RK-1355A, B

A: NPEdia
B: NPEdia
Producing organism
Streptomyces sp. RK88-1355
Biological activity
cytotoxicity, antimicrobial
Two novel quinomycin derivatives, RK-1355A and B, were isolated from a microbial metabolites fraction library of Streptomyces sp. RK88-1355 based on Natural Products Plot (NPPlot) screening. The structural elucidation of RK-1355A and B were established through two-dimensional NMR and mass spectrometric measurements. They belong to a class of quinomycin antibiotics family having 3-hydroxyquinaldic acid and a sulfoxide moiety. They are the first examples for natural products as a quinoline type quinomycin having a sulfoxide on the intramolecular cross-linkage. They showed potent antiproliferative activities against various cancer cell lines and they were also found to exhibit moderate antibacterial activity.
  • Lim CL, Nogawa T, Uramoto M, Okano A, Hongo Y, Nakamura T, Koshino H, Takahashi S, Ibrahim D, Osada H.: RK-1355A and B, novel quinomycin derivatives isolated from a microbial metabolites fraction library based on NPPlot screening.
    J Antibiot, 67(4): 323-329 (2014) PMID: 24496142 [ doi: 10.1038/ja.2013.144 ]
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