as PROBIOTICS. This species can also produce enzymes for industrial applications.
A cyclic polypeptide antibiotic isolated from culture filtrates of Bacillus subtilis that acts as an antifungal agent.
Viruses whose host is Bacillus. Frequently encountered Bacillus phages include bacteriophage phi 29 and bacteriophage phi 105.