Abstract
The cell-free extracts of a landomycin E-producing strain, Streptomyces globisporus 1912-2, were shown to contain a low-molecular-weight compound that, like A-factor, restored the landomycin E and streptomycin biosynthesis and sporulation of the defective mutants S. globisporus 1912-B2 and S. griseus 1439, respectively. The compound was purified by thin layer chromatography and HPLC. It had an absorption maximum at λmax=245 nm and a molecular mass of m/z 244. On the basis of NMR spectroscopy (1H, 13C, HSQC, HMBC, COSY and NOE) the chemical structure of the compound was elucidated as 6-benzyl-3-eth-(Z)-ylidene-1-methyl-piperazine-2,6-dione ((L)-N-methylphenylalanyl-dehydrobutyrine diketopiperazine (MDD)). The sequences of arpA genes in S. globisporus 1912-2 and S. griseus NBRC 13350 are highly conserved. An explanation for the observed biological activity of MDD was proposed.
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This work was supported by the National Academy of Sciences of the Ukraine (0111U000606).
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Matselyukh, B., Mohammadipanah, F., Laatsch, H. et al. N-methylphenylalanyl-dehydrobutyrine diketopiperazine, an A-factor mimic that restores antibiotic biosynthesis and morphogenesis in Streptomyces globisporus 1912-B2 and Streptomyces griseus 1439. J Antibiot 68, 9–14 (2015). https://doi.org/10.1038/ja.2014.86
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DOI: https://doi.org/10.1038/ja.2014.86
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