Effective Production of Dehydro Cyclic Dipeptide Albonoursin Exhibiting Pronuclear Fusion Inhibitory Activity. II. Biosynthetic and Bioconversion Studies.:II. Biosynthetic and Bioconversion Studies

Hiroshi Kanzaki, Daisuke Imura, Teruhiko Nitoda, Kazuyoshi Kawazu

Research output: Contribution to journalArticle


Albonoursin production was greatly enhanced when cyclo (L-Leu-L-Phe) (CFL), a tetrahydro derivative of albonoursin, was added to the 2-day culture of an albonoursinproducing actinomycete, <i>Streptomyces albulus</i> KO-23. The increase in albonoursin production paralleled the amount of CFL added. Furthermore, the resting cells of the strain catalyzed the bioconversion of CFL to albonoursin. The optimum pH and temperature for the conversion were found to be pH 10.0 and 50°C. The feeding experiments and the resting-cell reactions revealed that albonoursin is biosynthesized by dehydrogenation of CFL in the actinomycete. This is the first report for a dehydrogenation of amino acid residues at the α, β-positions in cyclic dipeptides.
Original languageEnglish
Pages (from-to)58-62
Number of pages5
JournalJournal of Antibiotics
Issue number1
Publication statusPublished - 2000
Externally publishedYes


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