Journal
TETRAHEDRON
Volume 56, Issue 5, Pages 725-733Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4020(99)01017-0
Keywords
biologically active compound; biosynthesis; cyanobacteria; peptides and polypeptides
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For the elucidation of the biosynthetic relationship between non-toxic and hepatotoxic peptides produced by cyanobacteria, we compared the secondary metabolites from the toxic and non-toxic cyanobacteria, Oscillatoria (Planktothrix) agardhii. Three groups of peptides, cyclic depsipeptides having a 3-amino-6-hydroxy-2-piperidone moiety, a cyclic nonapeptide and cyclic peptides possessing an ureido linkage were isolated together with microcystins from the toxic O. agardhii strains 97 and CYA128. A tricyclic peptide composed of 14 amino acid residues was isolated from the non-toxic O. agardhii strains 2 and 18. (C) 2000 Elsevier Science Ltd. All rights reserved.
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