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Abstract
A new peptide, emblestatin (1), was discovered from a culture broth of Embleya scabrispora K20-0267. This strain was isolated from soil using an agar medium containing lysozyme. Based on NMR and mass spectrometric analyses, 1 consists of 2-(2-hydroxyphenyl)-2-oxazoline, β-alanine, glutamine, Nα-methyl-Nω-hydroxyornithine and 3-amino-1-hydroxy-2-piperidone moieties. Further analysis using the advanced Marfey's method revealed that all amino acids with the stereogenic α-carbon in 1 had the L configuration. Compound 1 exhibited iron chelating activity and weak antibacterial activity against Proteus vulgaris and Staphylococcus aureus.
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