Metabolic products of microorganisms
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Rinamycin interfered with DNA-polymerase I of Escherichia coli in cell-free systems more effectively than actinomycin C. Its inhibitory action could be relieved by increasing the concentration of polymerase. The rinamycin concentrations that caused effective inhibition of the RNA-polymerase reaction in vitro were approximately 10 times higher than those required to inhibit the DNA-polymerase reaction in vitro.
Derinamycin was as effective an inhibitor for the DNA-polymerase I reaction as actinomycin C, while having been stimulative for the RNA-polymerase reaction in cell-free systems of Escherichia coli. Its inhibitory action on DNA synthesis in vitro could be overcome by adding more DNA. In fact, spectral and antagonism studies suggested some sort of interaction between derinamycin and DNA.
Key wordsRinamycin Derinamycin Inhibitors DNA synthesis in vitro
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