Zinostatin

Definition 1

An enediyne antineoplastic antibiotic hybrid containing an aminoglycoside chromophore. Zinostatin is isolated from the bacterium Streptomyces carzinostaticus. The aminoglycoside component of zinostatin intercalates into DNA and the benzene diradical intermediate of the enediyne core binds to the minor groove of DNA, resulting in single- and double-strand breaks in DNA and apoptosis. (NCI Thesaurus)

Definition 2

An antitumor isolate from the culture filtrate of the F-41 variant of Streptomyces carzinostaticus. It is a protein of known amino acid sequence with a molecular weight of approximately 11,500 and possessing a regulatory function on the metabolism of DNA. In this process, that is first an inhibition of DNA biosynthesis followed by the degradation of DNA, zinostatin functions in a manner analogous to that of the much higher molecular weight antibiotic MITOMYCIN. Zinostatin is also a potent cytostatic agent active against gram-positive organisms. (NLM, Medical Subject Headings)

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